diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/application/model/Reactions.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/application/model/Reactions.kt
new file mode 100644
index 00000000..11d95f7e
--- /dev/null
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/application/model/Reactions.kt
@@ -0,0 +1,28 @@
+package dev.usbharu.hideout.core.application.model
+
+import dev.usbharu.hideout.core.domain.model.emoji.CustomEmoji
+import dev.usbharu.hideout.core.domain.model.reaction.Reaction
+import java.net.URI
+
+data class Reactions(
+    val postId: Long,
+    val count: Int,
+    val name: String,
+    val domain: String,
+    val url: URI?,
+    val actorIds: List<Long>,
+) {
+    companion object {
+        fun of(reactionList: List<Reaction>, customEmoji: CustomEmoji?): Reactions {
+            val first = reactionList.first()
+            return Reactions(
+                first.id.value,
+                reactionList.size,
+                customEmoji?.name ?: first.unicodeEmoji.name,
+                customEmoji?.domain?.domain ?: first.unicodeEmoji.domain.domain,
+                customEmoji?.url,
+                reactionList.map { it.actorId.id }
+            )
+        }
+    }
+}
diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/application/post/GetPostDetailApplicationService.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/application/post/GetPostDetailApplicationService.kt
index 7eb38ed3..278c0afe 100644
--- a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/application/post/GetPostDetailApplicationService.kt
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/application/post/GetPostDetailApplicationService.kt
@@ -9,8 +9,10 @@ import dev.usbharu.hideout.core.domain.model.media.Media
 import dev.usbharu.hideout.core.domain.model.media.MediaRepository
 import dev.usbharu.hideout.core.domain.model.post.PostId
 import dev.usbharu.hideout.core.domain.model.post.PostRepository
+import dev.usbharu.hideout.core.domain.model.reaction.ReactionRepository
 import dev.usbharu.hideout.core.domain.model.support.principal.Principal
 import dev.usbharu.hideout.core.domain.service.post.IPostReadAccessControl
+import dev.usbharu.hideout.core.query.reactions.ReactionsQueryService
 import org.slf4j.LoggerFactory
 import org.springframework.stereotype.Service
 
@@ -20,7 +22,9 @@ class GetPostDetailApplicationService(
     private val postRepository: PostRepository,
     private val actorRepository: ActorRepository,
     private val mediaRepository: MediaRepository,
-    private val iPostReadAccessControl: IPostReadAccessControl
+    private val iPostReadAccessControl: IPostReadAccessControl,
+    private val reactionsQueryService: ReactionsQueryService,
+    private val reactionRepository: ReactionRepository,
 ) : AbstractApplicationService<GetPostDetail, PostDetail>(
     transaction,
     logger
@@ -38,6 +42,15 @@ class GetPostDetailApplicationService(
 
         val mediaList = mediaRepository.findByIds(post.mediaIds)
 
+        val reactions = reactionsQueryService.findAllByPostId(post.id)
+
+        val favourited = reactionRepository.existsByPostIdAndActorIdAndCustomEmojiIdOrUnicodeEmoji(
+            post.id,
+            principal.actorId,
+            null,
+            "❤"
+        )
+
         return PostDetail.of(
             post = post,
             actor = actor,
@@ -46,6 +59,8 @@ class GetPostDetailApplicationService(
             reply = post.replyId?.let { fetchChild(it, actor, iconMedia, principal) },
             repost = post.repostId?.let { fetchChild(it, actor, iconMedia, principal) },
             moveTo = post.moveTo?.let { fetchChild(it, actor, iconMedia, principal) },
+            reactionsList = reactions,
+            favourited
         )
     }
 
@@ -69,10 +84,12 @@ class GetPostDetailApplicationService(
 
         val mediaList = mediaRepository.findByIds(post.mediaIds)
         return PostDetail.of(
-            post,
-            first,
-            third,
-            mediaList
+            post = post,
+            actor = first,
+            iconMedia = third,
+            mediaList = mediaList,
+            reactionsList = emptyList(),
+            favourited = false
         )
     }
 
diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/application/post/PostDetail.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/application/post/PostDetail.kt
index 567848df..67dd9d96 100644
--- a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/application/post/PostDetail.kt
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/application/post/PostDetail.kt
@@ -1,5 +1,6 @@
 package dev.usbharu.hideout.core.application.post
 
+import dev.usbharu.hideout.core.application.model.Reactions
 import dev.usbharu.hideout.core.domain.model.actor.Actor
 import dev.usbharu.hideout.core.domain.model.media.Media
 import dev.usbharu.hideout.core.domain.model.post.Post
@@ -23,7 +24,9 @@ data class PostDetail(
     val sensitive: Boolean,
     val deleted: Boolean,
     val mediaDetailList: List<MediaDetail>,
-    val moveTo: PostDetail?
+    val moveTo: PostDetail?,
+    val reactionsList: List<Reactions>,
+    val favourited: Boolean
 ) {
     companion object {
         @Suppress("LongParameterList")
@@ -35,6 +38,8 @@ data class PostDetail(
             reply: PostDetail? = null,
             repost: PostDetail? = null,
             moveTo: PostDetail? = null,
+            reactionsList: List<Reactions>,
+            favourited: Boolean
         ): PostDetail {
             return PostDetail(
                 id = post.id.id,
@@ -52,7 +57,9 @@ data class PostDetail(
                 sensitive = post.sensitive,
                 deleted = false,
                 mediaDetailList = mediaList.map { MediaDetail.of(it) },
-                moveTo = moveTo
+                moveTo = moveTo,
+                reactionsList = reactionsList,
+                favourited = favourited
             )
         }
     }
diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/application/reaction/CreateReaction.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/application/reaction/CreateReaction.kt
new file mode 100644
index 00000000..7d6f171b
--- /dev/null
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/application/reaction/CreateReaction.kt
@@ -0,0 +1,3 @@
+package dev.usbharu.hideout.core.application.reaction
+
+data class CreateReaction(val postId: Long, val customEmojiId: Long?, val unicodeEmoji: String)
diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/application/reaction/RemoveReaction.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/application/reaction/RemoveReaction.kt
new file mode 100644
index 00000000..6a7dd7ff
--- /dev/null
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/application/reaction/RemoveReaction.kt
@@ -0,0 +1,7 @@
+package dev.usbharu.hideout.core.application.reaction
+
+data class RemoveReaction(
+    val postId: Long,
+    val customEmojiId: Long?,
+    val unicodeEmoji: String
+)
diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/application/reaction/UserCreateReactionApplicationService.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/application/reaction/UserCreateReactionApplicationService.kt
new file mode 100644
index 00000000..f0a7f2dd
--- /dev/null
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/application/reaction/UserCreateReactionApplicationService.kt
@@ -0,0 +1,65 @@
+package dev.usbharu.hideout.core.application.reaction
+
+import dev.usbharu.hideout.core.application.exception.PermissionDeniedException
+import dev.usbharu.hideout.core.application.shared.LocalUserAbstractApplicationService
+import dev.usbharu.hideout.core.application.shared.Transaction
+import dev.usbharu.hideout.core.domain.model.emoji.CustomEmojiRepository
+import dev.usbharu.hideout.core.domain.model.emoji.UnicodeEmoji
+import dev.usbharu.hideout.core.domain.model.post.PostId
+import dev.usbharu.hideout.core.domain.model.post.PostRepository
+import dev.usbharu.hideout.core.domain.model.reaction.Reaction
+import dev.usbharu.hideout.core.domain.model.reaction.ReactionId
+import dev.usbharu.hideout.core.domain.model.reaction.ReactionRepository
+import dev.usbharu.hideout.core.domain.model.support.principal.LocalUser
+import dev.usbharu.hideout.core.domain.service.emoji.UnicodeEmojiService
+import dev.usbharu.hideout.core.domain.service.post.IPostReadAccessControl
+import dev.usbharu.hideout.core.domain.shared.id.IdGenerateService
+import org.slf4j.LoggerFactory
+import org.springframework.stereotype.Service
+import java.time.Instant
+
+@Service
+class UserCreateReactionApplicationService(
+    transaction: Transaction,
+    private val idGenerateService: IdGenerateService,
+    private val reactionRepository: ReactionRepository,
+    private val postReadAccessControl: IPostReadAccessControl,
+    private val postRepository: PostRepository,
+    private val customEmojiRepository: CustomEmojiRepository,
+    private val unicodeEmojiService: UnicodeEmojiService
+) :
+    LocalUserAbstractApplicationService<CreateReaction, Unit>(
+        transaction,
+        logger
+    ) {
+    override suspend fun internalExecute(command: CreateReaction, principal: LocalUser) {
+        val postId = PostId(command.postId)
+        val post = postRepository.findById(postId) ?: throw IllegalArgumentException("Post $postId not found.")
+        if (postReadAccessControl.isAllow(post, principal).not()) {
+            throw PermissionDeniedException()
+        }
+
+        val customEmoji = command.customEmojiId?.let { customEmojiRepository.findById(it) }
+
+        val unicodeEmoji = if (unicodeEmojiService.isUnicodeEmoji(command.unicodeEmoji)) {
+            command.unicodeEmoji
+        } else {
+            "❤"
+        }
+
+        val reaction = Reaction.create(
+            id = ReactionId(idGenerateService.generateId()),
+            postId = postId,
+            actorId = principal.actorId,
+            customEmojiId = customEmoji?.id,
+            unicodeEmoji = UnicodeEmoji(unicodeEmoji),
+            createdAt = Instant.now()
+        )
+
+        reactionRepository.save(reaction)
+    }
+
+    companion object {
+        private val logger = LoggerFactory.getLogger(UserCreateReactionApplicationService::class.java)
+    }
+}
diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/application/reaction/UserRemoveReactionApplicationService.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/application/reaction/UserRemoveReactionApplicationService.kt
new file mode 100644
index 00000000..4335ee63
--- /dev/null
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/application/reaction/UserRemoveReactionApplicationService.kt
@@ -0,0 +1,51 @@
+package dev.usbharu.hideout.core.application.reaction
+
+import dev.usbharu.hideout.core.application.shared.LocalUserAbstractApplicationService
+import dev.usbharu.hideout.core.application.shared.Transaction
+import dev.usbharu.hideout.core.domain.model.emoji.CustomEmojiRepository
+import dev.usbharu.hideout.core.domain.model.post.PostId
+import dev.usbharu.hideout.core.domain.model.reaction.ReactionRepository
+import dev.usbharu.hideout.core.domain.model.support.principal.LocalUser
+import dev.usbharu.hideout.core.domain.service.emoji.UnicodeEmojiService
+import org.slf4j.LoggerFactory
+import org.springframework.stereotype.Service
+
+@Service
+class UserRemoveReactionApplicationService(
+    transaction: Transaction,
+    private val customEmojiRepository: CustomEmojiRepository,
+    private val reactionRepository: ReactionRepository,
+    private val unicodeEmojiService: UnicodeEmojiService
+) :
+    LocalUserAbstractApplicationService<RemoveReaction, Unit>(
+        transaction,
+        logger
+    ) {
+    override suspend fun internalExecute(command: RemoveReaction, principal: LocalUser) {
+        val postId = PostId(command.postId)
+
+        val customEmoji = command.customEmojiId?.let { customEmojiRepository.findById(it) }
+
+        val unicodeEmoji = if (unicodeEmojiService.isUnicodeEmoji(command.unicodeEmoji)) {
+            command.unicodeEmoji
+        } else {
+            "❤"
+        }
+        val reaction =
+            reactionRepository.findByPostIdAndActorIdAndCustomEmojiIdOrUnicodeEmoji(
+                postId,
+                principal.actorId,
+                customEmoji?.id,
+                unicodeEmoji
+            )
+                ?: throw IllegalArgumentException("Reaction $postId ${principal.actorId} ${customEmoji?.id} $unicodeEmoji not found.")
+
+        reaction.delete()
+
+        reactionRepository.delete(reaction)
+    }
+
+    companion object {
+        private val logger = LoggerFactory.getLogger(UserRemoveReactionApplicationService::class.java)
+    }
+}
diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/application/timeline/ReadTimelineApplicationService.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/application/timeline/ReadTimelineApplicationService.kt
index 9facf26c..8b045657 100644
--- a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/application/timeline/ReadTimelineApplicationService.kt
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/application/timeline/ReadTimelineApplicationService.kt
@@ -47,7 +47,9 @@ class ReadTimelineApplicationService(
                     it.replyPost,
                     it.replyPostActor!!,
                     it.replyPostActorIconMedia,
-                    it.replyPostMedias.orEmpty()
+                    it.replyPostMedias.orEmpty(),
+                    reactionsList = emptyList(),
+                    favourited = false,
                 )
             } else {
                 null
@@ -56,10 +58,12 @@ class ReadTimelineApplicationService(
             val repost = if (it.repostPost != null) {
                 @Suppress("UnsafeCallOnNullableType")
                 PostDetail.of(
-                    it.repostPost,
-                    it.repostPostActor!!,
-                    it.repostPostActorIconMedia,
-                    it.repostPostMedias.orEmpty()
+                    post = it.repostPost,
+                    actor = it.repostPostActor!!,
+                    iconMedia = it.repostPostActorIconMedia,
+                    mediaList = it.repostPostMedias.orEmpty(),
+                    reactionsList = emptyList(),
+                    favourited = false
                 )
             } else {
                 null
@@ -71,7 +75,9 @@ class ReadTimelineApplicationService(
                 iconMedia = it.postActorIconMedia,
                 mediaList = it.postMedias,
                 reply = reply,
-                repost = repost
+                repost = repost,
+                reactionsList = emptyList(),
+                favourited = it.favourited
             )
         }
 
diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/event/reaction/ReactionEvent.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/event/reaction/ReactionEvent.kt
new file mode 100644
index 00000000..6da7a58c
--- /dev/null
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/event/reaction/ReactionEvent.kt
@@ -0,0 +1,22 @@
+package dev.usbharu.hideout.core.domain.event.reaction
+
+import dev.usbharu.hideout.core.domain.model.reaction.Reaction
+import dev.usbharu.hideout.core.domain.model.reaction.ReactionId
+import dev.usbharu.hideout.core.domain.shared.domainevent.DomainEvent
+import dev.usbharu.hideout.core.domain.shared.domainevent.DomainEventBody
+
+class ReactionEventFactory(private val reaction: Reaction) {
+    fun createEvent(reactionEvent: ReactionEvent): DomainEvent<ReactionEventBody> =
+        DomainEvent.create(reactionEvent.eventName, ReactionEventBody(reaction))
+}
+
+class ReactionEventBody(
+    reaction: Reaction
+) : DomainEventBody(mapOf("reactionId" to reaction.id)) {
+    fun getReactionId(): ReactionId = toMap()["reactionId"] as ReactionId
+}
+
+enum class ReactionEvent(val eventName: String) {
+    CREATE("ReactionCreate"),
+    DELETE("ReactionDelete"),
+}
diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/actor/Actor.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/actor/Actor.kt
index 3b282c34..8fd41710 100644
--- a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/actor/Actor.kt
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/actor/Actor.kt
@@ -18,7 +18,7 @@ package dev.usbharu.hideout.core.domain.model.actor
 
 import dev.usbharu.hideout.core.domain.event.actor.ActorDomainEventFactory
 import dev.usbharu.hideout.core.domain.event.actor.ActorEvent.*
-import dev.usbharu.hideout.core.domain.model.emoji.EmojiId
+import dev.usbharu.hideout.core.domain.model.emoji.CustomEmojiId
 import dev.usbharu.hideout.core.domain.model.instance.InstanceId
 import dev.usbharu.hideout.core.domain.model.media.MediaId
 import dev.usbharu.hideout.core.domain.model.support.domain.Domain
@@ -52,7 +52,7 @@ class Actor(
     var lastUpdateAt: Instant = createdAt,
     alsoKnownAs: Set<ActorId> = emptySet(),
     moveTo: ActorId? = null,
-    emojiIds: Set<EmojiId>,
+    emojiIds: Set<CustomEmojiId>,
     deleted: Boolean,
     icon: MediaId?,
     banner: MediaId?,
diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/emoji/CustomEmoji.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/emoji/CustomEmoji.kt
index e0e29b17..b80d06cf 100644
--- a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/emoji/CustomEmoji.kt
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/emoji/CustomEmoji.kt
@@ -36,7 +36,7 @@ sealed class Emoji {
 }
 
 data class CustomEmoji(
-    val id: EmojiId,
+    val id: CustomEmojiId,
     override val name: String,
     override val domain: Domain,
     val instanceId: InstanceId,
@@ -50,6 +50,10 @@ data class CustomEmoji(
 data class UnicodeEmoji(
     override val name: String
 ) : Emoji() {
-    override val domain: Domain = Domain("unicode.org")
+    override val domain: Domain = Companion.domain
     override fun id(): String = name
+
+    companion object {
+        val domain = Domain("unicode.org")
+    }
 }
diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/emoji/EmojiId.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/emoji/CustomEmojiId.kt
similarity index 93%
rename from hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/emoji/EmojiId.kt
rename to hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/emoji/CustomEmojiId.kt
index 5cf4284d..6ad2ec03 100644
--- a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/emoji/EmojiId.kt
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/emoji/CustomEmojiId.kt
@@ -17,7 +17,7 @@
 package dev.usbharu.hideout.core.domain.model.emoji
 
 @JvmInline
-value class EmojiId(val emojiId: Long) {
+value class CustomEmojiId(val emojiId: Long) {
     init {
         require(0 <= emojiId)
     }
diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/post/Post.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/post/Post.kt
index b953bd8e..db5f2732 100644
--- a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/post/Post.kt
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/post/Post.kt
@@ -20,7 +20,7 @@ import dev.usbharu.hideout.core.domain.event.post.PostDomainEventFactory
 import dev.usbharu.hideout.core.domain.event.post.PostEvent
 import dev.usbharu.hideout.core.domain.model.actor.Actor
 import dev.usbharu.hideout.core.domain.model.actor.ActorId
-import dev.usbharu.hideout.core.domain.model.emoji.EmojiId
+import dev.usbharu.hideout.core.domain.model.emoji.CustomEmojiId
 import dev.usbharu.hideout.core.domain.model.instance.InstanceId
 import dev.usbharu.hideout.core.domain.model.media.MediaId
 import dev.usbharu.hideout.core.domain.shared.domainevent.DomainEventStorable
@@ -138,7 +138,7 @@ class Post(
             return content.text
         }
 
-    val emojiIds: List<EmojiId>
+    val emojiIds: List<CustomEmojiId>
         get() {
             if (hide) {
                 return PostContent.empty.emojiIds
@@ -217,7 +217,7 @@ class Post(
 
     override fun hashCode(): Int = id.hashCode()
 
