diff --git a/packages/backend/migration/1743894419864-AddMusicFieldsToMeta.js b/packages/backend/migration/1743894419864-AddMusicFieldsToMeta.js
new file mode 100644
index 0000000000..9cbf6d7443
--- /dev/null
+++ b/packages/backend/migration/1743894419864-AddMusicFieldsToMeta.js
@@ -0,0 +1,20 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { MigrationInterface, QueryRunner } from "typeorm";
+
+export class AddMusicFieldsToMeta1743894419864 implements MigrationInterface {
+    name = 'AddMusicFieldsToMeta1743894419864'
+
+    public async up(queryRunner: QueryRunner): Promise<void> {
+        await queryRunner.query(`ALTER TABLE "meta" ADD "musicSource" character varying(1024)`);
+        await queryRunner.query(`ALTER TABLE "meta" ADD "musicEnabled" boolean NOT NULL DEFAULT false`);
+    }
+
+    public async down(queryRunner: QueryRunner): Promise<void> {
+        await queryRunner.query(`ALTER TABLE "meta" DROP COLUMN "musicEnabled"`);
+        await queryRunner.query(`ALTER TABLE "meta" DROP COLUMN "musicSource"`);
+    }
+}
diff --git a/packages/backend/src/core/entities/MetaEntityService.ts b/packages/backend/src/core/entities/MetaEntityService.ts
index a2d2ee8528..750cdb9115 100644
--- a/packages/backend/src/core/entities/MetaEntityService.ts
+++ b/packages/backend/src/core/entities/MetaEntityService.ts
@@ -114,6 +114,8 @@ export class MetaEntityService {
 			sidebarLogoUrl: instance.sidebarLogoUrl,
 			backgroundImageUrl: instance.backgroundImageUrl,
 			logoImageUrl: instance.logoImageUrl,
+			musicSource: instance.musicSource,
+			musicEnabled: instance.musicEnabled,
 			maxNoteTextLength: this.config.maxNoteLength,
 			maxRemoteNoteTextLength: this.config.maxRemoteNoteLength,
 			maxCwLength: this.config.maxCwLength,
diff --git a/packages/backend/src/models/Meta.ts b/packages/backend/src/models/Meta.ts
index 6276e47618..09fac44c8c 100644
--- a/packages/backend/src/models/Meta.ts
+++ b/packages/backend/src/models/Meta.ts
@@ -142,6 +142,17 @@ export class MiMeta {
 	@Column('boolean', {
 		default: false,
 	})
+	public musicSource: string | null;
+
+	@Column('boolean', {
+		default: false,
+	})
+	public musicEnabled: boolean;
+
+	@Column('varchar', {
+		length: 1024,
+		nullable: true,
+	})
 	public iconUrl: string | null;
 
 	@Column('varchar', {
diff --git a/packages/backend/src/models/json-schema/meta.ts b/packages/backend/src/models/json-schema/meta.ts
index 10334f1b78..8b78512bd9 100644
--- a/packages/backend/src/models/json-schema/meta.ts
+++ b/packages/backend/src/models/json-schema/meta.ts
@@ -321,6 +321,14 @@ export const packedMetaLiteSchema = {
 			type: 'string',
 			optional: false, nullable: true,
 		},
+		musicSource: {
+			type: 'string',
+			optional: false, nullable: true,
+		},
+		musicEnabled: {
+			type: 'boolean',
+			optional: false, nullable: false,
+		},
 		privacyPolicyUrl: {
 			type: 'string',
 			optional: false, nullable: true,
diff --git a/packages/backend/src/server/api/endpoints/admin/meta.ts b/packages/backend/src/server/api/endpoints/admin/meta.ts
index 35e455bab8..54ec3582de 100644
--- a/packages/backend/src/server/api/endpoints/admin/meta.ts
+++ b/packages/backend/src/server/api/endpoints/admin/meta.ts
@@ -453,6 +453,14 @@ export const meta = {
 				type: 'string',
 				optional: false, nullable: true,
 			},
+			musicSource: {
+				type: 'string',
+				optional: false, nullable: true,
