diff --git a/locales/en-US.yml b/locales/en-US.yml
index bd8e60e6a..e83883d3c 100644
--- a/locales/en-US.yml
+++ b/locales/en-US.yml
@@ -1269,6 +1269,33 @@ keepOriginalFilenameDescription: "If you turn off this setting, files names will
 noDescription: "There is not the explanation"
 alwaysConfirmFollow: "Always confirm when following"
 inquiry: "Contact"
+tryAgain: "Please try again later"
+confirmWhenRevealingSensitiveMedia: "Confirm when revealing sensitive media"
+sensitiveMediaRevealConfirm: "This might be a sensitive media. Are you sure to reveal?"
+createdLists: "Created lists"
+createdAntennas: "Created antennas"
+fromX: "From {x}"
+genEmbedCode: "Generate embed code"
+noteOfThisUser: "Notes by this user"
+clipNoteLimitExceeded: "No more notes can be added to this clip."
+performance: "Performance"
+modified: "Modified"
+discard: "Discard"
+thereAreNChanges: "There are {n} change(s)"
+signinWithPasskey: "Sign in with Passkey"
+unknownWebAuthnKey: "Unknown Passkey"
+passkeyVerificationFailed: "Passkey verification has failed."
+passkeyVerificationSucceededButPasswordlessLoginDisabled: "Passkey verification has succeeded but password-less login is disabled."
+messageToFollower: "Message to followers"
+target: "Target"
+testCaptchaWarning: "This function is intended for CAPTCHA testing purposes.\n<strong>Do not use in a production environment.</strong>"
+prohibitedWordsForNameOfUser: "Prohibited words for user names"
+prohibitedWordsForNameOfUserDescription: "If any of the strings in this list are included in the user's name, the name will be denied. Users with moderator privileges are not affected by this restriction."
+yourNameContainsProhibitedWords: "Your name contains prohibited words"
+yourNameContainsProhibitedWordsDescription: "If you wish to use this name, please contact your server administrator."
+thisContentsAreMarkedAsSigninRequiredByAuthor: "Set by the author to require login to view"
+lockdown: "Lockdown"
+pleaseSelectAccount: "Select an account"
 here: "here"
 mutualLink: "Mutual Link"
 saveThisFile: "Save this file to Drive"
@@ -2184,8 +2211,11 @@ _auth:
   permissionAsk: "This application requests the following permissions"
   pleaseGoBack: "Please go back to the application"
   callback: "Returning to the application"
+  accepted: "Access granted"
   denied: "Access denied"
+  scopeUser: "Operate as the following user"
   pleaseLogin: "Please log in to authorize applications."
+  byClickingYouWillBeRedirectedToThisUrl: "When access is granted, you will automatically be redirected to the following URL"
 _antennaSources:
   all: "All notes"
   homeTimeline: "Notes from followed users"
diff --git a/locales/index.d.ts b/locales/index.d.ts
index 3c2838b77..1dd4f537a 100644
--- a/locales/index.d.ts
+++ b/locales/index.d.ts
@@ -5114,6 +5114,114 @@ export interface Locale extends ILocale {
      * お問い合わせ
      */
     "inquiry": string;
+    /**
+     * もう一度お試しください。
+     */
+    "tryAgain": string;
+    /**
+     * センシティブなメディアを表示するとき確認する
+     */
+    "confirmWhenRevealingSensitiveMedia": string;
+    /**
+     * センシティブなメディアです。表示しますか？
+     */
+    "sensitiveMediaRevealConfirm": string;
+    /**
+     * 作成したリスト
+     */
+    "createdLists": string;
+    /**
+     * 作成したアンテナ
+     */
+    "createdAntennas": string;
+    /**
+     * {x}から
+     */
+    "fromX": ParameterizedString<"x">;
+    /**
+     * 埋め込みコードを生成
+     */
+    "genEmbedCode": string;
+    /**
+     * このユーザーのノート一覧
+     */
+    "noteOfThisUser": string;
+    /**
+     * これ以上このクリップにノートを追加できません。
+     */
+    "clipNoteLimitExceeded": string;
+    /**
+     * パフォーマンス
+     */
+    "performance": string;
+    /**
+     * 変更あり
+     */
+    "modified": string;
+    /**
+     * 破棄
+     */
+    "discard": string;
+    /**
+     * {n}件の変更があります
+     */
+    "thereAreNChanges": ParameterizedString<"n">;
+    /**
+     * パスキーでログイン
+     */
+    "signinWithPasskey": string;
+    /**
+     * 登録されていないパスキーです。
+     */
+    "unknownWebAuthnKey": string;
+    /**
+     * パスキーの検証に失敗しました。
+     */
+    "passkeyVerificationFailed": string;
+    /**
+     * パスキーの検証に成功しましたが、パスワードレスログインが無効になっています。
+     */
+    "passkeyVerificationSucceededButPasswordlessLoginDisabled": string;
+    /**
+     * フォロワーへのメッセージ
+     */
+    "messageToFollower": string;
+    /**
+     * 対象
+     */
+    "target": string;
+    /**
+     * CAPTCHAのテストを目的とした機能です。<strong>本番環境で使用しないでください。</strong>
+     */
+    "testCaptchaWarning": string;
+    /**
+     * 禁止ワード（ユーザーの名前）
+     */
+    "prohibitedWordsForNameOfUser": string;
+    /**
+     * このリストに含まれる文字列がユーザーの名前に含まれる場合、ユーザーの名前の変更を拒否します。モデレーター権限を持つユーザーはこの制限の影響を受けません。
+     */
+    "prohibitedWordsForNameOfUserDescription": string;
+    /**
+     * 変更しようとした名前に禁止された文字列が含まれています
+     */
+    "yourNameContainsProhibitedWords": string;
+    /**
+     * 名前に禁止されている文字列が含まれています。この名前を使用したい場合は、サーバー管理者にお問い合わせください。
+     */
+    "yourNameContainsProhibitedWordsDescription": string;
+    /**
+     * 投稿者により、表示にはログインが必要と設定されています
+     */
+    "thisContentsAreMarkedAsSigninRequiredByAuthor": string;
+    /**
+     * ロックダウン
+     */
+    "lockdown": string;
+    /**
+     * アカウントを選択してください
+     */
+    "pleaseSelectAccount": string;
     /**
      * 通報の種類
      */
@@ -8525,14 +8633,26 @@ export interface Locale extends ILocale {
          * アプリケーションに戻っています
          */
         "callback": string;
+        /**
+         * アクセスを許可しました
+         */
+        "accepted": string;
         /**
          * アクセスを拒否しました
          */
         "denied": string;
+        /**
+         * 以下のユーザーとして操作しています
+         */
+        "scopeUser": string;
         /**
          * アプリケーションにアクセス許可を与えるには、ログインが必要です。
          */
         "pleaseLogin": string;
+        /**
+         * アクセスを許可すると、自動で以下のURLに遷移します
+         */
+        "byClickingYouWillBeRedirectedToThisUrl": string;
     };
     "_antennaSources": {
         /**
diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index 9e0663d58..7d34da16b 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -1273,6 +1273,33 @@ keepOriginalFilenameDescription: "この設定をオフにすると、アップ
 noDescription: "説明文はありません"
 alwaysConfirmFollow: "フォローの際常に確認する"
 inquiry: "お問い合わせ"
+tryAgain: "もう一度お試しください。"
+confirmWhenRevealingSensitiveMedia: "センシティブなメディアを表示するとき確認する"
+sensitiveMediaRevealConfirm: "センシティブなメディアです。表示しますか？"
+createdLists: "作成したリスト"
+createdAntennas: "作成したアンテナ"
+fromX: "{x}から"
+genEmbedCode: "埋め込みコードを生成"
+noteOfThisUser: "このユーザーのノート一覧"
+clipNoteLimitExceeded: "これ以上このクリップにノートを追加できません。"
+performance: "パフォーマンス"
+modified: "変更あり"
+discard: "破棄"
+thereAreNChanges: "{n}件の変更があります"
+signinWithPasskey: "パスキーでログイン"
+unknownWebAuthnKey: "登録されていないパスキーです。"
+passkeyVerificationFailed: "パスキーの検証に失敗しました。"
+passkeyVerificationSucceededButPasswordlessLoginDisabled: "パスキーの検証に成功しましたが、パスワードレスログインが無効になっています。"
+messageToFollower: "フォロワーへのメッセージ"
+target: "対象"
+testCaptchaWarning: "CAPTCHAのテストを目的とした機能です。<strong>本番環境で使用しないでください。</strong>"
+prohibitedWordsForNameOfUser: "禁止ワード（ユーザーの名前）"
+prohibitedWordsForNameOfUserDescription: "このリストに含まれる文字列がユーザーの名前に含まれる場合、ユーザーの名前の変更を拒否します。モデレーター権限を持つユーザーはこの制限の影響を受けません。"
+yourNameContainsProhibitedWords: "変更しようとした名前に禁止された文字列が含まれています"
+yourNameContainsProhibitedWordsDescription: "名前に禁止されている文字列が含まれています。この名前を使用したい場合は、サーバー管理者にお問い合わせください。"
+thisContentsAreMarkedAsSigninRequiredByAuthor: "投稿者により、表示にはログインが必要と設定されています"
+lockdown: "ロックダウン"
+pleaseSelectAccount: "アカウントを選択してください"
 abuseReportCategory: "通報の種類"
 selectCategory: "カテゴリを選択"
 reportComplete: "通報完了"
@@ -2230,8 +2257,11 @@ _auth:
   permissionAsk: "このアプリは次の権限を要求しています"
   pleaseGoBack: "アプリケーションに戻ってやっていってください"
   callback: "アプリケーションに戻っています"
+  accepted: "アクセスを許可しました"
   denied: "アクセスを拒否しました"
+  scopeUser: "以下のユーザーとして操作しています"
   pleaseLogin: "アプリケーションにアクセス許可を与えるには、ログインが必要です。"
+  byClickingYouWillBeRedirectedToThisUrl: "アクセスを許可すると、自動で以下のURLに遷移します"
 