-    fun reconstructWith(mediaIds: List<MediaId>, emojis: List<EmojiId>, visibleActors: Set<ActorId>): Post {
+    fun reconstructWith(mediaIds: List<MediaId>, emojis: List<CustomEmojiId>, visibleActors: Set<ActorId>): Post {
         return Post(
             id = id,
             actorId = actorId,
diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/post/PostContent.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/post/PostContent.kt
index 2d787e75..9f6b2db7 100644
--- a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/post/PostContent.kt
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/post/PostContent.kt
@@ -16,9 +16,9 @@
 
 package dev.usbharu.hideout.core.domain.model.post
 
-import dev.usbharu.hideout.core.domain.model.emoji.EmojiId
+import dev.usbharu.hideout.core.domain.model.emoji.CustomEmojiId
 
-data class PostContent(val text: String, val content: String, val emojiIds: List<EmojiId>) {
+data class PostContent(val text: String, val content: String, val emojiIds: List<CustomEmojiId>) {
 
     companion object {
         val empty = PostContent("", "", emptyList())
diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/reaction/Reaction.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/reaction/Reaction.kt
new file mode 100644
index 00000000..c85c061d
--- /dev/null
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/reaction/Reaction.kt
@@ -0,0 +1,57 @@
+package dev.usbharu.hideout.core.domain.model.reaction
+
+import dev.usbharu.hideout.core.domain.event.reaction.ReactionEvent
+import dev.usbharu.hideout.core.domain.event.reaction.ReactionEventFactory
+import dev.usbharu.hideout.core.domain.model.actor.ActorId
+import dev.usbharu.hideout.core.domain.model.emoji.CustomEmojiId
+import dev.usbharu.hideout.core.domain.model.emoji.UnicodeEmoji
+import dev.usbharu.hideout.core.domain.model.post.PostId
+import dev.usbharu.hideout.core.domain.shared.domainevent.DomainEventStorable
+import java.time.Instant
+
+class Reaction(
+    val id: ReactionId,
+    val postId: PostId,
+    val actorId: ActorId,
+    val customEmojiId: CustomEmojiId?,
+    val unicodeEmoji: UnicodeEmoji,
+    val createdAt: Instant
+) : DomainEventStorable() {
+
+    override fun equals(other: Any?): Boolean {
+        if (this === other) return true
+        if (javaClass != other?.javaClass) return false
+
+        other as Reaction
+
+        return id == other.id
+    }
+
+    override fun hashCode(): Int {
+        return id.hashCode()
+    }
+
+    fun delete() {
+        addDomainEvent(ReactionEventFactory(this).createEvent(ReactionEvent.DELETE))
+    }
+
+    companion object {
+        fun create(
+            id: ReactionId,
+            postId: PostId,
+            actorId: ActorId,
+            customEmojiId: CustomEmojiId?,
+            unicodeEmoji: UnicodeEmoji,
+            createdAt: Instant
+        ): Reaction {
+            return Reaction(
+                id,
+                postId,
+                actorId,
+                customEmojiId,
+                unicodeEmoji,
+                createdAt
+            ).apply { addDomainEvent(ReactionEventFactory(this).createEvent(ReactionEvent.CREATE)) }
+        }
+    }
+}
diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/reaction/ReactionId.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/reaction/ReactionId.kt
new file mode 100644
index 00000000..948fb1ea
--- /dev/null
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/reaction/ReactionId.kt
@@ -0,0 +1,4 @@
+package dev.usbharu.hideout.core.domain.model.reaction
+
+@JvmInline
+value class ReactionId(val value: Long)
diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/reaction/ReactionRepository.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/reaction/ReactionRepository.kt
new file mode 100644
index 00000000..01e893a7
--- /dev/null
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/reaction/ReactionRepository.kt
@@ -0,0 +1,26 @@
+package dev.usbharu.hideout.core.domain.model.reaction
+
+import dev.usbharu.hideout.core.domain.model.actor.ActorId
+import dev.usbharu.hideout.core.domain.model.emoji.CustomEmojiId
+import dev.usbharu.hideout.core.domain.model.post.PostId
+
+interface ReactionRepository {
+    suspend fun save(reaction: Reaction): Reaction
+    suspend fun findById(reactionId: ReactionId): Reaction?
+    suspend fun findByPostId(postId: PostId): List<Reaction>
+    suspend fun existsByPostIdAndActorIdAndCustomEmojiIdOrUnicodeEmoji(
+        postId: PostId,
+        actorId: ActorId,
+        customEmojiId: CustomEmojiId?,
+        unicodeEmoji: String
+    ): Boolean
+
+    suspend fun findByPostIdAndActorIdAndCustomEmojiIdOrUnicodeEmoji(
+        postId: PostId,
+        actorId: ActorId,
+        customEmojiId: CustomEmojiId?,
+        unicodeEmoji: String
+    ): Reaction?
+
+    suspend fun delete(reaction: Reaction)
+}
diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/support/timelineobjectdetail/TimelineObjectDetail.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/support/timelineobjectdetail/TimelineObjectDetail.kt
index 830612dc..43b0fa9f 100644
--- a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/support/timelineobjectdetail/TimelineObjectDetail.kt
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/support/timelineobjectdetail/TimelineObjectDetail.kt
@@ -1,5 +1,6 @@
 package dev.usbharu.hideout.core.domain.model.support.timelineobjectdetail
 
+import dev.usbharu.hideout.core.application.model.Reactions
 import dev.usbharu.hideout.core.domain.model.actor.Actor
 import dev.usbharu.hideout.core.domain.model.media.Media
 import dev.usbharu.hideout.core.domain.model.post.Post
@@ -29,7 +30,9 @@ data class TimelineObjectDetail(
     val isPureRepost: Boolean,
     val lastUpdateAt: Instant,
     val hasMediaInRepost: Boolean,
-    val warnFilter: List<TimelineObjectWarnFilter>
+    val warnFilter: List<TimelineObjectWarnFilter>,
+    val reactionsList: List<Reactions>,
+    val favourited: Boolean
 ) {
     companion object {
         @Suppress("LongParameterList")
@@ -48,7 +51,9 @@ data class TimelineObjectDetail(
             repostPostMedias: List<Media>?,
             repostPostActor: Actor?,
             repostPostActorIconMedia: Media?,
-            warnFilter: List<TimelineObjectWarnFilter>
+            warnFilter: List<TimelineObjectWarnFilter>,
+            reactionsList: List<Reactions>,
+            favourited: Boolean
         ): TimelineObjectDetail {
             return TimelineObjectDetail(
                 id = timelineObject.id,
@@ -69,7 +74,9 @@ data class TimelineObjectDetail(
                 isPureRepost = timelineObject.isPureRepost,
                 lastUpdateAt = timelineObject.lastUpdatedAt,
                 hasMediaInRepost = timelineObject.hasMediaInRepost,
-                warnFilter = warnFilter
+                warnFilter = warnFilter,
+                reactionsList = reactionsList,
+                favourited = favourited
             )
         }
     }
diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/timelineobject/TimelineObject.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/timelineobject/TimelineObject.kt
index bdce1a0d..f7f57f22 100644
--- a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/timelineobject/TimelineObject.kt
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/timelineobject/TimelineObject.kt
@@ -1,7 +1,7 @@
 package dev.usbharu.hideout.core.domain.model.timelineobject
 
 import dev.usbharu.hideout.core.domain.model.actor.ActorId
-import dev.usbharu.hideout.core.domain.model.emoji.EmojiId
+import dev.usbharu.hideout.core.domain.model.emoji.CustomEmojiId
 import dev.usbharu.hideout.core.domain.model.filter.FilterResult
 import dev.usbharu.hideout.core.domain.model.media.MediaId
 import dev.usbharu.hideout.core.domain.model.post.Post
@@ -28,12 +28,12 @@ class TimelineObject(
     visibility: Visibility,
     isPureRepost: Boolean,
     mediaIds: List<MediaId>,
-    emojiIds: List<EmojiId>,
+    emojiIds: List<CustomEmojiId>,
     visibleActors: List<ActorId>,
     hasMediaInRepost: Boolean,
     lastUpdatedAt: Instant,
     var warnFilters: List<TimelineObjectWarnFilter>,
-
+    var favourited: Boolean
 ) {
     var isPureRepost = isPureRepost
         private set
@@ -82,7 +82,8 @@ class TimelineObject(
             timeline: Timeline,
             post: Post,
             replyActorId: ActorId?,
-            filterResults: List<FilterResult>
+            filterResults: List<FilterResult>,
+            favourited: Boolean
         ): TimelineObject {
             return TimelineObject(
                 id = timelineObjectId,
@@ -102,7 +103,8 @@ class TimelineObject(
                 visibleActors = post.visibleActors.toList(),
                 hasMediaInRepost = false,
                 lastUpdatedAt = Instant.now(),
-                warnFilters = filterResults.map { TimelineObjectWarnFilter(it.filter.id, it.matchedKeyword) }
+                warnFilters = filterResults.map { TimelineObjectWarnFilter(it.filter.id, it.matchedKeyword) },
+                favourited = favourited
             )
         }
 
@@ -113,7 +115,8 @@ class TimelineObject(
             post: Post,
             replyActorId: ActorId?,
             repost: Post,
-            filterResults: List<FilterResult>
+            filterResults: List<FilterResult>,
+            favourited: Boolean
         ): TimelineObject {
             require(post.repostId == repost.id)
 