+			},
+			musicEnabled: {
+				type: 'boolean',
+				optional: false, nullable: false,
+			},
 			translationTimeout: {
 				type: 'number',
 				optional: false, nullable: false,
@@ -696,6 +704,8 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				app512IconUrl: instance.app512IconUrl,
 				sidebarLogoUrl: instance.sidebarLogoUrl,
 				backgroundImageUrl: instance.backgroundImageUrl,
+				musicSource: instance.musicSource,
+				musicEnabled: instance.musicEnabled,
 				logoImageUrl: instance.logoImageUrl,
 				defaultLightTheme: instance.defaultLightTheme,
 				defaultDarkTheme: instance.defaultDarkTheme,
diff --git a/packages/backend/src/server/api/endpoints/admin/update-meta.ts b/packages/backend/src/server/api/endpoints/admin/update-meta.ts
index 4868fceb89..d279d93820 100644
--- a/packages/backend/src/server/api/endpoints/admin/update-meta.ts
+++ b/packages/backend/src/server/api/endpoints/admin/update-meta.ts
@@ -63,6 +63,8 @@ export const paramDef = {
 		app512IconUrl: { type: 'string', nullable: true },
 		sidebarLogoUrl: { type: 'string', nullable: true },
 		backgroundImageUrl: { type: 'string', nullable: true },
+		musicSource: { type: 'string', nullable: true },
+		musicEnabled: { type: 'boolean', nullable: false },
 		logoImageUrl: { type: 'string', nullable: true },
 		name: { type: 'string', nullable: true },
 		shortName: { type: 'string', nullable: true },
@@ -316,6 +318,14 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				set.backgroundImageUrl = ps.backgroundImageUrl;
 			}
 
+			if (ps.musicEnabled !== undefined) {
+				set.musicEnabled = ps.musicEnabled;
+			}
+
+			if (ps.musicSource !== undefined) {
+				set.musicSource = ps.musicSource;
+			}
+
 			if (ps.logoImageUrl !== undefined) {
 				set.logoImageUrl = ps.logoImageUrl;
 			}
diff --git a/packages/frontend/src/components/MkVisitorDashboard.vue b/packages/frontend/src/components/MkVisitorDashboard.vue
index 942085f7bb..4f3b94e0e5 100644
--- a/packages/frontend/src/components/MkVisitorDashboard.vue
+++ b/packages/frontend/src/components/MkVisitorDashboard.vue
@@ -5,6 +5,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 
 <template>
 <div v-if="instance" :class="$style.root">
+	<PwVisitorMusic/>
 	<div :class="[$style.main, $style.panel]">
 		<img :src="instance.sidebarLogoUrl || instance.iconUrl || '/apple-touch-icon.png'" alt="" :class="instance.sidebarLogoUrl ? $style.wideIcon : $style.mainIcon"/>
 		<button class="_button _acrylic" :class="$style.mainMenu" @click="showMenu"><i class="ti ti-dots"></i></button>
@@ -61,6 +62,7 @@ import * as Misskey from 'misskey-js';
 import sanitizeHtml from '@/utility/sanitize-html.js';
 import XSigninDialog from '@/components/MkSigninDialog.vue';
 import XSignupDialog from '@/components/MkSignupDialog.vue';
+import PwVisitorMusic from '@/components/PwVisitorMusic.vue';
 import MkButton from '@/components/MkButton.vue';
 import MkTimeline from '@/components/MkTimeline.vue';
 import MkInfo from '@/components/MkInfo.vue';
diff --git a/packages/frontend/src/components/PwVisitorMusic.vue b/packages/frontend/src/components/PwVisitorMusic.vue
new file mode 100644
index 0000000000..d23f1481a5
--- /dev/null
+++ b/packages/frontend/src/components/PwVisitorMusic.vue
@@ -0,0 +1,30 @@
+<template v-if="instance">
+	<audio v-if="instance.musicEnabled" ref="audioRef" :src="instance.musicSource" loop></audio>
+</template>