 _antennaSources:
   all: "全てのノート"
diff --git a/locales/ko-KR.yml b/locales/ko-KR.yml
index 097c71a12..e65ddaea2 100644
--- a/locales/ko-KR.yml
+++ b/locales/ko-KR.yml
@@ -1262,6 +1262,37 @@ useTotp: "일회용 비밀번호 사용"
 useBackupCode: "백업 코드 사용"
 launchApp: "앱 실행"
 useNativeUIForVideoAudioPlayer: "브라우저 UI에서 미디어 재생"
+keepOriginalFilename: "원본 파일 이름을 유지"
+keepOriginalFilenameDescription: "이 설정을 끄면 업로드를 할 때 파일 이름이 자동으로 무작위 문자열로 바뀝니다."
+noDescription: "설명문이 없습니다"
+alwaysConfirmFollow: "팔로우일 때 항상 확인하기"
+inquiry: "문의하기"
+tryAgain: "다시 시도해 주세요."
+confirmWhenRevealingSensitiveMedia: "민감한 미디어를 열 때 두 번 확인"
+sensitiveMediaRevealConfirm: "민감한 미디어입니다. 표시할까요?"
+createdLists: "만든 리스트"
+createdAntennas: "만든 안테나"
+fromX: "{x}부터"
+genEmbedCode: "임베디드 코드 만들기"
+noteOfThisUser: "이 유저의 노트 목록"
+clipNoteLimitExceeded: "더 이상 이 클립에 노트를 추가 할 수 없습니다."
+performance: "퍼포먼스"
+modified: "변경 있음"
+discard: "파기"
+thereAreNChanges: "{n}건 변경이 있습니다."
+signinWithPasskey: "패스키로 로그인"
+unknownWebAuthnKey: "등록되지 않은 패스키입니다."
+passkeyVerificationFailed: "패스키 검증을 실패했습니다."
+passkeyVerificationSucceededButPasswordlessLoginDisabled: "패스키를 검증했으나, 비밀번호 없이 로그인하기가 꺼져 있습니다."
+messageToFollower: "팔로워에 보낼 메시지"
+target: "대상"
+testCaptchaWarning: "CAPTCHA를 테스트하기 위한 기능입니다. <strong>실제 환경에서는 사용하지 마세요.</strong>"
+prohibitedWordsForNameOfUser: "금지 단어 (사용자 이름)"
+prohibitedWordsForNameOfUserDescription: "이 목록에 포함되는 키워드가 사용자 이름에 있는 경우, 일반 사용자는 이름을 바꿀 수 없습니다. 모더레이터 권한을 가진 사용자는 제한 대상에서 제외됩니다."
+yourNameContainsProhibitedWords: "바꾸려는 이름에 금지된 키워드가 포함되어 있습니다."
+yourNameContainsProhibitedWordsDescription: "이름에 금지된 키워드가 있습니다. 이름을 사용해야 하는 경우, 서버 관리자에 문의하세요."
+lockdown: "잠금"
+pleaseSelectAccount: "계정을 선택해 주세요"
 here: "여기"
 mutualLink: "서로링크"
 saveThisFile: "이 파일을 드라이브에 저장"
@@ -2166,8 +2197,11 @@ _auth:
   permissionAsk: "이 앱은 다음의 권한을 요청합니다"
   pleaseGoBack: "앱으로 돌아가서 시도해 주세요"
   callback: "앱으로 돌아갑니다"
+  accepted: "접근이 허가되었습니다"
   denied: "접근이 거부되었습니다"
+  scopeUser: "다음 사용자로서 작업 중"
   pleaseLogin: "어플리케이션의 접근을 허가하려면 로그인하십시오."
+  byClickingYouWillBeRedirectedToThisUrl: "접근을 허가하면 자동으로 다음 URL로 이동합니다"
 _antennaSources:
   all: "모든 노트"
   homeTimeline: "팔로우중인 유저의 노트"
diff --git a/packages/frontend/src/_boot_.ts b/packages/frontend/src/_boot_.ts
index 875353f8a..b11e42cc3 100644
--- a/packages/frontend/src/_boot_.ts
+++ b/packages/frontend/src/_boot_.ts
@@ -10,7 +10,7 @@ import '@/style.scss';
 import { mainBoot } from '@/boot/main-boot.js';
 import { subBoot } from '@/boot/sub-boot.js';
 