@@ -138,7 +141,8 @@ class TimelineObject(
                 visibleActors = post.visibleActors.toList(),
                 hasMediaInRepost = repost.mediaIds.isNotEmpty(),
                 lastUpdatedAt = Instant.now(),
-                warnFilters = filterResults.map { TimelineObjectWarnFilter(it.filter.id, it.matchedKeyword) }
+                warnFilters = filterResults.map { TimelineObjectWarnFilter(it.filter.id, it.matchedKeyword) },
+                favourited = favourited
             )
         }
     }
diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/service/emoji/UnicodeEmojiService.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/service/emoji/UnicodeEmojiService.kt
new file mode 100644
index 00000000..35a44ca5
--- /dev/null
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/service/emoji/UnicodeEmojiService.kt
@@ -0,0 +1,5 @@
+package dev.usbharu.hideout.core.domain.service.emoji
+
+interface UnicodeEmojiService {
+    fun isUnicodeEmoji(emoji: String): Boolean
+}
diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/emojikt/EmojiKtUnicodeEmojiService.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/emojikt/EmojiKtUnicodeEmojiService.kt
new file mode 100644
index 00000000..3e0fdc43
--- /dev/null
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/emojikt/EmojiKtUnicodeEmojiService.kt
@@ -0,0 +1,12 @@
+package dev.usbharu.hideout.core.infrastructure.emojikt
+
+import Emojis
+import dev.usbharu.hideout.core.domain.service.emoji.UnicodeEmojiService
+import org.springframework.stereotype.Service
+
+@Service
+class EmojiKtUnicodeEmojiService : UnicodeEmojiService {
+    override fun isUnicodeEmoji(emoji: String): Boolean {
+        return Emojis.allEmojis.singleOrNull { it.char == emoji } != null
+    }
+}
diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/exposed/ActorResultRowMapper.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/exposed/ActorResultRowMapper.kt
index 59cb72fc..c552c541 100644
--- a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/exposed/ActorResultRowMapper.kt
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/exposed/ActorResultRowMapper.kt
@@ -17,7 +17,7 @@
 package dev.usbharu.hideout.core.infrastructure.exposed
 
 import dev.usbharu.hideout.core.domain.model.actor.*
-import dev.usbharu.hideout.core.domain.model.emoji.EmojiId
+import dev.usbharu.hideout.core.domain.model.emoji.CustomEmojiId
 import dev.usbharu.hideout.core.domain.model.instance.InstanceId
 import dev.usbharu.hideout.core.domain.model.media.MediaId
 import dev.usbharu.hideout.core.domain.model.support.domain.Domain
@@ -57,7 +57,7 @@ class ActorResultRowMapper : ResultRowMapper<Actor> {
             emojiIds = resultRow[Actors.emojis]
                 .split(",")
                 .filter { it.isNotEmpty() }
-                .map { EmojiId(it.toLong()) }
+                .map { CustomEmojiId(it.toLong()) }
                 .toSet(),
             deleted = resultRow[Actors.deleted],
             icon = resultRow[Actors.icon]?.let { MediaId(it) },
diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/exposed/PostQueryMapper.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/exposed/PostQueryMapper.kt
index 653533ed..139bd86c 100644
--- a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/exposed/PostQueryMapper.kt
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/exposed/PostQueryMapper.kt
@@ -17,7 +17,7 @@
 package dev.usbharu.hideout.core.infrastructure.exposed
 
 import dev.usbharu.hideout.core.domain.model.actor.ActorId
-import dev.usbharu.hideout.core.domain.model.emoji.EmojiId
+import dev.usbharu.hideout.core.domain.model.emoji.CustomEmojiId
 import dev.usbharu.hideout.core.domain.model.media.MediaId
 import dev.usbharu.hideout.core.domain.model.post.Post
 import dev.usbharu.hideout.core.infrastructure.exposedrepository.Posts
@@ -55,7 +55,7 @@ class PostQueryMapper(private val postResultRowMapper: ResultRowMapper<Post>) :
                 .mapNotNull { resultRow: ResultRow ->
                     resultRow
                         .getOrNull(PostsEmojis.emojiId)
-                        ?.let { emojiId -> EmojiId(emojiId) }
+                        ?.let { emojiId -> CustomEmojiId(emojiId) }
                 },
             visibleActors = it.mapNotNull { resultRow: ResultRow ->
                 resultRow
diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/exposedquery/ExposedReactionsQueryService.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/exposedquery/ExposedReactionsQueryService.kt
new file mode 100644
index 00000000..d22184e7
--- /dev/null
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/exposedquery/ExposedReactionsQueryService.kt
@@ -0,0 +1,73 @@
+package dev.usbharu.hideout.core.infrastructure.exposedquery
+
+import dev.usbharu.hideout.core.application.model.Reactions
+import dev.usbharu.hideout.core.domain.model.emoji.UnicodeEmoji
+import dev.usbharu.hideout.core.domain.model.post.PostId
+import dev.usbharu.hideout.core.infrastructure.exposedrepository.AbstractRepository
+import dev.usbharu.hideout.core.infrastructure.exposedrepository.CustomEmojis
+import dev.usbharu.hideout.core.infrastructure.exposedrepository.toCustomEmojiOrNull
+import dev.usbharu.hideout.core.infrastructure.exposedrepository.toReaction
+import dev.usbharu.hideout.core.query.reactions.ReactionsQueryService
+import org.jetbrains.exposed.sql.*
+import org.slf4j.Logger
+import org.slf4j.LoggerFactory
+import org.springframework.stereotype.Repository
+import java.net.URI
+import dev.usbharu.hideout.core.infrastructure.exposedrepository.Reactions as ExposedrepositoryReactions
+
+@Repository
+class ExposedReactionsQueryService : ReactionsQueryService, AbstractRepository() {
+    override suspend fun findAllByPostId(postId: PostId): List<Reactions> {
+        return query {
+            ExposedrepositoryReactions.leftJoin(CustomEmojis).selectAll()
+                .where { ExposedrepositoryReactions.postId eq postId.id }
+                .groupBy {
+                    it[ExposedrepositoryReactions.customEmojiId]?.toString()
+                        ?: it[ExposedrepositoryReactions.unicodeEmoji]
+                }
+                .map { it.value }
+                .map {
+                    Reactions.of(
+                        it.map { resultRow -> resultRow.toReaction() },
+                        it.first().toCustomEmojiOrNull()
+                    )
+                }
+        }
+    }
+
+    override suspend fun findAllByPostIdIn(postIds: List<PostId>): List<Reactions> {
+        return query {
+            val actorIdsQuery =
+                ExposedrepositoryReactions.actorId.castTo<String>(VarCharColumnType()).groupConcat(",", true)
+
+            ExposedrepositoryReactions.leftJoin(CustomEmojis)
+                .select(
+                    ExposedrepositoryReactions.postId,
+                    ExposedrepositoryReactions.postId.count(),
+                    ExposedrepositoryReactions.customEmojiId.max(),
+                    ExposedrepositoryReactions.unicodeEmoji.max<String, String>(),
+                    actorIdsQuery
+                )
+                .where { ExposedrepositoryReactions.postId inList postIds.map { it.id } }
+                .groupBy(ExposedrepositoryReactions.postId)
+                .map {
+                    Reactions(
+                        it[ExposedrepositoryReactions.postId],
+                        it[ExposedrepositoryReactions.postId.count()].toInt(),
+                        it.getOrNull(CustomEmojis.name)
+                            ?: it[ExposedrepositoryReactions.unicodeEmoji.max<String, String>()]!!,
+                        it.getOrNull(CustomEmojis.domain) ?: UnicodeEmoji.domain.domain,
+                        it.getOrNull(CustomEmojis.url)?.let { it1 -> URI.create(it1) },
+                        it[actorIdsQuery].split(",").mapNotNull { it.toLongOrNull() }
+                    )
+                }
+        }
+    }
+
+    override val logger: Logger
+        get() = Companion.logger
+
+    companion object {
+        private val logger = LoggerFactory.getLogger(ExposedReactionsQueryService::class.java)
+    }
+}
diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/exposedquery/ExposedUserTimelineQueryService.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/exposedquery/ExposedUserTimelineQueryService.kt
index 82be6f96..db3fb0f2 100644
--- a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/exposedquery/ExposedUserTimelineQueryService.kt
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/exposedquery/ExposedUserTimelineQueryService.kt
@@ -61,6 +61,12 @@ class ExposedUserTimelineQueryService : UserTimelineQueryService, AbstractReposi
             .leftJoin(iconMedia, { Actors.icon }, { iconMedia[Media.id] })
             .leftJoin(PostsMedia, { authorizedQuery[Posts.id] }, { PostsMedia.postId })
             .leftJoin(Media, { PostsMedia.mediaId }, { Media.id })
+            .leftJoin(
+                Reactions,
+                { authorizedQuery[Posts.id] },
+                { Reactions.postId },
+                { Reactions.id isDistinctFrom principal.actorId.id }
+            )
             .selectAll()
             .where { authorizedQuery[Posts.id] inList idList.map { it.id } }
             .groupBy { it[authorizedQuery[Posts.id]] }
@@ -69,7 +75,8 @@ class ExposedUserTimelineQueryService : UserTimelineQueryService, AbstractReposi
                 toPostDetail(it.first(), authorizedQuery, iconMedia).copy(
                     mediaDetailList = it.mapNotNull { resultRow ->
                         resultRow.toMediaOrNull()?.let { it1 -> MediaDetail.of(it1) }
-                    }
+                    },
+                    favourited = it.any { it.getOrNull(Reactions.actorId) != null }
                 )
             }
     }
@@ -100,7 +107,9 @@ class ExposedUserTimelineQueryService : UserTimelineQueryService, AbstractReposi
             sensitive = it[authorizedQuery[Posts.sensitive]],
             deleted = it[authorizedQuery[Posts.deleted]],
             mediaDetailList = emptyList(),
-            moveTo = null
+            moveTo = null,
+            emptyList(),
+            favourited = false
         )
     }
 
diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/exposedrepository/CustomEmojiRepositoryImpl.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/exposedrepository/CustomEmojiRepositoryImpl.kt
index c095ae55..e3ca9079 100644
--- a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/exposedrepository/CustomEmojiRepositoryImpl.kt
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/exposedrepository/CustomEmojiRepositoryImpl.kt
@@ -17,8 +17,8 @@
 package dev.usbharu.hideout.core.infrastructure.exposedrepository
 
 import dev.usbharu.hideout.core.domain.model.emoji.CustomEmoji
+import dev.usbharu.hideout.core.domain.model.emoji.CustomEmojiId
 import dev.usbharu.hideout.core.domain.model.emoji.CustomEmojiRepository
-import dev.usbharu.hideout.core.domain.model.emoji.EmojiId
 import dev.usbharu.hideout.core.domain.model.instance.InstanceId
 import dev.usbharu.hideout.core.domain.model.support.domain.Domain
 import org.jetbrains.exposed.sql.*
@@ -81,7 +81,7 @@ class CustomEmojiRepositoryImpl : CustomEmojiRepository,
 }
 
 fun ResultRow.toCustomEmoji(): CustomEmoji = CustomEmoji(
-    id = EmojiId(this[CustomEmojis.id]),
+    id = CustomEmojiId(this[CustomEmojis.id]),
     name = this[CustomEmojis.name],
     domain = Domain(this[CustomEmojis.domain]),
     instanceId = InstanceId(this[CustomEmojis.instanceId]),
@@ -92,7 +92,7 @@ fun ResultRow.toCustomEmoji(): CustomEmoji = CustomEmoji(
 
 fun ResultRow.toCustomEmojiOrNull(): CustomEmoji? {
     return CustomEmoji(
-        id = EmojiId(this.getOrNull(CustomEmojis.id) ?: return null),
+        id = CustomEmojiId(this.getOrNull(CustomEmojis.id) ?: return null),
         name = this.getOrNull(CustomEmojis.name) ?: return null,
         domain = Domain(this.getOrNull(CustomEmojis.domain) ?: return null),
         instanceId = InstanceId(this.getOrNull(CustomEmojis.instanceId) ?: return null),
diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/exposedrepository/ExposedPostRepository.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/exposedrepository/ExposedPostRepository.kt
index 9408d01a..37a476b1 100644
--- a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/exposedrepository/ExposedPostRepository.kt
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/exposedrepository/ExposedPostRepository.kt
@@ -168,7 +168,7 @@ class ExposedPostRepository(
                 Posts.id eq id.id
             }
             .let(postQueryMapper::map)
-            .first()
+            .firstOrNull()
     }
 
     override suspend fun findAllById(ids: List<PostId>): List<Post> {
diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/exposedrepository/ExposedReactionRepository.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/exposedrepository/ExposedReactionRepository.kt
new file mode 100644
index 00000000..d44bca1f
--- /dev/null
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/exposedrepository/ExposedReactionRepository.kt
@@ -0,0 +1,128 @@
+package dev.usbharu.hideout.core.infrastructure.exposedrepository
+
+import dev.usbharu.hideout.core.domain.model.actor.ActorId
+import dev.usbharu.hideout.core.domain.model.emoji.CustomEmojiId
+import dev.usbharu.hideout.core.domain.model.emoji.UnicodeEmoji
+import dev.usbharu.hideout.core.domain.model.post.PostId
+import dev.usbharu.hideout.core.domain.model.reaction.Reaction
+import dev.usbharu.hideout.core.domain.model.reaction.ReactionId
+import dev.usbharu.hideout.core.domain.model.reaction.ReactionRepository
+import dev.usbharu.hideout.core.domain.shared.domainevent.DomainEventPublisher
+import dev.usbharu.hideout.core.domain.shared.repository.DomainEventPublishableRepository
+import org.jetbrains.exposed.sql.*
+import org.jetbrains.exposed.sql.SqlExpressionBuilder.eq
+import org.jetbrains.exposed.sql.javatime.timestamp
+import org.slf4j.Logger
+import org.slf4j.LoggerFactory
+import org.springframework.stereotype.Repository
+
+@Repository
+class ExposedReactionRepository(override val domainEventPublisher: DomainEventPublisher) :
+    ReactionRepository,
+    AbstractRepository(),
+    DomainEventPublishableRepository<Reaction> {
+
+    override val logger: Logger
+        get() = Companion.logger
+
+    override suspend fun save(reaction: Reaction): Reaction {
+        return query {
+            Reactions.upsert {
+                it[Reactions.id] = reaction.id.value
+                it[Reactions.postId] = reaction.postId.id
+                it[Reactions.actorId] = reaction.actorId.id
+                it[Reactions.customEmojiId] = reaction.customEmojiId?.emojiId
+                it[Reactions.unicodeEmoji] = reaction.unicodeEmoji.name
+                it[Reactions.createdAt] = reaction.createdAt
+            }
+            onComplete {
+                update(reaction)
+            }
+            reaction
+        }
+    }
+
+    override suspend fun findById(reactionId: ReactionId): Reaction? {
+        return query {
+            Reactions.selectAll().where {
+                Reactions.id eq reactionId.value
+            }.singleOrNull()?.toReaction()
+        }
+    }
+
+    override suspend fun findByPostId(postId: PostId): List<Reaction> {
+        return query {
+            Reactions.selectAll().where {
+                Reactions.postId eq postId.id
+            }.map { it.toReaction() }
+        }
+    }
+
+    override suspend fun existsByPostIdAndActorIdAndCustomEmojiIdOrUnicodeEmoji(
+        postId: PostId,
+        actorId: ActorId,
+        customEmojiId: CustomEmojiId?,
+        unicodeEmoji: String
+    ): Boolean {
+        return query {
+            Reactions.selectAll().where {
+                Reactions.postId.eq(postId.id).and(Reactions.actorId eq actorId.id)
+                    .and(
+                        (Reactions.customEmojiId eq customEmojiId?.emojiId or (Reactions.unicodeEmoji eq unicodeEmoji))
+                    )
+            }.empty().not()
+        }
+    }
+
+    override suspend fun delete(reaction: Reaction) {
+        return query {
+            Reactions.deleteWhere {
+                Reactions.id eq reaction.id.value
+            }
+            onComplete {
+                update(reaction)
+            }
+        }
+    }
+
+    override suspend fun findByPostIdAndActorIdAndCustomEmojiIdOrUnicodeEmoji(
+        postId: PostId,
+        actorId: ActorId,
+        customEmojiId: CustomEmojiId?,
+        unicodeEmoji: String
+    ): Reaction? {
+        return query {
+            Reactions.selectAll().where {
+                Reactions.postId.eq(postId.id).and(Reactions.actorId eq actorId.id)
+                    .and(
+                        (Reactions.customEmojiId eq customEmojiId?.emojiId or (Reactions.unicodeEmoji eq unicodeEmoji))
+                    )
+            }.limit(1).singleOrNull()?.toReaction()
+        }
+    }
+
+    companion object {
+        private val logger = LoggerFactory.getLogger(ExposedReactionRepository::class.java)
+    }
+}
+
+fun ResultRow.toReaction(): Reaction {
+    return Reaction(
+        ReactionId(this[Reactions.id]),
+        PostId(this[Reactions.postId]),
+        ActorId(this[Reactions.actorId]),
+        this[Reactions.customEmojiId]?.let { CustomEmojiId(it) },
+        UnicodeEmoji(this[Reactions.unicodeEmoji]),
+        this[Reactions.createdAt]
+    )
+}
+
+object Reactions : Table("reactions") {
+    val id = long("id")
+    val postId = long("post_id").references(Posts.id)
+    val actorId = long("actor_id").references(Actors.id)
+    val customEmojiId = long("custom_emoji_id").references(CustomEmojis.id).nullable()
+    val unicodeEmoji = varchar("unicode_emoji", 100)
+    val createdAt = timestamp("created_at")
+    override val primaryKey: PrimaryKey = PrimaryKey(id)
+}
diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/mongorepository/MongoInternalTimelineObjectRepository.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/mongorepository/MongoInternalTimelineObjectRepository.kt
index 1e476d0c..2e66bbbd 100644
--- a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/mongorepository/MongoInternalTimelineObjectRepository.kt
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/mongorepository/MongoInternalTimelineObjectRepository.kt
@@ -1,7 +1,7 @@
 package dev.usbharu.hideout.core.infrastructure.mongorepository
 
 import dev.usbharu.hideout.core.domain.model.actor.ActorId
-import dev.usbharu.hideout.core.domain.model.emoji.EmojiId
+import dev.usbharu.hideout.core.domain.model.emoji.CustomEmojiId
 import dev.usbharu.hideout.core.domain.model.filter.FilterId
 import dev.usbharu.hideout.core.domain.model.media.MediaId
 import dev.usbharu.hideout.core.domain.model.post.PostId
@@ -133,7 +133,8 @@ data class SpringDataMongoTimelineObject(
     val visibleActors: List<Long>,
     val hasMediaInRepost: Boolean,
     val lastUpdatedAt: Long,
-    val warnFilters: List<SpringDataMongoTimelineObjectWarnFilter>
+    val warnFilters: List<SpringDataMongoTimelineObjectWarnFilter>,
+    val favourited: Boolean
 ) {
 
     fun toTimelineObject(): TimelineObject {
@@ -151,11 +152,12 @@ data class SpringDataMongoTimelineObject(
             visibility = visibility,
             isPureRepost = isPureRepost,
             mediaIds = mediaIds.map { MediaId(it) },
-            emojiIds = emojiIds.map { EmojiId(it) },
+            emojiIds = emojiIds.map { CustomEmojiId(it) },
             visibleActors = visibleActors.map { ActorId(it) },
             hasMediaInRepost = hasMediaInRepost,
             lastUpdatedAt = Instant.ofEpochSecond(lastUpdatedAt),
-            warnFilters = warnFilters.map { it.toTimelineObjectWarnFilter() }
+            warnFilters = warnFilters.map { it.toTimelineObjectWarnFilter() },
+            favourited = favourited
         )
     }
 