+
+<script lang="ts" setup>
+import { computed, ref, onMounted, onUnmounted } from 'vue';
+import { instance } from '@/instance.js';
+
+const audioRef = ref<HTMLAudioElement | null>(null);
+const hasPlayed = ref(false);
+
+const playMusic = () => {
+	if (audioRef.value && !hasPlayed.value && instance.musicEnabled) {
+		audioRef.value.volume = 0.2;
+		audioRef.value.play().catch(() => {
+			// Ignore autoplay errors
+		});
+		hasPlayed.value = true;
+		document.removeEventListener('click', playMusic);
+	}
+};
+
+onMounted(() => {
+	document.addEventListener('click', playMusic);
+});
+
+onUnmounted(() => {
+	document.removeEventListener('click', playMusic);
+});
+</script>
diff --git a/packages/frontend/src/pages/admin/branding.vue b/packages/frontend/src/pages/admin/branding.vue
index 64faf49848..89f19e9d27 100644
--- a/packages/frontend/src/pages/admin/branding.vue
+++ b/packages/frontend/src/pages/admin/branding.vue
@@ -54,6 +54,16 @@ SPDX-License-Identifier: AGPL-3.0-only
 					<template #label>{{ i18n.ts.backgroundImageUrl }}</template>
 				</MkInput>
 
+					<MkSwitch v-model="musicEnabled">
+						<template #label>Enable Login Music</template>
+						<template #caption>Play music when users visit the login page</template>
+					</MkSwitch>
+
+					<MkInput v-model="musicSource" type="url">
+						<template #prefix><i class="ti ti-link"></i></template>
+						<template #label>Login Music URL</template>
+					</MkInput>
+
 				<FromSlot>
 					<template #label>{{ i18n.ts.defaultLike }}</template>
 					<MkCustomEmoji v-if="defaultLike.startsWith(':')" style="max-height: 3em; font-size: 1.1em;" :useOriginalSize="false" :name="defaultLike" :normal="true" :noStyle="true"/>
@@ -129,6 +139,7 @@ import { misskeyApi } from '@/utility/misskey-api.js';
 import { instance, fetchInstance } from '@/instance.js';
 import { i18n } from '@/i18n.js';
 import { definePage } from '@/page.js';
+import MkSwitch from '@/components/MkSwitch.vue';
 import MkButton from '@/components/MkButton.vue';
 import MkColorInput from '@/components/MkColorInput.vue';
 
@@ -138,6 +149,8 @@ const app192IconUrl = ref<string | null>(null);
 const app512IconUrl = ref<string | null>(null);
 const bannerUrl = ref<string | null>(null);
 const backgroundImageUrl = ref<string | null>(null);
+const musicSource = ref<string | null>(null);
+const musicEnabled = ref<boolean>(false);
 const themeColor = ref<string | null>(null);
 const defaultLightTheme = ref<string | null>(null);
 const defaultDarkTheme = ref<string | null>(null);
@@ -157,6 +170,8 @@ async function init() {
 	app512IconUrl.value = meta.app512IconUrl;
 	bannerUrl.value = meta.bannerUrl;
 	backgroundImageUrl.value = meta.backgroundImageUrl;
+	musicSource.value = meta.musicSource;
+	musicEnabled.value = meta.musicEnabled;
 	themeColor.value = meta.themeColor;
 	defaultLightTheme.value = meta.defaultLightTheme;
 	defaultDarkTheme.value = meta.defaultDarkTheme;
@@ -177,6 +192,8 @@ function save() {
 		app512IconUrl: app512IconUrl.value,
 		bannerUrl: bannerUrl.value,
 		backgroundImageUrl: backgroundImageUrl.value,
+		musicSource: musicSource.value,
+		musicEnabled: musicEnabled.value,
 		themeColor: themeColor.value === '' ? null : themeColor.value,
 		defaultLightTheme: defaultLightTheme.value === '' ? null : defaultLightTheme.value,
 		defaultDarkTheme: defaultDarkTheme.value === '' ? null : defaultDarkTheme.value,