-const subBootPaths = ['/share', '/auth', '/miauth', '/signup-complete'];
+const subBootPaths = ['/share', '/auth', '/miauth', '/oauth', '/sso', '/signup-complete'];
 
 if (subBootPaths.some(i => location.pathname === i || location.pathname.startsWith(i + '/'))) {
 	subBoot();
diff --git a/packages/frontend/src/account.ts b/packages/frontend/src/account.ts
index 3ac9da773..c11e6e912 100644
--- a/packages/frontend/src/account.ts
+++ b/packages/frontend/src/account.ts
@@ -232,24 +232,6 @@ export async function openAccountMenu(opts: {
 }, ev: MouseEvent) {
 	if (!$i) return;
 
-	function showSigninDialog() {
-		popup(defineAsyncComponent(() => import('@/components/MkSigninDialog.vue')), {}, {
-			done: res => {
-				addAccount(res.id, res.i);
-				success();
-			},
-		}, 'closed');
-	}
-
-	function createAccount() {
-		popup(defineAsyncComponent(() => import('@/components/MkSignupDialog.vue')), {}, {
-			done: res => {
-				addAccount(res.id, res.i);
-				switchAccountWithToken(res.i);
-			},
-		}, 'closed');
-	}
-
 	async function switchAccount(account: Misskey.entities.UserDetailed) {
 		const storedAccounts = await getAccounts();
 		const found = storedAccounts.find(x => x.id === account.id);
@@ -306,10 +288,22 @@ export async function openAccountMenu(opts: {
 			text: i18n.ts.addAccount,
 			children: [{
 				text: i18n.ts.existingAccount,
-				action: () => { showSigninDialog(); },
+				action: () => {
+					getAccountWithSigninDialog().then(res => {
+						if (res != null) {
+							success();
+						}
+					});
+				},
 			}, {
 				text: i18n.ts.createAccount,
-				action: () => { createAccount(); },
+				action: () => {
+					getAccountWithSignupDialog().then(res => {
+						if (res != null) {
+							switchAccountWithToken(res.token);
+						}
+					});
+				},
 			}],
 		}, {
 			type: 'link' as const,
@@ -326,6 +320,40 @@ export async function openAccountMenu(opts: {
 	}
 }
 
