diff --git a/locales/en-US.yml b/locales/en-US.yml
index 5465a3aad..adba0ee6a 100644
--- a/locales/en-US.yml
+++ b/locales/en-US.yml
@@ -765,6 +765,7 @@ lockedAccountInfo: "Unless you set your note visiblity to \"Followers only\", yo
 alwaysMarkSensitive: "Mark as sensitive by default"
 loadRawImages: "Load original images instead of showing thumbnails"
 disableCatSpeak: "Disable cat speak"
+markIncomingMediaInCwedPostAsSensitive: "Mark incoming media in cwed posts as sensitive"
 disableShowingAnimatedImages: "Don't play animated images"
 highlightSensitiveMedia: "Highlight sensitive media"
 verificationEmailSent: "A verification email has been sent. Please follow the included link to complete verification."
diff --git a/locales/index.d.ts b/locales/index.d.ts
index 2d066a1d7..5585b0986 100644
--- a/locales/index.d.ts
+++ b/locales/index.d.ts
@@ -3076,6 +3076,10 @@ export interface Locale extends ILocale {
      * 猫の話し方を無効にする
      */
     "disableCatSpeak": string;
+    /**
+     * cwed投稿の受信メディアを機密扱いとしてマークする
+     */
+    "markIncomingMediaInCwedPostAsSensitive": string;
     /**
      * アニメーション画像を再生しない
      */
diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index 3df48f305..abbe0296a 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -765,6 +765,7 @@ lockedAccountInfo: "フォローを承認制にしても、ノートの公開範
 alwaysMarkSensitive: "デフォルトでメディアをセンシティブ設定にする"
 loadRawImages: "添付画像のサムネイルをオリジナル画質にする"
 disableCatSpeak: "猫の話し方を無効にする"
+markIncomingMediaInCwedPostAsSensitive: "cwed投稿の受信メディアを機密扱いとしてマークする"
 disableShowingAnimatedImages: "アニメーション画像を再生しない"
 highlightSensitiveMedia: "メディアがセンシティブであることを分かりやすく表示"
 verificationEmailSent: "確認のメールを送信しました。メールに記載されたリンクにアクセスして、設定を完了してください。"
diff --git a/packages/frontend/src/components/MkMediaList.vue b/packages/frontend/src/components/MkMediaList.vue
index 9c836b586..4508abda8 100644
--- a/packages/frontend/src/components/MkMediaList.vue
+++ b/packages/frontend/src/components/MkMediaList.vue
@@ -39,11 +39,13 @@ import XVideo from '@/components/MkMediaVideo.vue';
 import * as os from '@/os.js';
 import { FILE_TYPE_BROWSERSAFE } from '@/const.js';
 import { defaultStore } from '@/store.js';
+import {$i} from "@/account";
 
 const props = defineProps<{
 	mediaList: Misskey.entities.DriveFile[];
 	user?: Misskey.entities.UserLite;
 	raw?: boolean;
+	isNoteSensitive?: boolean;
 }>();
 
 const gallery = shallowRef<HTMLDivElement>();
@@ -90,6 +92,11 @@ async function calcAspectRatio() {
 }
 
 onMounted(() => {
+	if (($i ? defaultStore.state.markIncomingMediaInCwedPostAsSensitive : true))
+		props.mediaList.forEach(media => {
+			media.isSensitive = props.isNoteSensitive
+		})
+
 	calcAspectRatio();
 
