diff --git a/CHANGELOG.md b/CHANGELOG.md
index b33f0e3df..faaac57de 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -19,6 +19,8 @@
 - Feat: サーバーサイレンス機能が追加されました
 - Enhance: 依存関係の更新
 - Enhance: 新規にフォローした人のをデフォルトでTLに追加できるように
+- Enhance: HTLとLTLを2023.10.0アップデート以前まで遡れるように
+- Enhance: フォロー/フォロー解除したときに過去分のHTLにも含まれる投稿が反映されるように
 
 ### Client
 - Enhance: TLの返信表示オプションを記憶するように
diff --git a/packages/backend/src/core/FunoutTimelineService.ts b/packages/backend/src/core/FunoutTimelineService.ts
index 512b2d983..c633c329e 100644
--- a/packages/backend/src/core/FunoutTimelineService.ts
+++ b/packages/backend/src/core/FunoutTimelineService.ts
@@ -77,4 +77,9 @@ export class FunoutTimelineService {
 			);
 		});
 	}
+
+	@bindThis
+	public purge(name: string) {
+		return this.redisForTimelines.del('list:' + name);
+	}
 }
diff --git a/packages/backend/src/core/UserFollowingService.ts b/packages/backend/src/core/UserFollowingService.ts
index 7548e3d28..4d7e14f68 100644
--- a/packages/backend/src/core/UserFollowingService.ts
+++ b/packages/backend/src/core/UserFollowingService.ts
@@ -29,6 +29,7 @@ import { CacheService } from '@/core/CacheService.js';
 import type { Config } from '@/config.js';
 import { AccountMoveService } from '@/core/AccountMoveService.js';
 import { UtilityService } from '@/core/UtilityService.js';
+import { FunoutTimelineService } from '@/core/FunoutTimelineService.js';
 import Logger from '../logger.js';
 
 const logger = new Logger('following/create');
@@ -83,6 +84,7 @@ export class UserFollowingService implements OnModuleInit {
 		private webhookService: WebhookService,
 		private apRendererService: ApRendererService,
 		private accountMoveService: AccountMoveService,
+		private funoutTimelineService: FunoutTimelineService,
 		private perUserFollowingChart: PerUserFollowingChart,
 		private instanceChart: InstanceChart,
 	) {
@@ -288,8 +290,8 @@ export class UserFollowingService implements OnModuleInit {
 			this.perUserFollowingChart.update(follower, followee, true);
 		}
 
-		// Publish follow event
 		if (this.userEntityService.isLocalUser(follower) && !silent) {
+			// Publish follow event
 			this.userEntityService.pack(followee.id, follower, {
 				detail: true,
 			}).then(async packed => {
@@ -302,6 +304,8 @@ export class UserFollowingService implements OnModuleInit {
 					});
 				}
 			});
+
+			this.funoutTimelineService.purge(`homeTimeline:${follower.id}`);
 		}
 
 		// Publish followed event
@@ -355,8 +359,8 @@ export class UserFollowingService implements OnModuleInit {
 
 		this.decrementFollowing(following.follower, following.followee);
 
-		// Publish unfollow event
 		if (!silent && this.userEntityService.isLocalUser(follower)) {
+			// Publish unfollow event
 			this.userEntityService.pack(followee.id, follower, {
 				detail: true,
 			}).then(async packed => {
@@ -369,6 +373,8 @@ export class UserFollowingService implements OnModuleInit {
 					});
 				}
 			});
+
+			this.funoutTimelineService.purge(`homeTimeline:${follower.id}`);
 		}
 
 		if (this.userEntityService.isLocalUser(follower) && this.userEntityService.isRemoteUser(followee)) {
@@ -707,4 +713,12 @@ export class UserFollowingService implements OnModuleInit {
 			});
 		}
 	}
+
+	@bindThis
+	public getFollowees(userId: MiUser['id']) {
+		return this.followingsRepository.createQueryBuilder('following')
+			.select('following.followeeId')
+			.where('following.followerId = :followerId', { followerId: userId })
+			.getMany();
+	}
 }
diff --git a/packages/backend/src/server/api/endpoints/notes/local-timeline.ts b/packages/backend/src/server/api/endpoints/notes/local-timeline.ts
index d39b0358f..9d5688f96 100644
--- a/packages/backend/src/server/api/endpoints/notes/local-timeline.ts
+++ b/packages/backend/src/server/api/endpoints/notes/local-timeline.ts
@@ -5,7 +5,6 @@
 
 import { Brackets } from 'typeorm';
 import { Inject, Injectable } from '@nestjs/common';
-import * as Redis from 'ioredis';
 import type { MiNote, NotesRepository } from '@/models/_.js';
 import { Endpoint } from '@/server/api/endpoint-base.js';
 import { NoteEntityService } from '@/core/entities/NoteEntityService.js';
@@ -16,6 +15,7 @@ import { IdService } from '@/core/IdService.js';
 import { CacheService } from '@/core/CacheService.js';
 import { isUserRelated } from '@/misc/is-user-related.js';
 import { FunoutTimelineService } from '@/core/FunoutTimelineService.js';
+import { QueryService } from '@/core/QueryService.js';
 import { ApiError } from '../../error.js';
 
 export const meta = {
@@ -59,9 +59,6 @@ export const paramDef = {
 @Injectable()
 export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-disable-line import/no-default-export
 	constructor(
-		@Inject(DI.redisForTimelines)
-		private redisForTimelines: Redis.Redis,
-
 		@Inject(DI.notesRepository)
 		private notesRepository: NotesRepository,
 
