diff --git a/src/main/kotlin/dev/usbharu/hideout/query/ReactionQueryService.kt b/src/main/kotlin/dev/usbharu/hideout/query/ReactionQueryService.kt
new file mode 100644
index 00000000..db5a844f
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/query/ReactionQueryService.kt
@@ -0,0 +1,14 @@
+package dev.usbharu.hideout.query
+
+import dev.usbharu.hideout.domain.model.hideout.entity.Reaction
+
+interface ReactionQueryService {
+    suspend fun findByPostId(postId: Long): List<Reaction>
+
+    @Suppress("FunctionMaxLength")
+    suspend fun findByPostIdAndUserIdAndEmojiId(postId: Long, userId: Long, emojiId: Long): Reaction
+
+    suspend fun reactionAlreadyExist(postId: Long, userId: Long, emojiId: Long): Boolean
+
+    suspend fun deleteByPostIdAndUserId(postId: Long, userId: Long)
+}
diff --git a/src/main/kotlin/dev/usbharu/hideout/query/ReactionQueryServiceImpl.kt b/src/main/kotlin/dev/usbharu/hideout/query/ReactionQueryServiceImpl.kt
new file mode 100644
index 00000000..8b6bf9ec
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/query/ReactionQueryServiceImpl.kt
@@ -0,0 +1,42 @@
+package dev.usbharu.hideout.query
+
+import dev.usbharu.hideout.domain.model.hideout.entity.Reaction
+import dev.usbharu.hideout.repository.Reactions
+import dev.usbharu.hideout.repository.toReaction
+import org.jetbrains.exposed.sql.SqlExpressionBuilder.eq
+import org.jetbrains.exposed.sql.and
+import org.jetbrains.exposed.sql.deleteWhere
+import org.jetbrains.exposed.sql.select
+import org.koin.core.annotation.Single
+
+@Single
+class ReactionQueryServiceImpl : ReactionQueryService {
+    override suspend fun findByPostId(postId: Long): List<Reaction> {
+        return Reactions.select {
+            Reactions.postId.eq(postId)
+        }.map { it.toReaction() }
+    }
+
+    override suspend fun findByPostIdAndUserIdAndEmojiId(postId: Long, userId: Long, emojiId: Long): Reaction {
+        return Reactions
+            .select {
+                Reactions.postId.eq(postId).and(Reactions.userId.eq(userId)).and(
+                    Reactions.emojiId.eq(emojiId)
+                )
+            }
+            .single()
+            .toReaction()
+    }
+
+    override suspend fun reactionAlreadyExist(postId: Long, userId: Long, emojiId: Long): Boolean {
+        return Reactions.select {
+            Reactions.postId.eq(postId).and(Reactions.userId.eq(userId)).and(
+                Reactions.emojiId.eq(emojiId)
+            )
+        }.empty().not()
+    }
+
+    override suspend fun deleteByPostIdAndUserId(postId: Long, userId: Long) {
+        Reactions.deleteWhere { Reactions.postId.eq(postId).and(Reactions.userId.eq(userId)) }
+    }
+}
diff --git a/src/main/kotlin/dev/usbharu/hideout/repository/ReactionRepository.kt b/src/main/kotlin/dev/usbharu/hideout/repository/ReactionRepository.kt
index d51d00c2..f2aad560 100644
--- a/src/main/kotlin/dev/usbharu/hideout/repository/ReactionRepository.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/repository/ReactionRepository.kt
@@ -5,11 +5,5 @@ import dev.usbharu.hideout.domain.model.hideout.entity.Reaction
 interface ReactionRepository {
     suspend fun generateId(): Long
     suspend fun save(reaction: Reaction): Reaction
-    suspend fun reactionAlreadyExist(postId: Long, userId: Long, emojiId: Long): Boolean
-    suspend fun findByPostId(postId: Long): List<Reaction>
     suspend fun delete(reaction: Reaction): Reaction
-    suspend fun deleteById(id: Long)
-    suspend fun deleteByPostId(postId: Long)
-    suspend fun deleteByUserId(userId: Long)
-    suspend fun deleteByPostIdAndUserId(postId: Long, userId: Long)
 }
diff --git a/src/main/kotlin/dev/usbharu/hideout/repository/ReactionRepositoryImpl.kt b/src/main/kotlin/dev/usbharu/hideout/repository/ReactionRepositoryImpl.kt
index 3717fbab..08707c35 100644
--- a/src/main/kotlin/dev/usbharu/hideout/repository/ReactionRepositoryImpl.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/repository/ReactionRepositoryImpl.kt
@@ -79,24 +79,6 @@ class ReactionRepositoryImpl(
         return reaction
     }
 