@@ -179,7 +181,8 @@ data class SpringDataMongoTimelineObject(
                 visibleActors = timelineObject.visibleActors.map { it.id },
                 hasMediaInRepost = timelineObject.hasMediaInRepost,
                 lastUpdatedAt = timelineObject.lastUpdatedAt.epochSecond,
-                warnFilters = timelineObject.warnFilters.map { SpringDataMongoTimelineObjectWarnFilter.of(it) }
+                warnFilters = timelineObject.warnFilters.map { SpringDataMongoTimelineObjectWarnFilter.of(it) },
+                favourited = timelineObject.favourited
             )
         }
     }
diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/springframework/SPAInterceptor.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/springframework/SPAInterceptor.kt
index b3a6eeb0..b3d9a394 100644
--- a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/springframework/SPAInterceptor.kt
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/springframework/SPAInterceptor.kt
@@ -29,7 +29,7 @@ class SPAInterceptor : HandlerInterceptor {
             return
         }
 
-        if (request.session.getAttribute("s") == "f") {
+        if (request.getSession(false)?.getAttribute("s") == "f") {
             return
         }
 
diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/timeline/AbstractTimelineStore.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/timeline/AbstractTimelineStore.kt
index 50801dc2..b22d0121 100644
--- a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/timeline/AbstractTimelineStore.kt
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/timeline/AbstractTimelineStore.kt
@@ -1,5 +1,6 @@
 package dev.usbharu.hideout.core.infrastructure.timeline
 
+import dev.usbharu.hideout.core.application.model.Reactions
 import dev.usbharu.hideout.core.domain.model.actor.Actor
 import dev.usbharu.hideout.core.domain.model.actor.ActorId
 import dev.usbharu.hideout.core.domain.model.filter.Filter
@@ -75,7 +76,8 @@ abstract class AbstractTimelineStore(private val idGenerateService: IdGenerateSe
                 post = post,
                 replyActorId = replyActorId,
                 repost = repost,
-                filterResults = applyFilters.filterResults
+                filterResults = applyFilters.filterResults,
+                favourited = false
             )
         }
 
@@ -84,7 +86,8 @@ abstract class AbstractTimelineStore(private val idGenerateService: IdGenerateSe
             timeline = timeline,
             post = post,
             replyActorId = replyActorId,
-            filterResults = applyFilters.filterResults
+            filterResults = applyFilters.filterResults,
+            favourited = false
         )
     }
 
@@ -256,6 +259,8 @@ abstract class AbstractTimelineStore(private val idGenerateService: IdGenerateSe
                 actors.mapNotNull { it.value.icon }
         )
 
+        val reactions = getReactions(posts.map { it.id })
+
         return PaginationList(
             timelineObjectList.mapNotNull<TimelineObject, TimelineObjectDetail> {
                 val timelineUserDetail = userDetails[it.userDetailId] ?: return@mapNotNull null
@@ -268,6 +273,7 @@ abstract class AbstractTimelineStore(private val idGenerateService: IdGenerateSe
                 val repost = postMap[it.repostId]
                 val repostMedias = repost?.post?.mediaIds?.mapNotNull { mediaId -> mediaMap[mediaId] }
                 val repostActor = actors[it.repostActorId]
+                val reactionsList = reactions[it.postId].orEmpty()
                 TimelineObjectDetail.of(
                     timelineObject = it,
                     timelineUserDetail = timelineUserDetail,
@@ -288,7 +294,9 @@ abstract class AbstractTimelineStore(private val idGenerateService: IdGenerateSe
                             filterResult.filter.id,
                             filterResult.matchedKeyword
                         )
-                    }
+                    },
+                    reactionsList = reactionsList,
+                    favourited = it.favourited
                 )
             },
             timelineObjectList.lastOrNull()?.postId,
@@ -300,5 +308,7 @@ abstract class AbstractTimelineStore(private val idGenerateService: IdGenerateSe
 
     protected abstract suspend fun getMedias(mediaIds: List<MediaId>): Map<MediaId, Media>
 
+    protected abstract suspend fun getReactions(postIds: List<PostId>): Map<PostId, List<Reactions>>
+
     protected abstract suspend fun getUserDetails(userDetailIdList: List<UserDetailId>): Map<UserDetailId, UserDetail>
 }
diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/timeline/DefaultTimelineStore.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/timeline/DefaultTimelineStore.kt
index 36faa561..7426d1b6 100644
--- a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/timeline/DefaultTimelineStore.kt
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/timeline/DefaultTimelineStore.kt
@@ -1,5 +1,6 @@
 package dev.usbharu.hideout.core.infrastructure.timeline
 
+import dev.usbharu.hideout.core.application.model.Reactions
 import dev.usbharu.hideout.core.config.DefaultTimelineStoreConfig
 import dev.usbharu.hideout.core.domain.model.actor.Actor
 import dev.usbharu.hideout.core.domain.model.actor.ActorId
@@ -32,6 +33,7 @@ import dev.usbharu.hideout.core.domain.service.filter.FilterDomainService
 import dev.usbharu.hideout.core.domain.service.post.IPostReadAccessControl
 import dev.usbharu.hideout.core.domain.shared.id.IdGenerateService
 import dev.usbharu.hideout.core.external.timeline.ReadTimelineOption
+import dev.usbharu.hideout.core.query.reactions.ReactionsQueryService
 import org.springframework.stereotype.Component
 import java.time.Instant
 
@@ -49,7 +51,8 @@ open class DefaultTimelineStore(
     private val userDetailRepository: UserDetailRepository,
     private val actorRepository: ActorRepository,
     private val mediaRepository: MediaRepository,
-    private val postIPostReadAccessControl: IPostReadAccessControl
+    private val postIPostReadAccessControl: IPostReadAccessControl,
+    private val reactionsQueryService: ReactionsQueryService,
 ) : AbstractTimelineStore(idGenerateService) {
     override suspend fun getTimelines(actorId: ActorId): List<Timeline> {
         return timelineRepository.findByIds(
@@ -157,6 +160,10 @@ open class DefaultTimelineStore(
     override suspend fun getMedias(mediaIds: List<MediaId>): Map<MediaId, Media> =
         mediaRepository.findByIds(mediaIds).associateBy { it.id }
 
+    override suspend fun getReactions(postIds: List<PostId>): Map<PostId, List<Reactions>> {
+        return reactionsQueryService.findAllByPostIdIn(postIds).groupBy { PostId(it.postId) }
+    }
+
     override suspend fun getUserDetails(userDetailIdList: List<UserDetailId>): Map<UserDetailId, UserDetail> =
         userDetailRepository.findAllById(userDetailIdList).associateBy { it.id }
 }
diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/interfaces/web/posts/PostsController.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/interfaces/web/posts/PostsController.kt
index 4dda4759..f1005327 100644
--- a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/interfaces/web/posts/PostsController.kt
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/interfaces/web/posts/PostsController.kt
@@ -4,18 +4,25 @@ import dev.usbharu.hideout.core.application.exception.PermissionDeniedException
 import dev.usbharu.hideout.core.application.instance.GetLocalInstanceApplicationService
 import dev.usbharu.hideout.core.application.post.GetPostDetail
 import dev.usbharu.hideout.core.application.post.GetPostDetailApplicationService
+import dev.usbharu.hideout.core.application.reaction.CreateReaction
+import dev.usbharu.hideout.core.application.reaction.RemoveReaction
+import dev.usbharu.hideout.core.application.reaction.UserCreateReactionApplicationService
+import dev.usbharu.hideout.core.application.reaction.UserRemoveReactionApplicationService
 import dev.usbharu.hideout.core.infrastructure.springframework.SpringSecurityFormLoginPrincipalContextHolder
 import org.springframework.security.access.AccessDeniedException
 import org.springframework.stereotype.Controller
 import org.springframework.ui.Model
 import org.springframework.web.bind.annotation.GetMapping
 import org.springframework.web.bind.annotation.PathVariable
+import org.springframework.web.bind.annotation.PostMapping
 
