diff --git a/packages/frontend/src/components/MkNote.vue b/packages/frontend/src/components/MkNote.vue
index 0319eb61d6..122d29eff3 100644
--- a/packages/frontend/src/components/MkNote.vue
+++ b/packages/frontend/src/components/MkNote.vue
@@ -84,7 +84,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 				</div>
 				<MkA v-if="appearNote.channel && !inChannel" :class="$style.channel" :to="`/channels/${appearNote.channel.id}`"><i class="ti ti-device-tv"></i> {{ appearNote.channel.name }}</MkA>
 			</div>
-			<MkReactionsViewer :note="appearNote" :maxNumber="16" :mock="mock">
+			<MkReactionsViewer :note="appearNote" :maxNumber="16" :mock="mock" @mockUpdateMyReaction="emitUpdReaction">
 				<template #more>
 					<div :class="$style.reactionOmitted">{{ i18n.ts.more }}</div>
 				</template>
@@ -545,6 +545,14 @@ function readPromo() {
 	});
 	isDeleted.value = true;
 }
+
+function emitUpdReaction(emoji: string, delta: number) {
+	if (delta < 0) {
+		emit('removeReaction', emoji);
+	} else if (delta > 0) {
+		emit('reaction', emoji);
+	}
+}
 </script>
 
 <style lang="scss" module>
diff --git a/packages/frontend/src/components/MkReactionsViewer.reaction.vue b/packages/frontend/src/components/MkReactionsViewer.reaction.vue
index 5dc19db85f..4c97899739 100644
--- a/packages/frontend/src/components/MkReactionsViewer.reaction.vue
+++ b/packages/frontend/src/components/MkReactionsViewer.reaction.vue
@@ -37,6 +37,10 @@ const props = defineProps<{
 	mock?: boolean;
 }>();
 
+const emit = defineEmits<{
+	(ev: 'reactionToggled', emoji: string, newCount: number): void;
+}>();
+
 const buttonEl = shallowRef<HTMLElement>();
 
 const canToggle = computed(() => !props.reaction.match(/@\w/) && $i);
@@ -52,7 +56,12 @@ async function toggleReaction() {
 			type: 'warning',
 			text: oldReaction !== props.reaction ? i18n.ts.changeReactionConfirm : i18n.ts.cancelReactionConfirm,
 		});
-		if (confirm.canceled || props.mock) return;
+		if (confirm.canceled) return;
+
+		if (props.mock) {
+			emit('reactionToggled', props.reaction, (props.count - 1));
+			return;
+		}
 
 		os.api('notes/reactions/delete', {
 			noteId: props.note.id,
@@ -65,6 +74,11 @@ async function toggleReaction() {
 			}
 		});
 	} else {
+		if (props.mock) {
+			emit('reactionToggled', props.reaction, (props.count + 1));
+			return;
+		}
+
 		os.api('notes/reactions/create', {
 			noteId: props.note.id,
 			reaction: props.reaction,
diff --git a/packages/frontend/src/components/MkReactionsViewer.vue b/packages/frontend/src/components/MkReactionsViewer.vue
index 4ec061a86a..2c982ff063 100644
--- a/packages/frontend/src/components/MkReactionsViewer.vue
+++ b/packages/frontend/src/components/MkReactionsViewer.vue
@@ -12,7 +12,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 	:moveClass="defaultStore.state.animation ? $style.transition_x_move : ''"
 	tag="div" :class="$style.root"
 >
-	<XReaction v-for="[reaction, count] in reactions" :key="reaction" :reaction="reaction" :count="count" :isInitial="initialReactions.has(reaction)" :note="note" :mock="mock"/>
+	<XReaction v-for="[reaction, count] in reactions" :key="reaction" :reaction="reaction" :count="count" :isInitial="initialReactions.has(reaction)" :note="note" :mock="mock" @reactionToggled="onMockToggleReaction"/>
 	<slot v-if="hasMoreReactions" name="more"/>
 </TransitionGroup>
 </template>
@@ -32,6 +32,10 @@ const props = withDefaults(defineProps<{
 	mock: false,
 });
 
+const emit = defineEmits<{
+	(ev: 'mockUpdateMyReaction', emoji: string, delta: number): void;
+}>();
+
 const initialReactions = new Set(Object.keys(props.note.reactions));
 
 let reactions = $ref<[string, number][]>([]);
@@ -41,6 +45,15 @@ if (props.note.myReaction && !Object.keys(reactions).includes(props.note.myReact
 	reactions[props.note.myReaction] = props.note.reactions[props.note.myReaction];
 }
 
+function onMockToggleReaction(emoji: string, count: number) {
+	if (!props.mock) return;
+
+	const i = reactions.findIndex((item) => item[0] === emoji);
+	if (i < 0) return;
+
+	emit('mockUpdateMyReaction', emoji, (count - reactions[i][1]));
+}
+
 watch([() => props.note.reactions, () => props.maxNumber], ([newSource, maxNumber]) => {
 	let newReactions: [string, number][] = [];
 	hasMoreReactions = Object.keys(newSource).length > maxNumber;
diff --git a/packages/frontend/src/components/MkTutorialDialog.Note.vue b/packages/frontend/src/components/MkTutorialDialog.Note.vue
index 861b5e76f3..81ce0f6630 100644
--- a/packages/frontend/src/components/MkTutorialDialog.Note.vue
+++ b/packages/frontend/src/components/MkTutorialDialog.Note.vue
@@ -17,7 +17,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 <div v-else-if="phase === 'howToReact'" class="_gaps">
 	<div style="text-align: center; padding: 0 16px;">{{ i18n.ts._initialTutorial._reaction.description }}</div>
 	<div>{{ i18n.ts._initialTutorial._reaction.letsTryReacting }}</div>
-	<MkNote :class="$style.exampleNoteRoot" :note="exampleNote" :mock="true" @reaction="addReaction" @removeReaction="removeReaction"/>
+	<MkNote :class="$style.exampleNoteRoot" :note="exampleNote" :mock="true" @reaction="addReaction" @removeReaction="removeReaction" @updateReaction="updateReaction"/>
 	<div v-if="onceReacted"><b style="color: var(--accent);"><i class="ti ti-check"></i> {{ i18n.ts._initialTutorial.wellDone }}</b> {{ i18n.ts._initialTutorial._reaction.reactNotification }}<br>{{ i18n.ts._initialTutorial._reaction.reactDone }}</div>
 </div>
 </template>