+export function getAccountWithSigninDialog(): Promise<{ id: string, token: string } | null> {
+	return new Promise((resolve) => {
+		const { dispose } = popup(defineAsyncComponent(() => import('@/components/MkSigninDialog.vue')), {}, {
+			done: async (res: Misskey.entities.SigninFlowResponse & { finished: true }) => {
+				await addAccount(res.id, res.i);
+				resolve({ id: res.id, token: res.i });
+			},
+			cancelled: () => {
+				resolve(null);
+			},
+			closed: () => {
+				dispose();
+			},
+		});
+	});
+}
+
+export function getAccountWithSignupDialog(): Promise<{ id: string, token: string } | null> {
+	return new Promise((resolve) => {
+		const { dispose } = popup(defineAsyncComponent(() => import('@/components/MkSignupDialog.vue')), {}, {
+			done: async (res: Misskey.entities.SignupResponse) => {
+				await addAccount(res.id, res.token);
+				resolve({ id: res.id, token: res.token });
+			},
+			cancelled: () => {
+				resolve(null);
+			},
+			closed: () => {
+				dispose();
+			},
+		});
+	});
+}
+
 if (_DEV_) {
 	(window as any).$i = $i;
 }
diff --git a/packages/frontend/src/components/MkAuthConfirm.stories.impl.ts b/packages/frontend/src/components/MkAuthConfirm.stories.impl.ts
new file mode 100644
index 000000000..0adc44e20
--- /dev/null
+++ b/packages/frontend/src/components/MkAuthConfirm.stories.impl.ts
@@ -0,0 +1,7 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import MkAuthConfirm from './MkAuthConfirm.vue';
+void MkAuthConfirm;
diff --git a/packages/frontend/src/components/MkAuthConfirm.vue b/packages/frontend/src/components/MkAuthConfirm.vue
new file mode 100644
index 000000000..a6e9005f7
--- /dev/null
+++ b/packages/frontend/src/components/MkAuthConfirm.vue
@@ -0,0 +1,450 @@
+<!--
+SPDX-FileCopyrightText: syuilo and misskey-project
+SPDX-License-Identifier: AGPL-3.0-only
+-->
+
+<template>
+<div :class="$style.wrapper">
+	<Transition
+		mode="out-in"
+		:enterActiveClass="$style.transition_enterActive"
+		:leaveActiveClass="$style.transition_leaveActive"
+		:enterFromClass="$style.transition_enterFrom"
+		:leaveToClass="$style.transition_leaveTo"
+
+		:inert="_waiting"
+	>
+		<div v-if="phase === 'accountSelect'" key="accountSelect" :class="$style.root" class="_gaps">
+			<div :class="$style.header" class="_gaps_s">
+				<div :class="$style.iconFallback">
+					<i class="ti ti-user"></i>
+				</div>
+				<div :class="$style.headerText">{{ i18n.ts.pleaseSelectAccount }}</div>
+			</div>
+			<div :class="$style.accountSelectorRoot">
+				<div :class="$style.accountSelectorLabel">{{ i18n.ts.selectAccount }}</div>
+				<div :class="$style.accountSelectorList">
+					<template v-for="[id, user] in users">
+						<input :id="'account-' + id" v-model="selectedUser" type="radio" name="accountSelector" :value="id" :class="$style.accountSelectorRadio"/>
+						<label :for="'account-' + id" :class="$style.accountSelectorItem">
+							<MkAvatar :user="user" :class="$style.accountSelectorAvatar"/>
+							<div :class="$style.accountSelectorBody">
+								<MkUserName :user="user" :class="$style.accountSelectorName"/>
+								<MkAcct :user="user" :class="$style.accountSelectorAcct"/>
+							</div>
+						</label>
+					</template>
+					<button class="_button" :class="[$style.accountSelectorItem, $style.accountSelectorAddAccountRoot]" @click="clickAddAccount">
+						<div :class="[$style.accountSelectorAvatar, $style.accountSelectorAddAccountAvatar]">
+							<i class="ti ti-user-plus"></i>
+						</div>
+						<div :class="[$style.accountSelectorBody, $style.accountSelectorName]">{{ i18n.ts.addAccount }}</div>
+					</button>
+				</div>
+			</div>
+			<div class="_buttonsCenter">
+				<MkButton rounded gradate :disabled="selectedUser === null" @click="clickChooseAccount">{{ i18n.ts.continue }} <i class="ti ti-arrow-right"></i></MkButton>
+			</div>
+		</div>
+		<div v-else-if="phase === 'consent'" key="consent" :class="$style.root" class="_gaps">
+			<div :class="$style.header" class="_gaps_s">
+				<img v-if="icon" :class="$style.icon" :src="getProxiedImageUrl(icon, 'preview')"/>
+				<div v-else :class="$style.iconFallback">
+					<i class="ti ti-apps"></i>
+				</div>
+				<div :class="$style.headerText">{{ name ? i18n.tsx._auth.shareAccess({ name }) : i18n.ts._auth.shareAccessAsk }}</div>
+			</div>
+			<div v-if="permissions && permissions.length > 0" class="_gaps_s" :class="$style.permissionRoot">
+				<div>{{ name ? i18n.tsx._auth.permission({ name }) : i18n.ts._auth.permissionAsk }}</div>
+				<div :class="$style.permissionListWrapper">
+					<ul :class="$style.permissionList">
+						<li v-for="p in permissions" :key="p">{{ i18n.ts._permissions[p] }}</li>
+					</ul>
+				</div>
+			</div>
+			<slot name="consentAdditionalInfo"></slot>
+			<div :class="$style.accountSelectorRoot">
+				<div :class="$style.accountSelectorLabel">
+					{{ i18n.ts._auth.scopeUser }} <button class="_textButton" @click="clickBackToAccountSelect">{{ i18n.ts.switchAccount }}</button>
+				</div>
+				<div :class="$style.accountSelectorList">
+					<div :class="[$style.accountSelectorItem, $style.static]">
+						<MkAvatar :user="users.get(selectedUser!)!" :class="$style.accountSelectorAvatar"/>
+						<div :class="$style.accountSelectorBody">
+							<MkUserName :user="users.get(selectedUser!)!" :class="$style.accountSelectorName"/>
+							<MkAcct :user="users.get(selectedUser!)!" :class="$style.accountSelectorAcct"/>
+						</div>
+					</div>
+				</div>
+			</div>
+			<div class="_buttonsCenter">
+				<MkButton rounded @click="clickCancel">{{ i18n.ts.reject }}</MkButton>
+				<MkButton rounded gradate @click="clickAccept">{{ i18n.ts.accept }}</MkButton>
+			</div>
+		</div>
+		<div v-else-if="phase === 'success'" key="success" :class="$style.root" class="_gaps_s">
+			<div :class="$style.header" class="_gaps_s">
+				<div :class="$style.iconFallback">
+					<i class="ti ti-check"></i>
+				</div>
+				<div :class="$style.headerText">{{ i18n.ts._auth.accepted }}</div>
+				<div :class="$style.headerTextSub">{{ i18n.ts._auth.pleaseGoBack }}</div>
+			</div>
+		</div>
+		<div v-else-if="phase === 'denied'" key="denied" :class="$style.root" class="_gaps_s">
+			<div :class="$style.header" class="_gaps_s">
+				<div :class="$style.iconFallback">
+					<i class="ti ti-x"></i>
+				</div>
+				<div :class="$style.headerText">{{ i18n.ts._auth.denied }}</div>
+			</div>
+		</div>
+		<div v-else-if="phase === 'failed'" key="failed" :class="$style.root" class="_gaps_s">
+			<div :class="$style.header" class="_gaps_s">
+				<div :class="$style.iconFallback">
+					<i class="ti ti-x"></i>
+				</div>
+				<div :class="$style.headerText">{{ i18n.ts.somethingHappened }}</div>
+			</div>
+		</div>
+	</Transition>
+	<div v-if="_waiting" :class="$style.waitingRoot">
+		<MkLoading/>
+	</div>
+</div>
+</template>
+
+<script setup lang="ts">
+import { ref, computed } from 'vue';
+import * as Misskey from 'misskey-js';
+
+import MkButton from '@/components/MkButton.vue';
+
+import { $i, getAccounts, getAccountWithSigninDialog, getAccountWithSignupDialog } from '@/account.js';
+import { i18n } from '@/i18n.js';
+import * as os from '@/os.js';
+import { getProxiedImageUrl } from '@/scripts/media-proxy.js';
+import { misskeyApi } from '@/scripts/misskey-api.js';
+
+const props = defineProps<{
+	name?: string;
+	icon?: string;
+	permissions?: (typeof Misskey.permissions[number])[];
+	manualWaiting?: boolean;
+	waitOnDeny?: boolean;
+}>();
+
+const emit = defineEmits<{
+	(ev: 'accept', token: string): void;
+	(ev: 'deny', token: string): void;
+}>();
+
+const waiting = ref(true);
+const _waiting = computed(() => waiting.value || props.manualWaiting);
+const phase = ref<'accountSelect' | 'consent' | 'success' | 'denied' | 'failed'>('accountSelect');
+
+const selectedUser = ref<string | null>(null);
+
+const users = ref(new Map<string, Misskey.entities.UserDetailed & { token: string; }>());
+
+async function init() {
+	waiting.value = true;
+
+	users.value.clear();
+
+	if ($i) {
+		users.value.set($i.id, $i);
+	}
+
+	const accounts = await getAccounts();
+
+	const accountIdsToFetch = accounts.map(a => a.id).filter(id => !users.value.has(id));
+
+	if (accountIdsToFetch.length > 0) {
+		const usersRes = await misskeyApi('users/show', {
+			userIds: accountIdsToFetch,
+		});
+
+		for (const user of usersRes) {
+			if (users.value.has(user.id)) continue;
+
+			users.value.set(user.id, {
+				...user,
+				token: accounts.find(a => a.id === user.id)!.token,
+			});
+		}
+	}
+
+	waiting.value = false;
+}
+
+init();
+
+function clickAddAccount(ev: MouseEvent) {
+	selectedUser.value = null;
+
+	os.popupMenu([{
+		text: i18n.ts.existingAccount,
+		action: () => {
+			getAccountWithSigninDialog().then(async (res) => {
+				if (res != null) {
+					os.success();
+					await init();
+					if (users.value.has(res.id)) {
+						selectedUser.value = res.id;
+					}
+				}
+			});
+		},
+	}, {
+		text: i18n.ts.createAccount,
+		action: () => {
+			getAccountWithSignupDialog().then(async (res) => {
+				if (res != null) {
+					os.success();
+					await init();
+					if (users.value.has(res.id)) {
+						selectedUser.value = res.id;
+					}
+				}
+			});
+		},
+	}], ev.currentTarget ?? ev.target);
+}
+
+function clickChooseAccount() {
+	if (selectedUser.value === null) return;
+
+	phase.value = 'consent';
+}
+
+function clickBackToAccountSelect() {
+	selectedUser.value = null;
+	phase.value = 'accountSelect';
+}
+
+function clickCancel() {
+	if (selectedUser.value === null) return;
+
+	const user = users.value.get(selectedUser.value)!;
+
+	const token = user.token;
+
+	if (props.waitOnDeny) {
+		waiting.value = true;
+	}
+	emit('deny', token);
+}
+
+async function clickAccept() {
+	if (selectedUser.value === null) return;
+
+	const user = users.value.get(selectedUser.value)!;
+
+	const token = user.token;
+
+	waiting.value = true;
+	emit('accept', token);
+}
+
+function showUI(state: 'success' | 'denied' | 'failed') {
+	phase.value = state;
+	waiting.value = false;
+}
+
+defineExpose({
+	showUI,
+});
+</script>
+
+<style lang="scss" module>
+.transition_enterActive,
+.transition_leaveActive {
+	transition: opacity 0.3s cubic-bezier(0,0,.35,1), transform 0.3s cubic-bezier(0,0,.35,1);
+}
+.transition_enterFrom {
+	opacity: 0;
+	transform: translateX(50px);
+}
+.transition_leaveTo {
+	opacity: 0;
+	transform: translateX(-50px);
+}
+
+.wrapper {
+	overflow-x: hidden;
+	overflow-x: clip;
+
+	position: relative;
+	width: 100%;
+	height: 100%;
+}
+
+.waitingRoot {
+	position: absolute;
+	top: 0;
+	left: 0;
+	width: 100%;
+	height: 100%;
+	background-color: color-mix(in srgb, var(--panel), transparent 50%);
+	display: flex;
+	justify-content: center;
+	align-items: center;
+	z-index: 1;
+	cursor: wait;
+}
+
+.root {
+	position: relative;
+	box-sizing: border-box;
+	width: 100%;
+	padding: 48px 24px;
+}
+
+.header {
+	margin: 0 auto;
+	max-width: 320px;
+}
+
+.icon,
+.iconFallback {
+	display: block;
+	margin: 0 auto;
+	width: 54px;
+	height: 54px;
+}
+
+.icon {
+	border-radius: 50%;
+	border: 1px solid var(--divider);
+	background-color: #fff;
+	object-fit: contain;
+}
+
+.iconFallback {
+	border-radius: 50%;
+	background-color: var(--accentedBg);
+	color: var(--accent);
+	text-align: center;
+	line-height: 54px;
+	font-size: 18px;
+}
+
+.headerText,
+.headerTextSub {
+	text-align: center;
+	word-break: normal;
+	word-break: auto-phrase;
+}
+
+.headerText {
+	font-size: 16px;
+	font-weight: 700;
+}
+
+.permissionRoot {
+	padding: 16px;
+	border-radius: var(--radius);
+	background-color: var(--bg);
+}
+
+.permissionListWrapper {
+	max-height: 350px;
+	overflow-y: auto;
+	padding: 12px;
+	border-radius: var(--radius);
+	background-color: var(--panel);
+}
+
+.permissionList {
+	margin: 0 0 0 1.5em;
+	padding: 0;
+	font-size: 90%;
+}
+
+.accountSelectorLabel {
+	font-size: 0.85em;
+	opacity: 0.7;
+	margin-bottom: 8px;
+}
+
+.accountSelectorList {
+	border-radius: var(--radius);
+	border: 1px solid var(--divider);
+	overflow: hidden;
+	overflow: clip;
+}
+
+.accountSelectorRadio {
+	position: absolute;
+	clip: rect(0, 0, 0, 0);
+	pointer-events: none;
+
+	&:focus-visible + .accountSelectorItem {
+		outline: 2px solid var(--accent);
+		outline-offset: -4px;
+	}
+
+	&:checked:focus-visible + .accountSelectorItem {
+		outline-color: #fff;
+	}
+
+	&:checked + .accountSelectorItem {
+		background: color-mix(in srgb, var(--accent), transparent 50%);
+		color: #fff;
+	}
+}
+
+.accountSelectorItem {
+	display: flex;
+	align-items: center;
+	padding: 8px;
+	font-size: 14px;
+	-webkit-tap-highlight-color: transparent;
+	cursor: pointer;
+
+	&:hover {
+		background: var(--buttonHoverBg);
+	}
+
+	&.static {
+		cursor: unset;
+
+		&:hover {
+			background: none;
+		}
+	}
+}
+
+.accountSelectorAddAccountRoot {
+	width: 100%;
+}
+
+.accountSelectorBody {
+	padding: 0 8px;
+	min-width: 0;
+}
+
+.accountSelectorAvatar {
+	width: 45px;
+	height: 45px;
+}
+
+.accountSelectorAddAccountAvatar {
+	background-color: var(--accentedBg);
+	color: var(--accent);
+	font-size: 16px;
+	line-height: 45px;
+	text-align: center;
+	border-radius: 50%;
+}
+
+.accountSelectorName {
+	display: block;
+	font-weight: bold;
+}
+
+.accountSelectorAcct {
+	opacity: 0.5;
+}
+</style>
diff --git a/packages/frontend/src/components/MkModalWindow.vue b/packages/frontend/src/components/MkModalWindow.vue
index 935461be9..233c52e6e 100644
--- a/packages/frontend/src/components/MkModalWindow.vue
+++ b/packages/frontend/src/components/MkModalWindow.vue
@@ -26,12 +26,12 @@ import { onMounted, onUnmounted, shallowRef, ref } from 'vue';
 import MkModal from './MkModal.vue';
 
