diff --git a/packages/backend/src/core/entities/NoteEntityService.ts b/packages/backend/src/core/entities/NoteEntityService.ts
index 985245aeb1..0d3a0d15b9 100644
--- a/packages/backend/src/core/entities/NoteEntityService.ts
+++ b/packages/backend/src/core/entities/NoteEntityService.ts
@@ -16,6 +16,7 @@ import { bindThis } from '@/decorators.js';
 import { DebounceLoader } from '@/misc/loader.js';
 import { IdService } from '@/core/IdService.js';
 import { ReactionsBufferingService } from '@/core/ReactionsBufferingService.js';
+import { isPackedPureRenote } from '@/misc/is-renote.js';
 import type { OnModuleInit } from '@nestjs/common';
 import type { CacheService } from '../CacheService.js';
 import type { CustomEmojiService } from '../CustomEmojiService.js';
@@ -122,29 +123,26 @@ export class NoteEntityService implements OnModuleInit {
 			} else if (packedNote.renote && (meId === packedNote.renote.userId)) {
 				hide = false;
 			} else {
-				if (packedNote.renote) {
-					const isFollowing = await this.followingsRepository.exists({
-						where: {
-							followeeId: packedNote.renote.userId,
-							followerId: meId,
-						},
-					});
+				// フォロワーかどうか
+				const isFollowing = await this.followingsRepository.exists({
+					where: {
+						followeeId: packedNote.userId,
+						followerId: meId,
+					},
+				});
 
-					hide = !isFollowing;
-				} else {
-					// フォロワーかどうか
-					const isFollowing = await this.followingsRepository.exists({
-						where: {
-							followeeId: packedNote.userId,
-							followerId: meId,
-						},
-					});
-
-					hide = !isFollowing;
-				}
+				hide = !isFollowing;
 			}
 		}
 
+		// If this is a pure renote (boost), then we should *also* check the boosted note's visibility.
+		// Otherwise we can have empty notes on the timeline, which is not good.
+		// Notes are packed in depth-first order, so we can safely grab the "isHidden" property to avoid duplicated checks.
+		// This is pulled out to ensure that we check both the renote *and* the boosted note.
+		if (packedNote.renote?.isHidden && isPackedPureRenote(packedNote)) {
+			hide = true;
+		}
+
 		if (!hide && meId && packedNote.userId !== meId) {
 			const isBlocked = (await this.cacheService.userBlockedCache.fetch(meId)).has(packedNote.userId);
 
diff --git a/packages/backend/src/misc/is-renote.ts b/packages/backend/src/misc/is-renote.ts
index c128fded14..99c755e38f 100644
--- a/packages/backend/src/misc/is-renote.ts
+++ b/packages/backend/src/misc/is-renote.ts
@@ -69,6 +69,14 @@ type PackedQuote =
 		fileIds: NonNullable<Packed<'Note'>['fileIds']>
 	});
 
+type PackedPureRenote = PackedRenote & {
+	text: NonNullable<Packed<'Note'>['text']>;
+	cw: NonNullable<Packed<'Note'>['cw']>;
+	replyId: NonNullable<Packed<'Note'>['replyId']>;
+	poll: NonNullable<Packed<'Note'>['poll']>;
+	fileIds: NonNullable<Packed<'Note'>['fileIds']>;
+}
+
 export function isRenotePacked(note: Packed<'Note'>): note is PackedRenote {
 	return note.renoteId != null;
 }
@@ -80,3 +88,7 @@ export function isQuotePacked(note: PackedRenote): note is PackedQuote {
 		note.poll != null ||
 		(note.fileIds != null && note.fileIds.length > 0);
 }
+
+export function isPackedPureRenote(note: Packed<'Note'>): note is PackedPureRenote {
+	return isRenotePacked(note) && !isQuotePacked(note);
+}