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 5c6c56f4..42586a73 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
@@ -22,16 +22,53 @@ class TimelineObject(
     val postCreatedAt: Instant,
     val replyId: PostId?,
     val repostId: PostId?,
-    val visibility: Visibility,
-    val isPureRepost: Boolean,
-    val mediaIds: List<MediaId>,
-    val emojiIds: List<EmojiId>,
-    val visibleActors: List<ActorId>,
-    val hasMedia: Boolean,
-    val hasMediaInRepost: Boolean,
-    val lastUpdatedAt: Instant,
-    val warnFilters: List<TimelineObjectWarnFilter>,
-) {
+    visibility: Visibility,
+    isPureRepost: Boolean,
+    mediaIds: List<MediaId>,
+    emojiIds: List<EmojiId>,
+    visibleActors: List<ActorId>,
+    hasMediaInRepost: Boolean,
+    lastUpdatedAt: Instant,
+    var warnFilters: List<TimelineObjectWarnFilter>,
+
+    ) {
+    var isPureRepost = isPureRepost
+        private set
+    var visibleActors = visibleActors
+        private set
+    var hasMediaInRepost = hasMediaInRepost
+        private set
+    val hasMedia
+        get() = mediaIds.isNotEmpty()
+
+    var lastUpdatedAt = lastUpdatedAt
+        private set
+    var visibility = visibility
+        private set
+    var mediaIds = mediaIds
+        private set
+    var emojiIds = emojiIds
+        private set
+
+    fun updateWith(post: Post, filterResults: List<FilterResult>) {
+        visibleActors = post.visibleActors.toList()
+        visibility = post.visibility
+        mediaIds = post.mediaIds.toList()
+        emojiIds = post.emojiIds.toList()
+        lastUpdatedAt = Instant.now()
+        isPureRepost =
+            post.repostId != null && post.replyId == null && post.text.isEmpty() && post.overview?.overview.isNullOrEmpty()
+        warnFilters = filterResults.map { TimelineObjectWarnFilter(it.filter.id, it.matchedKeyword) }
+    }
+
+    fun updateWith(post: Post, repost: Post, filterResults: List<FilterResult>) {
+        require(repost.id == post.repostId)
+        require(repostId == post.repostId)
+
+        updateWith(post, filterResults)
+        hasMediaInRepost = repost.mediaIds.isNotEmpty()
+    }
+
     companion object {
 
         fun create(
@@ -54,7 +91,6 @@ class TimelineObject(
                 mediaIds = post.mediaIds,
                 emojiIds = post.emojiIds,
                 visibleActors = post.visibleActors.toList(),
-                hasMedia = post.mediaIds.isNotEmpty(),
                 hasMediaInRepost = false,
                 lastUpdatedAt = Instant.now(),
                 warnFilters = filterResults.map { TimelineObjectWarnFilter(it.filter.id, it.matchedKeyword) }
@@ -88,7 +124,6 @@ class TimelineObject(
                 mediaIds = post.mediaIds,
                 emojiIds = post.emojiIds,
                 visibleActors = post.visibleActors.toList(),
-                hasMedia = post.mediaIds.isNotEmpty(),
                 hasMediaInRepost = repost.mediaIds.isNotEmpty(),
                 lastUpdatedAt = Instant.now(),
                 warnFilters = filterResults.map { TimelineObjectWarnFilter(it.filter.id, it.matchedKeyword) }
diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/external/timeline/TimelineStore.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/external/timeline/TimelineStore.kt
index 4656d30a..6c3331fe 100644
--- a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/external/timeline/TimelineStore.kt
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/external/timeline/TimelineStore.kt
@@ -1,7 +1,15 @@
 package dev.usbharu.hideout.core.external.timeline
 
 import dev.usbharu.hideout.core.domain.model.post.Post
+import dev.usbharu.hideout.core.domain.model.timeline.Timeline
+import dev.usbharu.hideout.core.domain.model.timelinerelationship.TimelineRelationship
 
 interface TimelineStore {
-    suspend fun newPost(post: Post)
+    suspend fun addPost(post: Post)
+    suspend fun updatePost(post: Post)
+    suspend fun removePost(post: Post)
+    suspend fun addTimelineRelationship(timelineRelationship: TimelineRelationship)
+    suspend fun removeTimelineRelationship(timelineRelationship: TimelineRelationship)
+    suspend fun addTimeline(timeline: Timeline, timelineRelationshipList: List<TimelineRelationship>)
+    suspend fun removeTimeline(timeline: Timeline)
 }
\ No newline at end of file
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 a06a217b..00ac8985 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
@@ -8,12 +8,13 @@ import dev.usbharu.hideout.core.domain.model.post.PostId
 import dev.usbharu.hideout.core.domain.model.timeline.Timeline
 import dev.usbharu.hideout.core.domain.model.timelineobject.TimelineObject
 import dev.usbharu.hideout.core.domain.model.timelineobject.TimelineObjectId
+import dev.usbharu.hideout.core.domain.model.timelinerelationship.TimelineRelationship
 import dev.usbharu.hideout.core.domain.model.userdetails.UserDetailId
 import dev.usbharu.hideout.core.domain.shared.id.IdGenerateService
 import dev.usbharu.hideout.core.external.timeline.TimelineStore
 
 abstract class AbstractTimelineStore(private val idGenerateService: IdGenerateService) : TimelineStore {
-    override suspend fun newPost(post: Post) {
+    override suspend fun addPost(post: Post) {
         val timelineList = getTimeline(post.actorId)
 
         val repost = post.repostId?.let { getPost(it) }
@@ -57,4 +58,44 @@ abstract class AbstractTimelineStore(private val idGenerateService: IdGenerateSe
     protected abstract suspend fun getPost(postId: PostId): Post?
 
     protected abstract suspend fun insertTimelineObject(timelineObjectList: List<TimelineObject>)
+
+    protected abstract suspend fun getTimelineObjectByPostId(postId: PostId): List<TimelineObject>
+
+    protected abstract suspend fun removeTimelineObject(postId: PostId)
+
+    override suspend fun updatePost(post: Post) {
+
+
+        val timelineObjectByPostId = getTimelineObjectByPostId(post.id)
+
+        val repost = post.repostId?.let { getPost(it) }
+
+        if (repost != null) {
+            timelineObjectByPostId.map {
+                val filters = getFilters(it.userDetailId)
+                val applyFilters = applyFilters(post, filters)
+                it.updateWith(post, repost, applyFilters.filterResults)
+            }
+        }
+    }
+
+    override suspend fun removePost(post: Post) {
+        TODO("Not yet implemented")
+    }
+
+    override suspend fun addTimelineRelationship(timelineRelationship: TimelineRelationship) {
+        TODO("Not yet implemented")
+    }
+
+    override suspend fun removeTimelineRelationship(timelineRelationship: TimelineRelationship) {
+        TODO("Not yet implemented")
+    }
+
+    override suspend fun addTimeline(timeline: Timeline, timelineRelationshipList: List<TimelineRelationship>) {
+        TODO("Not yet implemented")
+    }
+
+    override suspend fun removeTimeline(timeline: Timeline) {
+        TODO("Not yet implemented")
+    }
 }
\ No newline at end of file