-    override suspend fun deleteById(id: Long) {
-        query {
-            Reactions.deleteWhere { Reactions.id.eq(id) }
-        }
-    }
-
-    override suspend fun deleteByPostId(postId: Long) {
-        query {
-            Reactions.deleteWhere { Reactions.postId.eq(postId) }
-        }
-    }
-
-    override suspend fun deleteByUserId(userId: Long) {
-        query {
-            Reactions.deleteWhere { Reactions.userId.eq(userId) }
-        }
-    }
-
     override suspend fun deleteByPostIdAndUserId(postId: Long, userId: Long) {
         query {
             Reactions.deleteWhere { Reactions.postId.eq(postId).and(Reactions.userId.eq(userId)) }
diff --git a/src/main/kotlin/dev/usbharu/hideout/service/reaction/ReactionServiceImpl.kt b/src/main/kotlin/dev/usbharu/hideout/service/reaction/ReactionServiceImpl.kt
index 489a85ea..6b604527 100644
--- a/src/main/kotlin/dev/usbharu/hideout/service/reaction/ReactionServiceImpl.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/service/reaction/ReactionServiceImpl.kt
@@ -3,6 +3,7 @@ package dev.usbharu.hideout.service.reaction
 import dev.usbharu.hideout.domain.model.hideout.dto.Account
 import dev.usbharu.hideout.domain.model.hideout.dto.ReactionResponse
 import dev.usbharu.hideout.domain.model.hideout.entity.Reaction
+import dev.usbharu.hideout.query.ReactionQueryService
 import dev.usbharu.hideout.repository.ReactionRepository
 import dev.usbharu.hideout.repository.Reactions
 import dev.usbharu.hideout.repository.Users
@@ -16,10 +17,11 @@ import org.koin.core.annotation.Single
 @Single
 class ReactionServiceImpl(
     private val reactionRepository: ReactionRepository,
-    private val activityPubReactionService: ActivityPubReactionService
+    private val activityPubReactionService: ActivityPubReactionService,
+    private val reactionQueryService: ReactionQueryService
 ) : IReactionService {
     override suspend fun receiveReaction(name: String, domain: String, userId: Long, postId: Long) {
-        if (reactionRepository.reactionAlreadyExist(postId, userId, 0).not()) {
+        if (reactionQueryService.reactionAlreadyExist(postId, userId, 0).not()) {
             reactionRepository.save(
                 Reaction(reactionRepository.generateId(), 0, postId, userId)
             )
@@ -27,9 +29,9 @@ class ReactionServiceImpl(
     }
 
     override suspend fun sendReaction(name: String, userId: Long, postId: Long) {
-        if (reactionRepository.reactionAlreadyExist(postId, userId, 0)) {
+        if (reactionQueryService.reactionAlreadyExist(postId, userId, 0)) {
             // delete
-            reactionRepository.deleteByPostIdAndUserId(postId, userId)
+            reactionQueryService.deleteByPostIdAndUserId(postId, userId)
         } else {
             val reaction = Reaction(reactionRepository.generateId(), 0, postId, userId)
             reactionRepository.save(reaction)
@@ -38,7 +40,7 @@ class ReactionServiceImpl(
     }
 
     override suspend fun removeReaction(userId: Long, postId: Long) {
-        reactionRepository.deleteByPostIdAndUserId(postId, userId)
+        reactionQueryService.deleteByPostIdAndUserId(postId, userId)
     }
 
     override suspend fun findByPostIdForUser(postId: Long, userId: Long): List<ReactionResponse> {