 @Controller
 class PostsController(
     private val getPostDetailApplicationService: GetPostDetailApplicationService,
     private val springSecurityFormLoginPrincipalContextHolder: SpringSecurityFormLoginPrincipalContextHolder,
-    private val getLocalInstanceApplicationService: GetLocalInstanceApplicationService
+    private val getLocalInstanceApplicationService: GetLocalInstanceApplicationService,
+    private val userCreateReactionApplicationService: UserCreateReactionApplicationService,
+    private val userRemoveReactionApplicationService: UserRemoveReactionApplicationService
 ) {
     @GetMapping("/users/{name}/posts/{id}")
     suspend fun postById(@PathVariable id: Long, model: Model): String {
@@ -31,4 +38,32 @@ class PostsController(
 
         return "postById"
     }
+
+    @PostMapping("/users/{name}/posts/{id}/favourite")
+    suspend fun favourite(@PathVariable id: Long, @PathVariable name: String): String {
+        val principal = springSecurityFormLoginPrincipalContextHolder.getPrincipal()
+        userCreateReactionApplicationService.execute(
+            CreateReaction(
+                id,
+                null,
+                "❤"
+            ),
+            principal
+        )
+        return "redirect:/users/$name/posts/$id"
+    }
+
+    @PostMapping("/users/{name}/posts/{id}/unfavourite")
+    suspend fun unfavourite(@PathVariable id: Long, @PathVariable name: String): String {
+        val principal = springSecurityFormLoginPrincipalContextHolder.getPrincipal()
+        userRemoveReactionApplicationService.execute(
+            RemoveReaction(
+                id,
+                null,
+                "❤"
+            ),
+            principal
+        )
+        return "redirect:/users/$name/posts/$id"
+    }
 }
diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/query/reactions/ReactionsQueryService.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/query/reactions/ReactionsQueryService.kt
new file mode 100644
index 00000000..e410c4ae
--- /dev/null
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/query/reactions/ReactionsQueryService.kt
@@ -0,0 +1,9 @@
+package dev.usbharu.hideout.core.query.reactions
+
+import dev.usbharu.hideout.core.application.model.Reactions
+import dev.usbharu.hideout.core.domain.model.post.PostId
+
+interface ReactionsQueryService {
+    suspend fun findAllByPostId(postId: PostId): List<Reactions>
+    suspend fun findAllByPostIdIn(postIds: List<PostId>): List<Reactions>
+}
diff --git a/hideout-core/src/main/resources/db/migration/V1__Init_DB.sql b/hideout-core/src/main/resources/db/migration/V1__Init_DB.sql
index 6ce43568..f4c62702 100644
--- a/hideout-core/src/main/resources/db/migration/V1__Init_DB.sql
+++ b/hideout-core/src/main/resources/db/migration/V1__Init_DB.sql
@@ -318,4 +318,17 @@ create table if not exists filter_keywords
     keyword   varchar(1000) not null,
     mode      varchar(100)  not null,
     constraint fk_filter_keywords_filter_id__id foreign key (filter_id) references filters (id) on delete cascade on update cascade
-)
\ No newline at end of file
+);
+
+create table if not exists reactions
+(
+    id              bigint primary key,
+    post_id         bigint       not null,
+    actor_id        bigint       not null,
+    custom_emoji_id bigint       null,
+    unicode_emoji   varchar(100) not null,
+    created_at      timestamp    not null,
+    constraint fk_reactions_post_id__id foreign key (post_id) references posts (id) on delete cascade on update cascade,
+    constraint fk_reactions_actor_id__id foreign key (actor_id) references actors (id) on delete cascade on update cascade,
+    unique (post_id, actor_id, created_at, unicode_emoji)
+);
\ No newline at end of file
diff --git a/hideout-core/src/main/resources/templates/fragments-post.html b/hideout-core/src/main/resources/templates/fragments-post.html
index e55f55be..d16f4861 100644
--- a/hideout-core/src/main/resources/templates/fragments-post.html
+++ b/hideout-core/src/main/resources/templates/fragments-post.html
@@ -44,10 +44,27 @@
 
 <div class="post-controller" th:fragment="single-post-controller(post)">
     <!--/*@thymesVar id="post" type="dev.usbharu.hideout.core.application.post.PostDetail"*/-->
-    <a th:href="${'/publish?reply_to=' + post.id}">Reply</a>
-    <a th:href="${post.apId}">
-        <time th:datetime="${post.createdAt}" th:text="${#temporals.format(post.createdAt, 'yyyy-MM-dd HH:mm')}"></time>
-    </a>
+    <th:block th:if="${post.favourited}">
+        <form method="post" th:action="@{/users/a/posts/{id}/unfavourite(id=${post.id})}">
+            <a th:href="${'/publish?reply_to=' + post.id}">Reply</a>
+            <input type="submit" value="[❤]">
+            <a th:href="${post.apId}">
+                <time th:datetime="${post.createdAt}"
+                      th:text="${#temporals.format(post.createdAt, 'yyyy-MM-dd HH:mm')}"></time>
+            </a>
+        </form>
+    </th:block>
+    <th:block th:unless="${post.favourited}">
+        <form method="post" th:action="@{/users/a/posts/{id}/favourite(id=${post.id})}">
+            <a th:href="${'/publish?reply_to=' + post.id}">Reply</a>
+            <input type="submit" value="❤">
+            <a th:href="${post.apId}">
+                <time th:datetime="${post.createdAt}"
+                      th:text="${#temporals.format(post.createdAt, 'yyyy-MM-dd HH:mm')}"></time>
+            </a>
+        </form>
+    </th:block>
+
 </div>
 
 
diff --git a/hideout-core/src/test/kotlin/dev/usbharu/hideout/core/domain/model/actor/TestActorFactory.kt b/hideout-core/src/test/kotlin/dev/usbharu/hideout/core/domain/model/actor/TestActorFactory.kt
index 3286ed74..4f81a194 100644
--- a/hideout-core/src/test/kotlin/dev/usbharu/hideout/core/domain/model/actor/TestActorFactory.kt
+++ b/hideout-core/src/test/kotlin/dev/usbharu/hideout/core/domain/model/actor/TestActorFactory.kt
@@ -1,6 +1,6 @@
 package dev.usbharu.hideout.core.domain.model.actor
 
-import dev.usbharu.hideout.core.domain.model.emoji.EmojiId
+import dev.usbharu.hideout.core.domain.model.emoji.CustomEmojiId
 import dev.usbharu.hideout.core.domain.model.instance.InstanceId
 import dev.usbharu.hideout.core.domain.model.support.domain.Domain
 import dev.usbharu.hideout.core.infrastructure.other.TwitterSnowflakeIdGenerateService
@@ -35,7 +35,7 @@ object TestActorFactory {
         suspend: Boolean = false,
         alsoKnownAs: Set<ActorId> = emptySet(),
         moveTo: Long? = null,
-        emojiIds: Set<EmojiId> = emptySet(),
+        emojiIds: Set<CustomEmojiId> = emptySet(),
         deleted: Boolean = false,
         roles: Set<Role> = emptySet(),
     ): Actor {
diff --git a/hideout-core/src/test/kotlin/dev/usbharu/hideout/core/domain/model/emoji/EmojiIdTest.kt b/hideout-core/src/test/kotlin/dev/usbharu/hideout/core/domain/model/emoji/CustomEmojiIdTest.kt
similarity index 82%
rename from hideout-core/src/test/kotlin/dev/usbharu/hideout/core/domain/model/emoji/EmojiIdTest.kt
rename to hideout-core/src/test/kotlin/dev/usbharu/hideout/core/domain/model/emoji/CustomEmojiIdTest.kt
index c304294b..e9383cdb 100644
--- a/hideout-core/src/test/kotlin/dev/usbharu/hideout/core/domain/model/emoji/EmojiIdTest.kt
+++ b/hideout-core/src/test/kotlin/dev/usbharu/hideout/core/domain/model/emoji/CustomEmojiIdTest.kt
@@ -3,18 +3,18 @@ package dev.usbharu.hideout.core.domain.model.emoji
 import org.junit.jupiter.api.Assertions.assertDoesNotThrow
 import org.junit.jupiter.api.Test
 
-class EmojiIdTest {
+class CustomEmojiIdTest {
     @Test
     fun emojiIdは0以上である必要がある() {
         org.junit.jupiter.api.assertThrows<IllegalArgumentException> {
-            EmojiId(-1)
+            CustomEmojiId(-1)
         }
     }
 