 	lightbox = new PhotoSwipeLightbox({
diff --git a/packages/frontend/src/components/MkNote.vue b/packages/frontend/src/components/MkNote.vue
index 6a67a98a1..641043943 100644
--- a/packages/frontend/src/components/MkNote.vue
+++ b/packages/frontend/src/components/MkNote.vue
@@ -79,7 +79,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 						</div>
 					</div>
 					<div v-if="appearNote.files && appearNote.files.length > 0">
-						<MkMediaList :mediaList="appearNote.files" :user="appearNote.user"/>
+						<MkMediaList :mediaList="appearNote.files" :user="appearNote.user" :is-note-sensitive="note.cw"/>
 					</div>
 					<MkPoll v-if="appearNote.poll" :noteId="appearNote.id" :poll="appearNote.poll" :class="$style.poll"/>
 					<div v-if="isEnabledUrlPreview">
diff --git a/packages/frontend/src/components/MkNoteDetailed.vue b/packages/frontend/src/components/MkNoteDetailed.vue
index 1656c7cba..b7fe11d99 100644
--- a/packages/frontend/src/components/MkNoteDetailed.vue
+++ b/packages/frontend/src/components/MkNoteDetailed.vue
@@ -92,7 +92,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 					</div>
 				</div>
 				<div v-if="appearNote.files && appearNote.files.length > 0">
-					<MkMediaList :mediaList="appearNote.files" :user="appearNote.user"/>
+					<MkMediaList :mediaList="appearNote.files" :user="appearNote.user" :is-note-sensitive="note.cw"/>
 				</div>
 				<MkPoll v-if="appearNote.poll" ref="pollViewer" :noteId="appearNote.id" :poll="appearNote.poll" :class="$style.poll"/>
 				<div v-if="isEnabledUrlPreview">
diff --git a/packages/frontend/src/components/MkSubNoteContent.vue b/packages/frontend/src/components/MkSubNoteContent.vue
index 8b0f981c3..c113a3aac 100644
--- a/packages/frontend/src/components/MkSubNoteContent.vue
+++ b/packages/frontend/src/components/MkSubNoteContent.vue
@@ -14,7 +14,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 	</div>
 	<details v-if="note.files && note.files.length > 0">
 		<summary>({{ i18n.tsx.withNFiles({ n: note.files.length }) }})</summary>
-		<MkMediaList :mediaList="note.files" :user="note.user"/>
+		<MkMediaList :mediaList="note.files" :user="note.user" :is-note-sensitive="note.cw"/>
 	</details>
 	<details v-if="note.poll">
 		<summary>{{ i18n.ts.poll }}</summary>
@@ -30,7 +30,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 </template>
 
 <script lang="ts" setup>
-import { ref } from 'vue';
+import {onMounted, ref} from 'vue';
 import * as Misskey from 'misskey-js';
 import MkMediaList from '@/components/MkMediaList.vue';
 import MkPoll from '@/components/MkPoll.vue';
@@ -44,6 +44,13 @@ const props = defineProps<{
 const isLong = shouldCollapsed(props.note, []);
 
 const collapsed = ref(isLong);
+
+onMounted(() => {
+	props.note.files.forEach((file) => {
+		file.isSensitive = props.note.cw !== null;
+	});
+});
+
 </script>
 