 const props = withDefaults(defineProps<{
-	withOkButton: boolean;
-	withCloseButton: boolean;
-	okButtonDisabled: boolean;
-	escKeyDisabled: boolean;
-	width: number;
-	height: number;
+	withOkButton?: boolean;
+	withCloseButton?: boolean;
+	okButtonDisabled?: boolean;
+	escKeyDisabled?: boolean;
+	width?: number;
+	height?: number;
 }>(), {
 	withOkButton: false,
 	withCloseButton: true,
diff --git a/packages/frontend/src/components/MkSignupDialog.vue b/packages/frontend/src/components/MkSignupDialog.vue
index 97310d32a..4f75a36fb 100644
--- a/packages/frontend/src/components/MkSignupDialog.vue
+++ b/packages/frontend/src/components/MkSignupDialog.vue
@@ -8,7 +8,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 	ref="dialog"
 	:width="500"
 	:height="600"
-	@close="dialog?.close()"
+	@close="onClose"
 	@closed="$emit('closed')"
 >
 	<template #header>{{ i18n.ts.signup }}</template>
@@ -22,7 +22,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 			:leaveToClass="$style.transition_x_leaveTo"
 		>
 			<template v-if="!isAcceptedServerRule">
-				<XServerRules @done="isAcceptedServerRule = true" @cancel="dialog?.close()"/>
+				<XServerRules @done="isAcceptedServerRule = true" @cancel="onClose"/>
 			</template>
 			<template v-else>
 				<XSignup :autoSet="autoSet" @signup="onSignup" @signupEmailPending="onSignupEmailPending"/>
@@ -47,7 +47,8 @@ const props = withDefaults(defineProps<{
 });
 
 const emit = defineEmits<{
-	(ev: 'done', res: Misskey.entities.SigninResponse): void;
+	(ev: 'done', res: Misskey.entities.SignupResponse): void;
+	(ev: 'cancelled'): void;
 	(ev: 'closed'): void;
 }>();
 
@@ -55,7 +56,12 @@ const dialog = shallowRef<InstanceType<typeof MkModalWindow>>();
 
 const isAcceptedServerRule = ref(false);
 
