diff --git a/packages/backend/src/core/GlobalEventService.ts b/packages/backend/src/core/GlobalEventService.ts
index d175f21f2..95a4eba74 100644
--- a/packages/backend/src/core/GlobalEventService.ts
+++ b/packages/backend/src/core/GlobalEventService.ts
@@ -130,6 +130,9 @@ export interface NoteEventTypes {
 		reaction: string;
 		userId: MiUser['id'];
 	};
+	replied: {
+		id: MiNote['id'];
+	};
 }
 type NoteStreamEventTypes = {
 	[key in keyof NoteEventTypes]: {
diff --git a/packages/backend/src/core/NoteCreateService.ts b/packages/backend/src/core/NoteCreateService.ts
index 0b0693121..6406bc4c5 100644
--- a/packages/backend/src/core/NoteCreateService.ts
+++ b/packages/backend/src/core/NoteCreateService.ts
@@ -780,6 +780,9 @@ export class NoteCreateService implements OnApplicationShutdown {
 
 			// If has in reply to note
 			if (data.reply) {
+				this.globalEventService.publishNoteStream(data.reply.id, 'replied', {
+					id: note.id,
+				});
 				// 通知
 				if (data.reply.userHost === null) {
 					const isThreadMuted = await this.noteThreadMutingsRepository.exist({
diff --git a/packages/frontend/src/components/MkNoteDetailed.vue b/packages/frontend/src/components/MkNoteDetailed.vue
index f29b9db6a..a793a85ff 100644
--- a/packages/frontend/src/components/MkNoteDetailed.vue
+++ b/packages/frontend/src/components/MkNoteDetailed.vue
@@ -170,7 +170,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 			<div v-if="!repliesLoaded" style="padding: 16px">
 				<MkButton style="margin: 0 auto;" primary rounded @click="loadReplies">{{ i18n.ts.loadReplies }}</MkButton>
 			</div>
-			<MkNoteSub v-for="note in replies" :key="note.id" :note="note" :class="$style.reply" :detail="true" :expandAllCws="props.expandAllCws"/>
+			<MkNoteSub v-for="note in replies" :key="note.id" :note="note" :class="$style.reply" :detail="true" :expandAllCws="props.expandAllCws" :onDeleteCallback="removeReply" />
 		</div>
 		<div v-else-if="tab === 'renotes'" :class="$style.tab_renotes">
 			<MkPagination :pagination="renotesPagination" :disableAutoLoad="true">
@@ -372,11 +372,25 @@ const reactionsPagination = computed(() => ({
 	},
 }));
 
+async function addReplyTo(replyNote: Misskey.entities.Note) {
+		replies.value.unshift(replyNote);
+		appearNote.value.repliesCount += 1;
+}
+
+async function removeReply(id: Misskey.entities.Note['id']) {
+		const replyIdx = replies.value.findIndex(note => note.id === id);
+		if (replyIdx >= 0) {
+			replies.value.splice(replyIdx, 1);
+			appearNote.value.repliesCount -= 1;
+		}
+}
+
 useNoteCapture({
 	rootEl: el,
 	note: appearNote,
 	pureNote: note,
 	isDeletedRef: isDeleted,
+	onReplyCallback: addReplyTo,
 });
 
 useTooltip(renoteButton, async (showing) => {
diff --git a/packages/frontend/src/components/MkNoteSub.vue b/packages/frontend/src/components/MkNoteSub.vue
index c61f0836b..9c25ce345 100644
--- a/packages/frontend/src/components/MkNoteSub.vue
+++ b/packages/frontend/src/components/MkNoteSub.vue
@@ -4,7 +4,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 -->
 
 <template>
-<div v-if="!muted" ref="el" :class="[$style.root, { [$style.children]: depth > 1 }]">
+<div v-show="!isDeleted" v-if="!muted" ref="el" :class="[$style.root, { [$style.children]: depth > 1 }]">
 	<div :class="$style.main">
 		<div v-if="note.channel" :class="$style.colorBar" :style="{ background: note.channel.color }"></div>
 		<MkAvatar :class="$style.avatar" :user="note.user" link preview/>
@@ -65,7 +65,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 		</div>
 	</div>
 	<template v-if="depth < numberOfReplies">
-		<MkNoteSub v-for="reply in replies" :key="reply.id" :note="reply" :class="$style.reply" :detail="true" :depth="depth + 1" :expandAllCws="props.expandAllCws"/>
+		<MkNoteSub v-for="reply in replies" :key="reply.id" :note="reply" :class="$style.reply" :detail="true" :depth="depth + 1" :expandAllCws="props.expandAllCws" :onDeleteCallback="removeReply"/>
 	</template>
 	<div v-else :class="$style.more">
 		<MkA class="_link" :to="notePage(note)">{{ i18n.ts.continueThread }} <i class="ph-caret-double-right ph-bold ph-lg"></i></MkA>
@@ -110,6 +110,7 @@ const props = withDefaults(defineProps<{
 	note: Misskey.entities.Note;
 	detail?: boolean;
 	expandAllCws?: boolean;
+	onDeleteCallback?: (id: Misskey.entities.Note['id']) => void;
 