     @Test
     fun emojiIdは0以上なら設定できる() {
         assertDoesNotThrow {
-            EmojiId(1)
+            CustomEmojiId(1)
         }
     }
 }
\ No newline at end of file
diff --git a/hideout-core/src/test/kotlin/dev/usbharu/hideout/core/domain/model/post/PostTest.kt b/hideout-core/src/test/kotlin/dev/usbharu/hideout/core/domain/model/post/PostTest.kt
index ae8cc674..a07a0b0d 100644
--- a/hideout-core/src/test/kotlin/dev/usbharu/hideout/core/domain/model/post/PostTest.kt
+++ b/hideout-core/src/test/kotlin/dev/usbharu/hideout/core/domain/model/post/PostTest.kt
@@ -4,7 +4,7 @@ import dev.usbharu.hideout.core.domain.event.post.PostEvent
 import dev.usbharu.hideout.core.domain.model.actor.ActorId
 import dev.usbharu.hideout.core.domain.model.actor.ActorPublicKey
 import dev.usbharu.hideout.core.domain.model.actor.TestActorFactory
-import dev.usbharu.hideout.core.domain.model.emoji.EmojiId
+import dev.usbharu.hideout.core.domain.model.emoji.CustomEmojiId
 import dev.usbharu.hideout.core.domain.model.media.MediaId
 import org.junit.jupiter.api.Assertions.assertTrue
 import org.junit.jupiter.api.Test
@@ -447,7 +447,7 @@ class PostTest {
     @Test
     fun `emojiIds hideがtrueの時empty`() {
         val actor = TestActorFactory.create()
-        val emojiIds = listOf(EmojiId(1), EmojiId(2))
+        val emojiIds = listOf(CustomEmojiId(1), CustomEmojiId(2))
         val post = Post.create(
             id = PostId(1),
             actorId = actor.id,
@@ -473,7 +473,7 @@ class PostTest {
     @Test
     fun `emojiIds hideがfalseの時中身が返される`() {
         val actor = TestActorFactory.create()
-        val emojiIds = listOf(EmojiId(1), EmojiId(2))
+        val emojiIds = listOf(CustomEmojiId(1), CustomEmojiId(2))
         val post = Post.create(
             id = PostId(1),
             actorId = actor.id,
@@ -500,7 +500,7 @@ class PostTest {
         val post = TestPostFactory.create()
         val mediaIds = listOf<MediaId>(MediaId(1))
         val visibleActors = setOf<ActorId>((ActorId(2)))
-        val emojis = listOf<EmojiId>(EmojiId(3))
+        val emojis = listOf<CustomEmojiId>(CustomEmojiId(3))
         val reconstructWith = post.reconstructWith(mediaIds, emojis, visibleActors)
 
         assertEquals(mediaIds, reconstructWith.mediaIds)
@@ -511,7 +511,7 @@ class PostTest {
     @Test
     fun `mediaIds hideがtrueの時emptyが返される`() {
         val actor = TestActorFactory.create()
-        val emojiIds = listOf(EmojiId(1), EmojiId(2))
+        val emojiIds = listOf(CustomEmojiId(1), CustomEmojiId(2))
         val mediaIds = listOf(MediaId(1))
         val post = Post.create(
             id = PostId(1),
@@ -538,7 +538,7 @@ class PostTest {
     @Test
     fun `mediaIds hideがfalseの時中身が返される`() {
         val actor = TestActorFactory.create()
-        val emojiIds = listOf(EmojiId(1), EmojiId(2))
+        val emojiIds = listOf(CustomEmojiId(1), CustomEmojiId(2))
         val mediaIds = listOf(MediaId(2))
         val post = Post.create(
             id = PostId(1),
@@ -603,7 +603,7 @@ class PostTest {
     fun `restore 指定された引数で再構成されCHECKUPDATEイベントが発生する`() {
         val post = TestPostFactory.create(deleted = true)
 
-        val postContent = PostContent("aiueo", "aiueo", listOf(EmojiId(1)))
+        val postContent = PostContent("aiueo", "aiueo", listOf(CustomEmojiId(1)))
         val overview = PostOverview("overview")
         val mediaIds = listOf(MediaId(1))
         post.restore(
@@ -622,7 +622,7 @@ class PostTest {
     fun deletedがfalseの時失敗する() {
         val post = TestPostFactory.create(deleted = false)
 
-        val postContent = PostContent("aiueo", "aiueo", listOf(EmojiId(1)))
+        val postContent = PostContent("aiueo", "aiueo", listOf(CustomEmojiId(1)))
         val overview = PostOverview("overview")
         val mediaIds = listOf(MediaId(1))
         assertThrows<IllegalArgumentException> {
diff --git a/hideout-core/src/test/kotlin/dev/usbharu/hideout/core/infrastructure/emojikt/EmojiKtUnicodeEmojiServiceTest.kt b/hideout-core/src/test/kotlin/dev/usbharu/hideout/core/infrastructure/emojikt/EmojiKtUnicodeEmojiServiceTest.kt
new file mode 100644
index 00000000..f589be2c
--- /dev/null
+++ b/hideout-core/src/test/kotlin/dev/usbharu/hideout/core/infrastructure/emojikt/EmojiKtUnicodeEmojiServiceTest.kt
@@ -0,0 +1,16 @@
+package dev.usbharu.hideout.core.infrastructure.emojikt
+
+import org.junit.jupiter.api.Assertions.assertTrue
+import org.junit.jupiter.params.ParameterizedTest
+import org.junit.jupiter.params.provider.ValueSource
+
+class EmojiKtUnicodeEmojiServiceTest {
+
+    @ParameterizedTest
+    @ValueSource(strings = ["❤", "👱", "☠️", "⁉️"])
+    fun 絵文字の判定ができる(s: String) {
+        assertTrue(EmojiKtUnicodeEmojiService().isUnicodeEmoji(s))
+    }
+
+
+}
\ No newline at end of file
diff --git a/hideout-mastodon/src/main/kotlin/dev/usbharu/hideout/mastodon/interfaces/api/SpringStatusApi.kt b/hideout-mastodon/src/main/kotlin/dev/usbharu/hideout/mastodon/interfaces/api/SpringStatusApi.kt
index 5e045a59..10e54af0 100644
--- a/hideout-mastodon/src/main/kotlin/dev/usbharu/hideout/mastodon/interfaces/api/SpringStatusApi.kt
+++ b/hideout-mastodon/src/main/kotlin/dev/usbharu/hideout/mastodon/interfaces/api/SpringStatusApi.kt
@@ -18,6 +18,10 @@ package dev.usbharu.hideout.mastodon.interfaces.api
 
 import dev.usbharu.hideout.core.application.post.RegisterLocalPost
 import dev.usbharu.hideout.core.application.post.RegisterLocalPostApplicationService
+import dev.usbharu.hideout.core.application.reaction.CreateReaction
+import dev.usbharu.hideout.core.application.reaction.RemoveReaction
+import dev.usbharu.hideout.core.application.reaction.UserCreateReactionApplicationService
+import dev.usbharu.hideout.core.application.reaction.UserRemoveReactionApplicationService
 import dev.usbharu.hideout.core.domain.model.post.Visibility
 import dev.usbharu.hideout.core.infrastructure.springframework.oauth2.SpringSecurityOauth2PrincipalContextHolder
 import dev.usbharu.hideout.mastodon.application.status.GetStatus
@@ -32,7 +36,9 @@ import org.springframework.stereotype.Controller
 class SpringStatusApi(
     private val registerLocalPostApplicationService: RegisterLocalPostApplicationService,
     private val getStatusApplicationService: GetStatusApplicationService,
-    private val principalContextHolder: SpringSecurityOauth2PrincipalContextHolder
+    private val principalContextHolder: SpringSecurityOauth2PrincipalContextHolder,
+    private val userCreateReactionApplicationService: UserCreateReactionApplicationService,
+    private val userRemoveReactionApplicationService: UserRemoveReactionApplicationService
 ) : StatusApi {
     override suspend fun apiV1StatusesIdEmojiReactionsEmojiDelete(id: String, emoji: String): ResponseEntity<Status> =
         super.apiV1StatusesIdEmojiReactionsEmojiDelete(id, emoji)
@@ -49,6 +55,20 @@ class SpringStatusApi(
         )
     }
 
+    override suspend fun apiV1StatusesIdFavouritePost(id: String): ResponseEntity<Status> {
+        val principal = principalContextHolder.getPrincipal()
+
+        userCreateReactionApplicationService.execute(CreateReaction(postId = id.toLong(), null, "❤"), principal)
+        return ResponseEntity.ok(getStatusApplicationService.execute(GetStatus(id), principal))
+    }
+
+    override suspend fun apiV1StatusesIdUnfavouritePost(id: String): ResponseEntity<Status> {
+        val principal = principalContextHolder.getPrincipal()
+
+        userRemoveReactionApplicationService.execute(RemoveReaction(postId = id.toLong(), null, "❤"), principal)
+        return ResponseEntity.ok(getStatusApplicationService.execute(GetStatus(id), principal))
+    }
+
     override suspend fun apiV1StatusesPost(statusesRequest: StatusesRequest): ResponseEntity<Status> {
         val principal = principalContextHolder.getPrincipal()
         val execute = registerLocalPostApplicationService.execute(
diff --git a/hideout-mastodon/src/main/resources/openapi/mastodon.yaml b/hideout-mastodon/src/main/resources/openapi/mastodon.yaml
index bc5195d5..76d8f5aa 100644
--- a/hideout-mastodon/src/main/resources/openapi/mastodon.yaml
+++ b/hideout-mastodon/src/main/resources/openapi/mastodon.yaml
@@ -177,6 +177,48 @@ paths:
               schema:
                 $ref: "#/components/schemas/Status"
 
+  /api/v1/statuses/{id}/favourite:
+    post:
+      tags:
+        - status
+      security:
+        - OAuth2:
+            - "write:favourites"
+      parameters:
+        - in: path
+          name: id
+          required: true
+          schema:
+            type: string
+      responses:
+        200:
+          description: 成功
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/Status"
+
+  /api/v1/statuses/{id}/unfavourite:
+    post:
+      tags:
+        - status
+      security:
+        - OAuth2:
+            - "write:favourites"
+      parameters:
+        - in: path
+          name: id
+          required: true
+          schema:
+            type: string
+      responses:
+        200:
+          description: 成功
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/Status"
+
   /api/v1/statuses/{id}/emoji_reactions/{emoji}:
     put:
       tags: