diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4c9829cc8d..ac912c4edf 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -24,10 +24,12 @@
 - Feat: 今日誕生日のフォロー中のユーザーを一覧表示できるウィジェットを追加
 - Enhance: 絵文字のオートコンプリート機能強化 #12364
 - Enhance: ユーザーのRawデータを表示するページが復活
+- Enhance: リアクション選択時に音を鳴らせるように
 - fix: 「設定のバックアップ」で一部の項目がバックアップに含まれていなかった問題を修正
 - Fix: ウィジェットのジョブキューにて音声の発音方法変更に追従できていなかったのを修正 #12367
 - Fix: コードエディタが正しく表示されない問題を修正
 - Fix: プロフィールの「ファイル」にセンシティブな画像がある際のデザインを修正
+- Fix: 一度に大量の通知が入った際に通知音が音割れする問題を修正
 
 ### Server
 - Enhance: MFM `$[ruby ]` が他ソフトウェアと連合されるように
diff --git a/locales/index.d.ts b/locales/index.d.ts
index 2ea9d116e1..9f1a8c7761 100644
--- a/locales/index.d.ts
+++ b/locales/index.d.ts
@@ -1943,6 +1943,7 @@ export interface Locale {
         "notification": string;
         "antenna": string;
         "channel": string;
+        "reaction": string;
     };
     "_ago": {
         "future": string;
diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index d78c949c7b..c2482e5a74 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -1848,6 +1848,7 @@ _sfx:
   notification: "通知"
   antenna: "アンテナ受信"
   channel: "チャンネル通知"
+  reaction: "リアクション選択時"
 
 _ago:
   future: "未来"
diff --git a/packages/backend/src/server/api/endpoints/notes/featured.ts b/packages/backend/src/server/api/endpoints/notes/featured.ts
index c456874309..bc6cbe242f 100644
--- a/packages/backend/src/server/api/endpoints/notes/featured.ts
+++ b/packages/backend/src/server/api/endpoints/notes/featured.ts
@@ -64,16 +64,16 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				}
 			}
 
-			if (noteIds.length === 0) {
-				return [];
-			}
-
 			noteIds.sort((a, b) => a > b ? -1 : 1);
 			if (ps.untilId) {
 				noteIds = noteIds.filter(id => id < ps.untilId!);
 			}
 			noteIds = noteIds.slice(0, ps.limit);
 
+			if (noteIds.length === 0) {
+				return [];
+			}
+
 			const query = this.notesRepository.createQueryBuilder('note')
 				.where('note.id IN (:...noteIds)', { noteIds: noteIds })
 				.innerJoinAndSelect('note.user', 'user')
diff --git a/packages/frontend/assets/sounds/syuilo/bubble1.mp3 b/packages/frontend/assets/sounds/syuilo/bubble1.mp3
new file mode 100644
index 0000000000..05b8ef8b10
Binary files /dev/null and b/packages/frontend/assets/sounds/syuilo/bubble1.mp3 differ
diff --git a/packages/frontend/assets/sounds/syuilo/bubble2.mp3 b/packages/frontend/assets/sounds/syuilo/bubble2.mp3
new file mode 100644
index 0000000000..8b4f8df6e9
Binary files /dev/null and b/packages/frontend/assets/sounds/syuilo/bubble2.mp3 differ
diff --git a/packages/frontend/src/components/MkNote.vue b/packages/frontend/src/components/MkNote.vue
index 6349df2e30..d047495dc9 100644
--- a/packages/frontend/src/components/MkNote.vue
+++ b/packages/frontend/src/components/MkNote.vue
@@ -163,6 +163,7 @@ import { focusPrev, focusNext } from '@/scripts/focus.js';
 import { checkWordMute } from '@/scripts/check-word-mute.js';
 import { userPage } from '@/filters/user.js';
 import * as os from '@/os.js';
+import * as sound from '@/scripts/sound.js';
 import { defaultStore, noteViewInterruptors } from '@/store.js';
 import { reactionPicker } from '@/scripts/reaction-picker.js';
 import { extractUrlFromMfm } from '@/scripts/extract-url-from-mfm.js';
@@ -336,6 +337,8 @@ function react(viaKeyboard = false): void {
 	pleaseLogin();
 	showMovedDialog();
 	if (appearNote.reactionAcceptance === 'likeOnly') {
+		sound.play('reaction');
+
 		if (props.mock) {
 			return;
 		}
@@ -354,6 +357,8 @@ function react(viaKeyboard = false): void {
 	} else {
 		blur();
 		reactionPicker.show(reactButton.value, reaction => {
+			sound.play('reaction');
+
 			if (props.mock) {
 				emit('reaction', reaction);
 				return;
diff --git a/packages/frontend/src/components/MkNoteDetailed.vue b/packages/frontend/src/components/MkNoteDetailed.vue
index d1bc3f676f..d8089ac36f 100644
--- a/packages/frontend/src/components/MkNoteDetailed.vue
+++ b/packages/frontend/src/components/MkNoteDetailed.vue
@@ -210,6 +210,7 @@ import { checkWordMute } from '@/scripts/check-word-mute.js';
 import { userPage } from '@/filters/user.js';
 import { notePage } from '@/filters/note.js';
 import * as os from '@/os.js';
+import * as sound from '@/scripts/sound.js';
 import { defaultStore, noteViewInterruptors } from '@/store.js';
 import { reactionPicker } from '@/scripts/reaction-picker.js';
 import { extractUrlFromMfm } from '@/scripts/extract-url-from-mfm.js';
@@ -369,6 +370,8 @@ function react(viaKeyboard = false): void {
 	pleaseLogin();
 	showMovedDialog();
 	if (appearNote.reactionAcceptance === 'likeOnly') {
+		sound.play('reaction');
+
 		os.api('notes/reactions/create', {
 			noteId: appearNote.id,
 			reaction: '❤️',
@@ -383,6 +386,8 @@ function react(viaKeyboard = false): void {
 	} else {
 		blur();
 		reactionPicker.show(reactButton.value, reaction => {
+			sound.play('reaction');
+
 			os.api('notes/reactions/create', {
 				noteId: appearNote.id,
 				reaction: reaction,
diff --git a/packages/frontend/src/components/MkReactionsViewer.reaction.vue b/packages/frontend/src/components/MkReactionsViewer.reaction.vue
index 9a107c3674..65a5c2374e 100644
--- a/packages/frontend/src/components/MkReactionsViewer.reaction.vue
+++ b/packages/frontend/src/components/MkReactionsViewer.reaction.vue
@@ -28,6 +28,7 @@ import MkReactionEffect from '@/components/MkReactionEffect.vue';
 import { claimAchievement } from '@/scripts/achievements.js';
 import { defaultStore } from '@/store.js';
 import { i18n } from '@/i18n.js';
+import * as sound from '@/scripts/sound.js';
 
 const props = defineProps<{
 	reaction: string;
@@ -59,6 +60,10 @@ async function toggleReaction() {
 		});
 		if (confirm.canceled) return;
 
+		if (oldReaction !== props.reaction) {
+			sound.play('reaction');
+		}
+
 		if (mock) {
 			emit('reactionToggled', props.reaction, (props.count - 1));
 			return;
@@ -75,6 +80,8 @@ async function toggleReaction() {
 			}
 		});
 	} else {
+		sound.play('reaction');
+
 		if (mock) {
 			emit('reactionToggled', props.reaction, (props.count + 1));
 			return;
diff --git a/packages/frontend/src/pages/settings/sounds.vue b/packages/frontend/src/pages/settings/sounds.vue
index cd1707a594..244bb1e0e2 100644
--- a/packages/frontend/src/pages/settings/sounds.vue
+++ b/packages/frontend/src/pages/settings/sounds.vue
@@ -38,7 +38,7 @@ import { defaultStore } from '@/store.js';
 
 const masterVolume = computed(defaultStore.makeGetterSetter('sound_masterVolume'));
 
-const soundsKeys = ['note', 'noteMy', 'notification', 'antenna', 'channel'] as const;
+const soundsKeys = ['note', 'noteMy', 'notification', 'antenna', 'channel', 'reaction'] as const;
 
 const sounds = ref<Record<typeof soundsKeys[number], Ref<any>>>({
 	note: defaultStore.reactiveState.sound_note,
@@ -46,6 +46,7 @@ const sounds = ref<Record<typeof soundsKeys[number], Ref<any>>>({
 	notification: defaultStore.reactiveState.sound_notification,
 	antenna: defaultStore.reactiveState.sound_antenna,
 	channel: defaultStore.reactiveState.sound_channel,
+	reaction: defaultStore.reactiveState.sound_reaction,
 });
 
 async function updated(type: keyof typeof sounds.value, sound) {
diff --git a/packages/frontend/src/scripts/sound.ts b/packages/frontend/src/scripts/sound.ts
index 2b604bd98a..d28d629227 100644
--- a/packages/frontend/src/scripts/sound.ts
+++ b/packages/frontend/src/scripts/sound.ts
@@ -5,8 +5,9 @@
 
 import { defaultStore } from '@/store.js';
 
-const ctx = new AudioContext();
+let ctx: AudioContext;
 const cache = new Map<string, AudioBuffer>();
+let canPlay = true;
 
 export const soundsTypes = [
 	null,
@@ -38,6 +39,8 @@ export const soundsTypes = [
 	'syuilo/waon',
 	'syuilo/popo',
 	'syuilo/triple',
+	'syuilo/bubble1',
+	'syuilo/bubble2',
 	'syuilo/poi1',
 	'syuilo/poi2',
 	'syuilo/pirori',
@@ -62,6 +65,9 @@ export const soundsTypes = [
 ] as const;
 
 export async function loadAudio(file: string, useCache = true) {
+	if (ctx == null) {
+		ctx = new AudioContext();
+	}
 	if (useCache && cache.has(file)) {
 		return cache.get(file)!;
 	}
@@ -77,11 +83,18 @@ export async function loadAudio(file: string, useCache = true) {
 	return audioBuffer;
 }
 
-export function play(type: 'noteMy' | 'note' | 'antenna' | 'channel' | 'notification') {
+export function play(type: 'noteMy' | 'note' | 'antenna' | 'channel' | 'notification' | 'reaction') {
 	const sound = defaultStore.state[`sound_${type}`];
 	if (_DEV_) console.log('play', type, sound);
-	if (sound.type == null) return;
-	playFile(sound.type, sound.volume);
+	if (sound.type == null || !canPlay) return;
+
+	canPlay = false;
+	playFile(sound.type, sound.volume).then(() => {
+		// ごく短時間に音が重複しないように
+		setTimeout(() => {
+			canPlay = true;
+		}, 25);
+	});
 }
 
 export async function playFile(file: string, volume: number) {
diff --git a/packages/frontend/src/store.ts b/packages/frontend/src/store.ts
index 12660e9e8d..f2ed4e7c0b 100644
--- a/packages/frontend/src/store.ts
+++ b/packages/frontend/src/store.ts
@@ -411,6 +411,10 @@ export const defaultStore = markRaw(new Storage('base', {
 		where: 'device',
 		default: { type: 'syuilo/square-pico', volume: 1 },
 	},
+	sound_reaction: {
+		where: 'device',
+		default: { type: 'syuilo/bubble2', volume: 1 },
+	},
 }));
 
 // TODO: 他のタブと永続化されたstateを同期
diff --git a/packages/frontend/src/widgets/WidgetJobQueue.vue b/packages/frontend/src/widgets/WidgetJobQueue.vue
index fa82997570..8c990e8e49 100644
--- a/packages/frontend/src/widgets/WidgetJobQueue.vue
+++ b/packages/frontend/src/widgets/WidgetJobQueue.vue
@@ -58,6 +58,7 @@ import { useStream } from '@/stream.js';
 import number from '@/filters/number.js';
 import * as sound from '@/scripts/sound.js';
 import { deepClone } from '@/scripts/clone.js';
+import { defaultStore } from '@/store.js';
 
 const name = 'jobQueue';
 
@@ -102,7 +103,9 @@ const prev = reactive({} as typeof current);
 let jammedAudioBuffer: AudioBuffer | null = $ref(null);
 let jammedSoundNodePlaying: boolean = $ref(false);
 
-sound.loadAudio('syuilo/queue-jammed').then(buf => jammedAudioBuffer = buf);
+if (defaultStore.state.sound_masterVolume) {
+	sound.loadAudio('syuilo/queue-jammed').then(buf => jammedAudioBuffer = buf);
+}
 
 for (const domain of ['inbox', 'deliver']) {
 	prev[domain] = deepClone(current[domain]);