 <style lang="scss" module>
diff --git a/packages/frontend/src/pages/settings/general.vue b/packages/frontend/src/pages/settings/general.vue
index b2ca42b10..54b38427b 100644
--- a/packages/frontend/src/pages/settings/general.vue
+++ b/packages/frontend/src/pages/settings/general.vue
@@ -64,6 +64,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 				<MkSwitch v-model="showGapBetweenNotesInTimeline">{{ i18n.ts.showGapBetweenNotesInTimeline }}</MkSwitch>
 				<MkSwitch v-model="loadRawImages">{{ i18n.ts.loadRawImages }}</MkSwitch>
 				<MkSwitch v-model="disableCatSpeak">{{ i18n.ts.disableCatSpeak }}</MkSwitch>
+				<MkSwitch v-model="markIncomingMediaInCwedPostAsSensitive">{{ i18n.ts.markIncomingMediaInCwedPostAsSensitive }}</MkSwitch>
 				<MkRadios v-model="reactionsDisplaySize">
 					<template #label>{{ i18n.ts.reactionsDisplaySize }}</template>
 					<option value="small">{{ i18n.ts.small }}</option>
@@ -301,6 +302,7 @@ const disableShowingAnimatedImages = computed(defaultStore.makeGetterSetter('dis
 const forceShowAds = computed(defaultStore.makeGetterSetter('forceShowAds'));
 const loadRawImages = computed(defaultStore.makeGetterSetter('loadRawImages'));
 const disableCatSpeak = computed(defaultStore.makeGetterSetter('disableCatSpeak'));
+const markIncomingMediaInCwedPostAsSensitive = computed(defaultStore.makeGetterSetter('markIncomingMediaInCwedPostAsSensitive'));
 const highlightSensitiveMedia = computed(defaultStore.makeGetterSetter('highlightSensitiveMedia'));
 const imageNewTab = computed(defaultStore.makeGetterSetter('imageNewTab'));
 const warnMissingAltText = computed(defaultStore.makeGetterSetter('warnMissingAltText'));
diff --git a/packages/frontend/src/pages/settings/preferences-backups.vue b/packages/frontend/src/pages/settings/preferences-backups.vue
index ecafbec6c..5467be679 100644
--- a/packages/frontend/src/pages/settings/preferences-backups.vue
+++ b/packages/frontend/src/pages/settings/preferences-backups.vue
@@ -79,6 +79,7 @@ const defaultStoreSaveKeys: (keyof typeof defaultStore['state'])[] = [
 	'imageNewTab',
 	'dataSaver',
 	'disableCatSpeak',
+	'markIncomingMediaInCwedPostAsSensitive',
 	'disableShowingAnimatedImages',
 	'emojiStyle',
 	'disableDrawer',
diff --git a/packages/frontend/src/pages/user/index.files.vue b/packages/frontend/src/pages/user/index.files.vue
index f6d677c70..84b9519c5 100644
--- a/packages/frontend/src/pages/user/index.files.vue
+++ b/packages/frontend/src/pages/user/index.files.vue
@@ -33,6 +33,8 @@ import XVideo from '@/components/MkMediaVideo.vue';
 import XImage from '@/components/MkMediaImage.vue';
 import XBanner from '@/components/MkMediaBanner.vue';
 import { i18n } from '@/i18n.js';
+import {$i} from "@/account";
+import {defaultStore} from "@/store";
 
 const props = defineProps<{
 	user: Misskey.entities.UserDetailed;
@@ -51,7 +53,9 @@ onMounted(() => {
 		limit: 15,
 	}).then(notes => {
 		for (const note of notes) {
-			for (const file of note.files) {
+			for (let file of note.files) {
+				if (($i ? defaultStore.state.markIncomingMediaInCwedPostAsSensitive : true))
+					file.isSensitive = note.cw !== null
 				medias.value.push({
 					note,
 					file,
diff --git a/packages/frontend/src/pages/welcome.timeline.vue b/packages/frontend/src/pages/welcome.timeline.vue
index 35fde8c22..bdd81d4a9 100644
--- a/packages/frontend/src/pages/welcome.timeline.vue
+++ b/packages/frontend/src/pages/welcome.timeline.vue
@@ -14,7 +14,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 					<MkA v-if="note.renoteId" class="rp" :to="`/notes/${note.renoteId}`">RN: ...</MkA>
 				</div>
 				<div v-if="note.files.length > 0" :class="$style.richcontent">
-					<MkMediaList :mediaList="note.files" :user="note.user"/>
+					<MkMediaList :mediaList="note.files" :user="note.user" :is-note-sensitive="note.cw"/>
 				</div>
 				<div v-if="note.poll">
 					<MkPoll :noteId="note.id" :poll="note.poll" :readOnly="true"/>
diff --git a/packages/frontend/src/store.ts b/packages/frontend/src/store.ts
index fbc1d0567..c8b28d567 100644
--- a/packages/frontend/src/store.ts
+++ b/packages/frontend/src/store.ts
@@ -263,6 +263,10 @@ export const defaultStore = markRaw(new Storage('base', {
 		where: 'account',
 		default: false,
 	},
+	markIncomingMediaInCwedPostAsSensitive: {
+		where: 'account',
+		default: true,
+	},
 	emojiStyle: {
 		where: 'device',
 		default: 'twemoji', // twemoji / fluentEmoji / native