-function onSignup(res: Misskey.entities.SigninResponse) {
+function onClose() {
+	emit('cancelled');
+	dialog.value?.close();
+}
+
+function onSignup(res: Misskey.entities.SignupResponse) {
 	emit('done', res);
 	dialog.value?.close();
 }
diff --git a/packages/frontend/src/pages/miauth.vue b/packages/frontend/src/pages/miauth.vue
index ffaf739ed..e65c8a11b 100644
--- a/packages/frontend/src/pages/miauth.vue
+++ b/packages/frontend/src/pages/miauth.vue
@@ -4,95 +4,79 @@ SPDX-License-Identifier: AGPL-3.0-only
 -->
 
 <template>
-<MkStickyContainer>
-	<template #header><MkPageHeader :actions="headerActions" :tabs="headerTabs"/></template>
-	<MkSpacer :contentMax="800">
-		<div v-if="$i">
-			<div v-if="state == 'waiting'">
-				<MkLoading/>
-			</div>
-			<div v-if="state == 'denied'">
-				<p>{{ i18n.ts._auth.denied }}</p>
-			</div>
-			<div v-else-if="state == 'accepted'" class="accepted">
-				<p v-if="callback">{{ i18n.ts._auth.callback }}<MkEllipsis/></p>
-				<p v-else>{{ i18n.ts._auth.pleaseGoBack }}</p>
-			</div>
-			<div v-else>
-				<div v-if="_permissions.length > 0">
-					<p v-if="name">{{ i18n.tsx._auth.permission({ name }) }}</p>
-					<p v-else>{{ i18n.ts._auth.permissionAsk }}</p>
-					<ul>
-						<li v-for="p in _permissions" :key="p">{{ i18n.ts._permissions[p] }}</li>
-					</ul>
-				</div>
-				<div v-if="name">{{ i18n.tsx._auth.shareAccess({ name }) }}</div>
-				<div v-else>{{ i18n.ts._auth.shareAccessAsk }}</div>
-				<div :class="$style.buttons">
-					<MkButton inline @click="deny">{{ i18n.ts.cancel }}</MkButton>
-					<MkButton inline primary @click="accept">{{ i18n.ts.accept }}</MkButton>
-				</div>
-			</div>
+<div>
+	<MkAnimBg style="position: fixed; top: 0;"/>
+	<div :class="$style.formContainer">
+		<div :class="$style.form">
+			<MkAuthConfirm
+				ref="authRoot"
+				:name="name"
+				:icon="icon || undefined"
+				:permissions="_permissions"
+				@accept="onAccept"
+				@deny="onDeny"
+			>
+				<template #consentAdditionalInfo>
+					<div v-if="callback != null" :class="$style.redirectRoot">
+						<div>{{ i18n.ts._auth.byClickingYouWillBeRedirectedToThisUrl }}</div>
+						<div class="_monospace" :class="$style.redirectUrl">{{ callback }}</div>
+					</div>
+				</template>
+			</MkAuthConfirm>
 		</div>
-		<div v-else>
-			<p :class="$style.loginMessage">{{ i18n.ts._auth.pleaseLogin }}</p>
-			<MkSignin @login="onLogin"/>
-		</div>
-	</MkSpacer>
-</MkStickyContainer>
+	</div>
+</div>
 </template>
 
 <script lang="ts" setup>
-import { ref, computed } from 'vue';
-import MkSignin from '@/components/MkSignin.vue';
-import MkButton from '@/components/MkButton.vue';
-import { misskeyApi } from '@/scripts/misskey-api.js';
-import { $i, login } from '@/account.js';
+import { computed, useTemplateRef } from 'vue';
+import * as Misskey from 'misskey-js';
+
+import MkAnimBg from '@/components/MkAnimBg.vue';
+import MkAuthConfirm from '@/components/MkAuthConfirm.vue';
+
 import { i18n } from '@/i18n.js';
+import { misskeyApi } from '@/scripts/misskey-api.js';
 import { definePageMetadata } from '@/scripts/page-metadata.js';
 
 const props = defineProps<{
 	session: string;
 	callback?: string;
-	name: string;
-	icon: string;
-	permission: string; // コンマ区切り
+	name?: string;
+	icon?: string;
+	permission?: string; // コンマ区切り
 }>();
 
-const _permissions = props.permission ? props.permission.split(',') : [];
+const _permissions = computed(() => {
+	return (props.permission ? props.permission.split(',').filter((p): p is typeof Misskey.permissions[number] => (Misskey.permissions as readonly string[]).includes(p)) : []);
+});
 
-const state = ref<string | null>(null);
+const authRoot = useTemplateRef('authRoot');
 
-async function accept(): Promise<void> {
-	state.value = 'waiting';
+async function onAccept(token: string) {
 	await misskeyApi('miauth/gen-token', {
 		session: props.session,
 		name: props.name,
 		iconUrl: props.icon,
-		permission: _permissions,
+		permission: _permissions.value,
+	}, token).catch(() => {
+		authRoot.value?.showUI('failed');
 	});
 
-	state.value = 'accepted';
-	if (props.callback) {
+	if (props.callback && props.callback !== '') {
 		const cbUrl = new URL(props.callback);
 		if (['javascript:', 'file:', 'data:', 'mailto:', 'tel:'].includes(cbUrl.protocol)) throw new Error('invalid url');
 		cbUrl.searchParams.set('session', props.session);
-		location.href = cbUrl.href;
+		location.href = cbUrl.toString();
+	} else {
+		authRoot.value?.showUI('success');
 	}
 }
 
-function deny(): void {
-	state.value = 'denied';
+function onDeny() {
+	authRoot.value?.showUI('denied');
 }
 
-function onLogin(res): void {
-	login(res.i);
-}
-
-const headerActions = computed(() => []);
-
-const headerTabs = computed(() => []);
-
 definePageMetadata(() => ({
 	title: 'MiAuth',
 	icon: 'ti ti-apps',
@@ -100,15 +84,38 @@ definePageMetadata(() => ({
 </script>
 
 <style lang="scss" module>
-.buttons {
-	margin-top: 16px;
-	display: flex;
-	gap: 8px;
-	flex-wrap: wrap;
+.formContainer {
+	min-height: 100svh;
+	padding: 32px 32px calc(env(safe-area-inset-bottom, 0px) + 32px) 32px;
+	box-sizing: border-box;
+	display: grid;
+	place-content: center;
 }
 
-.loginMessage {
-	text-align: center;
-	margin: 8px 0 24px;
+.form {
+	position: relative;
+	z-index: 10;
+	border-radius: var(--radius);
+	background-color: var(--panel);
+	box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
+	overflow: clip;
+	max-width: 500px;
+	width: calc(100vw - 64px);
+	height: min(65svh, calc(100svh - calc(env(safe-area-inset-bottom, 0px) + 64px)));
+	overflow-y: scroll;
+}
+
+.redirectRoot {
+	padding: 16px;
+	border-radius: var(--radius);
+	background-color: var(--bg);
+}
+
+.redirectUrl {
+	font-size: 90%;
+	padding: 12px;
+	border-radius: var(--radius);
+	background-color: var(--panel);
+	overflow-x: scroll;
 }
 </style>
diff --git a/packages/frontend/src/pages/oauth.vue b/packages/frontend/src/pages/oauth.vue
index 68466dced..b3202e891 100644
--- a/packages/frontend/src/pages/oauth.vue
+++ b/packages/frontend/src/pages/oauth.vue
@@ -4,40 +4,28 @@ SPDX-License-Identifier: AGPL-3.0-only
 -->
 
 <template>
-<MkStickyContainer>
-	<template #header><MkPageHeader/></template>
-	<MkSpacer :contentMax="800">
-		<div v-if="$i">
-			<div v-if="permissions.length > 0">
-				<p v-if="name">{{ i18n.tsx._auth.permission({ name }) }}</p>
-				<p v-else>{{ i18n.ts._auth.permissionAsk }}</p>
-				<ul>
-					<li v-for="p in permissions" :key="p">{{ i18n.ts._permissions[p] }}</li>
-				</ul>
-			</div>
-			<div v-if="name">{{ i18n.tsx._auth.shareAccess({ name }) }}</div>
-			<div v-else>{{ i18n.ts._auth.shareAccessAsk }}</div>
-			<form :class="$style.buttons" action="/oauth/decision" accept-charset="utf-8" method="post">
-				<input name="login_token" class="mk-input-token-hidden" type="hidden" :value="$i.token"/>
-				<input name="transaction_id" class="mk-input-tr-id-hidden" type="hidden" :value="transactionIdMeta?.content"/>
-				<MkButton inline name="cancel" value="cancel">{{ i18n.ts.cancel }}</MkButton>
-				<MkButton inline primary>{{ i18n.ts.accept }}</MkButton>
-			</form>
+<div>
+	<MkAnimBg style="position: fixed; top: 0;"/>
+	<div :class="$style.formContainer">
+		<div :class="$style.form">
+			<MkAuthConfirm
+				ref="authRoot"
+				:name="name"
+				:permissions="permissions"
+				:waitOnDeny="true"
+				@accept="onAccept"
+				@deny="onDeny"
+			/>
 		</div>
-		<div v-else>
-			<p :class="$style.loginMessage">{{ i18n.ts._auth.pleaseLogin }}</p>
-			<MkSignin @login="onLogin"/>
-		</div>
-	</MkSpacer>
-</MkStickyContainer>
+	</div>
+</div>
 </template>
 
 <script lang="ts" setup>
-import MkSignin from '@/components/MkSignin.vue';
-import MkButton from '@/components/MkButton.vue';
-import { $i, login } from '@/account.js';
-import { i18n } from '@/i18n.js';
+import * as Misskey from 'misskey-js';
+import MkAnimBg from '@/components/MkAnimBg.vue';
 import { definePageMetadata } from '@/scripts/page-metadata.js';
+import MkAuthConfirm from '@/components/MkAuthConfirm.vue';
 
 const transactionIdMeta = document.querySelector<HTMLMetaElement>('meta[name="misskey:oauth:transaction-id"]');
 if (transactionIdMeta) {
@@ -45,10 +33,44 @@ if (transactionIdMeta) {
 }
 
 const name = document.querySelector<HTMLMetaElement>('meta[name="misskey:oauth:client-name"]')?.content;
-const permissions = document.querySelector<HTMLMetaElement>('meta[name="misskey:oauth:scope"]')?.content.split(' ') ?? [];
+const permissions = document.querySelector<HTMLMetaElement>('meta[name="misskey:oauth:scope"]')?.content.split(' ').filter((p): p is typeof Misskey.permissions[number] => (Misskey.permissions as readonly string[]).includes(p)) ?? [];
 
-function onLogin(res): void {
-	login(res.i);
+function doPost(token: string, decision: 'accept' | 'deny') {
+	const form = document.createElement('form');
+	form.action = '/oauth/decision';
+	form.method = 'post';
+	form.acceptCharset = 'utf-8';
+
+	const loginToken = document.createElement('input');
+	loginToken.type = 'hidden';
+	loginToken.name = 'login_token';
+	loginToken.value = token;
+	form.appendChild(loginToken);
+
+	const transactionId = document.createElement('input');
+	transactionId.type = 'hidden';
+	transactionId.name = 'transaction_id';
+	transactionId.value = transactionIdMeta?.content ?? '';
+	form.appendChild(transactionId);
+
+	if (decision === 'deny') {
+		const cancel = document.createElement('input');
+		cancel.type = 'hidden';
+		cancel.name = 'cancel';
+		cancel.value = 'cancel';
+		form.appendChild(cancel);
+	}
+
+	document.body.appendChild(form);
+	form.submit();
+}
+
+function onAccept(token: string) {
+	doPost(token, 'accept');
+}
+
+function onDeny(token: string) {
+	doPost(token, 'deny');
 }
 
 definePageMetadata(() => ({
@@ -58,15 +80,24 @@ definePageMetadata(() => ({
 </script>
 
 <style lang="scss" module>
-.buttons {
-	margin-top: 16px;
-	display: flex;
-	gap: 8px;
-	flex-wrap: wrap;
+.formContainer {
+	min-height: 100svh;
+	padding: 32px 32px calc(env(safe-area-inset-bottom, 0px) + 32px) 32px;
+	box-sizing: border-box;
+	display: grid;
+	place-content: center;
 }
 
-.loginMessage {
-	text-align: center;
-	margin: 8px 0 24px;
+.form {
+	position: relative;
+	z-index: 10;
+	border-radius: var(--radius);
+	background-color: var(--panel);
+	box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
+	overflow: clip;
+	max-width: 500px;
+	width: calc(100vw - 64px);
+	height: min(65svh, calc(100svh - calc(env(safe-area-inset-bottom, 0px) + 64px)));
+	overflow-y: scroll;
 }
 </style>
diff --git a/packages/frontend/src/pages/settings/accounts.vue b/packages/frontend/src/pages/settings/accounts.vue
index 1182346de..6d9337779 100644
--- a/packages/frontend/src/pages/settings/accounts.vue
+++ b/packages/frontend/src/pages/settings/accounts.vue
@@ -19,13 +19,13 @@ SPDX-License-Identifier: AGPL-3.0-only
 </template>
 
 <script lang="ts" setup>
-import { defineAsyncComponent, ref, computed } from 'vue';
+import { ref, computed } from 'vue';
 import type * as Misskey from 'misskey-js';
 import FormSuspense from '@/components/form/suspense.vue';
 import MkButton from '@/components/MkButton.vue';
 import * as os from '@/os.js';
 import { misskeyApi } from '@/scripts/misskey-api.js';
-import { getAccounts, addAccount as addAccounts, removeAccount as _removeAccount, login, $i } from '@/account.js';
+import { getAccounts, removeAccount as _removeAccount, login, $i, getAccountWithSigninDialog, getAccountWithSignupDialog } from '@/account.js';
 import { i18n } from '@/i18n.js';
 import { definePageMetadata } from '@/scripts/page-metadata.js';
 import MkUserCardMini from '@/components/MkUserCardMini.vue';
@@ -74,22 +74,20 @@ async function removeAccount(account) {
 }
 
 function addExistingAccount() {
-	os.popup(defineAsyncComponent(() => import('@/components/MkSigninDialog.vue')), {}, {
-		done: async res => {
-			await addAccounts(res.id, res.i);
+	getAccountWithSigninDialog().then((res) => {
+		if (res != null) {
 			os.success();
 			init();
-		},
-	}, 'closed');
+		}
+	});
 }
 