 	// how many notes are in between this one and the note being viewed in detail
 	depth?: number;
@@ -132,6 +133,7 @@ const likeButton = shallowRef<HTMLElement>();
 
 let appearNote = computed(() => isRenote ? props.note.renote as Misskey.entities.Note : props.note);
 const defaultLike = computed(() => defaultStore.state.like ? defaultStore.state.like : null);
+const replies = ref<Misskey.entities.Note[]>([]);
 
 const isRenote = (
 	props.note.renote != null &&
@@ -140,10 +142,26 @@ const isRenote = (
 	props.note.poll == null
 );
 
+async function addReplyTo(replyNote: Misskey.entities.Note) {
+		replies.value.unshift(replyNote);
+		appearNote.value.repliesCount += 1;
+}
+
+async function removeReply(id: Misskey.entities.Note['id']) {
+		const replyIdx = replies.value.findIndex(note => note.id === id);
+		if (replyIdx >= 0) {
+			replies.value.splice(replyIdx, 1);
+			appearNote.value.repliesCount -= 1;
+		}
+}
+
 useNoteCapture({
 	rootEl: el,
 	note: appearNote,
 	isDeletedRef: isDeleted,
+	// only update replies if we are, in fact, showing replies
+	onReplyCallback: props.detail && props.depth < numberOfReplies.value ? addReplyTo : undefined,
+	onDeleteCallback: props.detail && props.depth < numberOfReplies.value ? props.onDeleteCallback : undefined,
 });
 
 if ($i) {
@@ -250,8 +268,6 @@ watch(() => props.expandAllCws, (expandAllCws) => {
 	if (expandAllCws !== showContent.value) showContent.value = expandAllCws;
 });
 
-let replies = ref<Misskey.entities.Note[]>([]);
-
 function boostVisibility() {
 	os.popupMenu([
 		{
diff --git a/packages/frontend/src/components/SkNoteDetailed.vue b/packages/frontend/src/components/SkNoteDetailed.vue
index 8bf9e244e..df0259a2c 100644
--- a/packages/frontend/src/components/SkNoteDetailed.vue
+++ b/packages/frontend/src/components/SkNoteDetailed.vue
@@ -178,7 +178,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 			<div v-if="!repliesLoaded" style="padding: 16px">
 				<MkButton style="margin: 0 auto;" primary rounded @click="loadReplies">{{ i18n.ts.loadReplies }}</MkButton>
 			</div>
-			<SkNoteSub v-for="note in replies" :key="note.id" :note="note" :class="$style.reply" :detail="true" :expandAllCws="props.expandAllCws"/>
+			<SkNoteSub v-for="note in replies" :key="note.id" :note="note" :class="$style.reply" :detail="true" :expandAllCws="props.expandAllCws" :onDeleteCallback="removeReply" />
 		</div>
 		<div v-else-if="tab === 'renotes'" :class="$style.tab_renotes">
 			<MkPagination :pagination="renotesPagination" :disableAutoLoad="true">
@@ -380,11 +380,25 @@ const reactionsPagination = computed(() => ({
 	},
 }));
 
+async function addReplyTo(replyNote: Misskey.entities.Note) {
+		replies.value.unshift(replyNote);
+		appearNote.value.repliesCount += 1;
+}
+
+async function removeReply(id: Misskey.entities.Note['id']) {
+		const replyIdx = replies.value.findIndex(note => note.id === id);
+		if (replyIdx >= 0) {
+			replies.value.splice(replyIdx, 1);
+			appearNote.value.repliesCount -= 1;
+		}
+}
+
 useNoteCapture({
 	rootEl: el,
 	note: appearNote,
 	pureNote: note,
 	isDeletedRef: isDeleted,
+	onReplyCallback: addReplyTo,
 });
 
 useTooltip(renoteButton, async (showing) => {
diff --git a/packages/frontend/src/components/SkNoteSub.vue b/packages/frontend/src/components/SkNoteSub.vue
index f0653d6ec..46f0838bf 100644
--- a/packages/frontend/src/components/SkNoteSub.vue
+++ b/packages/frontend/src/components/SkNoteSub.vue
@@ -4,7 +4,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 -->
 