 function createAccount() {
-	os.popup(defineAsyncComponent(() => import('@/components/MkSignupDialog.vue')), {}, {
-		done: async res => {
-			await addAccounts(res.id, res.i);
-			switchAccountWithToken(res.i);
-		},
-	}, 'closed');
+	getAccountWithSignupDialog().then((res) => {
+		if (res != null) {
+			switchAccountWithToken(res.token);
+		}
+	});
 }
 
 async function switchAccount(account: any) {
diff --git a/packages/frontend/src/pages/sso.vue b/packages/frontend/src/pages/sso.vue
index d113f0712..13e9fc356 100644
--- a/packages/frontend/src/pages/sso.vue
+++ b/packages/frontend/src/pages/sso.vue
@@ -1,100 +1,88 @@
-<!--
-SPDX-FileCopyrightText: syuilo and misskey-project
-SPDX-License-Identifier: AGPL-3.0-only
--->
-
 <template>
-<MkStickyContainer>
-	<template #header><MkPageHeader/></template>
-	<MkSpacer :contentMax="800">
-		<div v-if="$i && !loading">
-			<div v-if="name">{{ i18n.tsx._auth.shareAccess({ name }) }}</div>
-			<div v-else>{{ i18n.ts._auth.shareAccessAsk }}</div>
-			<div :class="$style.buttons">
-				<MkButton @click="onCancel">{{ i18n.ts.cancel }}</MkButton>
-				<MkButton primary @click="onAccept">{{ i18n.ts.accept }}</MkButton>
+	<div>
+		<MkAnimBg style="position: fixed; top: 0;"/>
+		<div :class="$style.formContainer">
+			<div :class="$style.form">
+				<MkAuthConfirm
+					ref="authRoot"
+					:name="name"
+					@accept="onAccept"
+					@deny="onDeny"
+				/>
 			</div>
 		</div>
-		<div v-else-if="$i && loading">
-			<div>{{ i18n.ts._auth.callback }}</div>
-			<MkLoading class="loading"/>
-			<div style="display: none">
-				<form ref="postBindingForm" method="post" :action="actionUrl" autocomplete="off">
-					<input v-for="(value, key) in actionContext" :key="key" :name="key" :value="value" type="hidden"/>
-				</form>
-			</div>
-		</div>
-		<div v-else>
-			<p :class="$style.loginMessage">{{ i18n.ts._auth.pleaseLogin }}</p>
-			<MkSignin @login="onLogin"/>
-		</div>
-	</MkSpacer>
-</MkStickyContainer>
+	</div>
 </template>
 
 <script lang="ts" setup>
-import { ref, nextTick, onMounted } from 'vue';
-import MkSignin from '@/components/MkSignin.vue';
-import MkButton from '@/components/MkButton.vue';
-import { $i, login } from '@/account.js';
-import { i18n } from '@/i18n.js';
-import * as os from '@/os.js';
+import MkAnimBg from '@/components/MkAnimBg.vue';
 import { definePageMetadata } from '@/scripts/page-metadata.js';
+import MkAuthConfirm from '@/components/MkAuthConfirm.vue';
+import { nextTick, onMounted, useTemplateRef } from "vue";
+import { $i } from "@/account.js";
 
 const transactionIdMeta = document.querySelector<HTMLMetaElement>('meta[name="misskey:sso:transaction-id"]');
 if (transactionIdMeta) {
 	transactionIdMeta.remove();
 }
+
 const name = document.querySelector<HTMLMetaElement>('meta[name="misskey:sso:service-name"]')?.content;
 const kind = document.querySelector<HTMLMetaElement>('meta[name="misskey:sso:kind"]')?.content;
 const prompt = document.querySelector<HTMLMetaElement>('meta[name="misskey:sso:prompt"]')?.content;
 
-const loading = ref(false);
-const postBindingForm = ref<HTMLFormElement | null>(null);
-const actionUrl = ref<string | undefined>(undefined);
-const actionContext = ref<Record<string, string> | null>(null);
+const authRoot = useTemplateRef('authRoot');
 
-function onLogin(res): void {
-	login(res.i);
-}
-
-function onCancel(): void {
-	if (history.length > 1) history.back();
-	else location.href = '/';
-}
-
-function onAccept(): void {
-	loading.value = true;
-	os.promiseDialog(authorize());
-}
-
-async function authorize(): Promise<void> {
-	const res = await fetch(`/sso/${kind}/authorize`, {
+async function onAccept(token: string) {
+	const result = await fetch(`/sso/${kind}/authorize`, {
 		method: 'POST',
 		headers: {
 			'Content-Type': 'application/json',
 		},
 		body: JSON.stringify({
 			transaction_id: transactionIdMeta?.content,
-			login_token: $i!.token,
+			login_token: token,
 		}),
+	}).then(res => res.json()).catch(() => {
+		authRoot.value?.showUI('failed');
 	});
-	const json = await res.json();
-	if (json.binding === 'post') {
-		actionUrl.value = json.action;
-		actionContext.value = json.context;
+
+	if (!result) return;
+	authRoot.value?.showUI('success');
+
+	if (result.binding === 'post') {
+		const form = document.createElement('form');
+		form.style.display = 'none';
+		form.action = result.action;
+		form.method = 'post';
+		form.acceptCharset = 'utf-8';
+
+		for (const [name, value] of Object.entries(result.context)) {
+			const input = document.createElement('input');
+			input.type = 'hidden';
+			input.name = name;
+			input.value = value as string;
+			form.appendChild(input);
+		}
+
 		nextTick(() => {
-			postBindingForm.value?.submit();
+			document.body.appendChild(form);
+			form.submit();
 		});
 	} else {
-		location.href = json.action;
+		location.href = result.action;
 	}
 }
 
+function onDeny(token: string) {
+	authRoot.value?.showUI('denied');
+}
+
 onMounted(() => {
-	if ($i && prompt === 'none') {
-		onAccept();
-	}
+	nextTick(() => {
+		if ($i && prompt === 'none') {
+			onAccept($i.token);
+		}
+	});
 });
 
 definePageMetadata(() => ({
@@ -104,15 +92,24 @@ definePageMetadata(() => ({
 </script>
 
 <style lang="scss" module>
-.buttons {
-	margin-top: 16px;
-	display: flex;
-	gap: 8px;
-	flex-wrap: wrap;
+.formContainer {
+	min-height: 100svh;
+	padding: 32px 32px calc(env(safe-area-inset-bottom, 0px) + 32px) 32px;
+	box-sizing: border-box;
+	display: grid;
+	place-content: center;
 }
 
-.loginMessage {
-	text-align: center;
-	margin: 8px 0 24px;
+.form {
+	position: relative;
+	z-index: 10;
+	border-radius: var(--radius);
+	background-color: var(--panel);
+	box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
+	overflow: clip;
+	max-width: 500px;
+	width: calc(100vw - 64px);
+	height: min(65svh, calc(100svh - calc(env(safe-area-inset-bottom, 0px) + 64px)));
+	overflow-y: scroll;
 }
 </style>