 <template>
-<div v-if="!muted" ref="el" :class="[$style.root, { [$style.children]: depth > 1 }]">
+<div v-show="!isDeleted" v-if="!muted" ref="el" :class="[$style.root, { [$style.children]: depth > 1 }]">
 	<div v-if="!hideLine" :class="$style.line"></div>
 	<div :class="$style.main">
 		<div v-if="note.channel" :class="$style.colorBar" :style="{ background: note.channel.color }"></div>
@@ -73,7 +73,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 		</div>
 	</div>
 	<template v-if="depth < numberOfReplies">
-		<SkNoteSub v-for="reply in replies" :key="reply.id" :note="reply" :class="[$style.reply, { [$style.single]: replies.length === 1 }]" :detail="true" :depth="depth + 1" :expandAllCws="props.expandAllCws"/>
+		<SkNoteSub v-for="reply in replies" :key="reply.id" :note="reply" :class="[$style.reply, { [$style.single]: replies.length === 1 }]" :detail="true" :depth="depth + 1" :expandAllCws="props.expandAllCws" :onDeleteCallback="removeReply"/>
 	</template>
 	<div v-else :class="$style.more">
 		<MkA class="_link" :to="notePage(note)">{{ i18n.ts.continueThread }} <i class="ph-caret-double-right ph-bold ph-lg"></i></MkA>
@@ -119,6 +119,7 @@ const props = withDefaults(defineProps<{
 	note: Misskey.entities.Note;
 	detail?: boolean;
 	expandAllCws?: boolean;
+	onDeleteCallback?: (id: Misskey.entities.Note['id']) => void;
 
 	// how many notes are in between this one and the note being viewed in detail
 	depth?: number;
@@ -141,6 +142,7 @@ const likeButton = shallowRef<HTMLElement>();
 
 let appearNote = computed(() => isRenote ? props.note.renote as Misskey.entities.Note : props.note);
 const defaultLike = computed(() => defaultStore.state.like ? defaultStore.state.like : null);
+const replies = ref<Misskey.entities.Note[]>([]);
 
 const isRenote = (
 	props.note.renote != null &&
@@ -149,10 +151,26 @@ const isRenote = (
 	props.note.poll == null
 );
 
+async function addReplyTo(replyNote: Misskey.entities.Note) {
+		replies.value.unshift(replyNote);
+		appearNote.value.repliesCount += 1;
+}
+
+async function removeReply(id: Misskey.entities.Note['id']) {
+		const replyIdx = replies.value.findIndex(note => note.id === id);
+		if (replyIdx >= 0) {
+			replies.value.splice(replyIdx, 1);
+			appearNote.value.repliesCount -= 1;
+		}
+}
+
 useNoteCapture({
 	rootEl: el,
 	note: appearNote,
 	isDeletedRef: isDeleted,
+	// only update replies if we are, in fact, showing replies
+	onReplyCallback: props.detail && props.depth < numberOfReplies.value ? addReplyTo : undefined,
+	onDeleteCallback: props.detail && props.depth < numberOfReplies.value ? props.onDeleteCallback : undefined,
 });
 
 if ($i) {
@@ -259,8 +277,6 @@ watch(() => props.expandAllCws, (expandAllCws) => {
 	if (expandAllCws !== showContent.value) showContent.value = expandAllCws;
 });
 
-let replies = ref<Misskey.entities.Note[]>([]);
-
 function boostVisibility() {
 	os.popupMenu([
 		{
diff --git a/packages/frontend/src/scripts/use-note-capture.ts b/packages/frontend/src/scripts/use-note-capture.ts
index ab232598c..427bc6ff3 100644
--- a/packages/frontend/src/scripts/use-note-capture.ts
+++ b/packages/frontend/src/scripts/use-note-capture.ts
@@ -14,6 +14,8 @@ export function useNoteCapture(props: {
 	note: Ref<Misskey.entities.Note>;
 	pureNote: Ref<Misskey.entities.Note>;
 	isDeletedRef: Ref<boolean>;
+	onReplyCallback: (replyNote: Misskey.entities.Note) => void | undefined;
+	onDeleteCallback: (id: Misskey.entities.Note['id']) => void | undefined;
 }) {
 	const note = props.note;
 	const pureNote = props.pureNote !== undefined ? props.pureNote : props.note;
@@ -25,6 +27,17 @@ export function useNoteCapture(props: {
 		if ((id !== note.value.id) && (id !== pureNote.value.id)) return;
 
 		switch (type) {
+			case 'replied': {
+				if (!props.onReplyCallback) break;
+
+				const replyNote = await os.api("notes/show", {
+					noteId: body.id,
+				});
+
+				await props.onReplyCallback(replyNote);
+				break;
+			}
+
 			case 'reacted': {
 				const reaction = body.reaction;
 
@@ -76,6 +89,8 @@ export function useNoteCapture(props: {
 
 			case 'deleted': {
 				props.isDeletedRef.value = true;
+
+				if (props.onDeleteCallback) await props.onDeleteCallback(id);
 				break;
 			}