@@ -71,6 +68,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 		private idService: IdService,
 		private cacheService: CacheService,
 		private funoutTimelineService: FunoutTimelineService,
+		private queryService: QueryService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
 			const untilId = ps.untilId ?? (ps.untilDate ? this.idService.gen(ps.untilDate!) : null);
@@ -106,49 +104,75 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 
 			noteIds = noteIds.slice(0, ps.limit);
 
-			if (noteIds.length === 0) {
-				return [];
-			}
+			if (noteIds.length > 0) {
+				const query = this.notesRepository.createQueryBuilder('note')
+					.where('note.id IN (:...noteIds)', { noteIds: noteIds })
+					.innerJoinAndSelect('note.user', 'user')
+					.leftJoinAndSelect('note.reply', 'reply')
+					.leftJoinAndSelect('note.renote', 'renote')
+					.leftJoinAndSelect('reply.user', 'replyUser')
+					.leftJoinAndSelect('renote.user', 'renoteUser')
+					.leftJoinAndSelect('note.channel', 'channel');
 
-			const query = this.notesRepository.createQueryBuilder('note')
-				.where('note.id IN (:...noteIds)', { noteIds: noteIds })
-				.innerJoinAndSelect('note.user', 'user')
-				.leftJoinAndSelect('note.reply', 'reply')
-				.leftJoinAndSelect('note.renote', 'renote')
-				.leftJoinAndSelect('reply.user', 'replyUser')
-				.leftJoinAndSelect('renote.user', 'renoteUser')
-				.leftJoinAndSelect('note.channel', 'channel');
+				let timeline = await query.getMany();
 
-			let timeline = await query.getMany();
-
-			timeline = timeline.filter(note => {
-				if (me && (note.userId === me.id)) {
-					return true;
-				}
-				if (!ps.withReplies && note.replyId && (me == null || note.replyUserId !== me.id)) return false;
-				if (me && isUserRelated(note, userIdsWhoBlockingMe)) return false;
-				if (me && isUserRelated(note, userIdsWhoMeMuting)) return false;
-				if (note.renoteId) {
-					if (note.text == null && note.fileIds.length === 0 && !note.hasPoll) {
-						if (me && isUserRelated(note, userIdsWhoMeMutingRenotes)) return false;
-						if (ps.withRenotes === false) return false;
+				timeline = timeline.filter(note => {
+					if (me && (note.userId === me.id)) {
+						return true;
 					}
+					if (!ps.withReplies && note.replyId && (me == null || note.replyUserId !== me.id)) return false;
+					if (me && isUserRelated(note, userIdsWhoBlockingMe)) return false;
+					if (me && isUserRelated(note, userIdsWhoMeMuting)) return false;
+					if (note.renoteId) {
+						if (note.text == null && note.fileIds.length === 0 && !note.hasPoll) {
+							if (me && isUserRelated(note, userIdsWhoMeMutingRenotes)) return false;
+							if (ps.withRenotes === false) return false;
+						}
+					}
+
+					return true;
+				});
+
+				// TODO: フィルタした結果件数が足りなかった場合の対応
+
+				timeline.sort((a, b) => a.id > b.id ? -1 : 1);
+
+				process.nextTick(() => {
+					if (me) {
+						this.activeUsersChart.read(me);
+					}
+				});
+
+				return await this.noteEntityService.packMany(timeline, me);
+			} else { // fallback to db
+				const query = this.queryService.makePaginationQuery(this.notesRepository.createQueryBuilder('note'),
+					ps.sinceId, ps.untilId, ps.sinceDate, ps.untilDate)
+					.andWhere('(note.visibility = \'public\') AND (note.userHost IS NULL)')
+					.innerJoinAndSelect('note.user', 'user')
+					.leftJoinAndSelect('note.reply', 'reply')
+					.leftJoinAndSelect('note.renote', 'renote')
+					.leftJoinAndSelect('reply.user', 'replyUser')
+					.leftJoinAndSelect('renote.user', 'renoteUser');
+
+				this.queryService.generateVisibilityQuery(query, me);
+				if (me) this.queryService.generateMutedUserQuery(query, me);
+				if (me) this.queryService.generateBlockedUserQuery(query, me);
+				if (me) this.queryService.generateMutedUserRenotesQueryForNotes(query, me);
+
+				if (ps.withFiles) {
+					query.andWhere('note.fileIds != \'{}\'');
 				}
 
-				return true;
-			});
+				const timeline = await query.limit(ps.limit).getMany();
 
-			// TODO: フィルタした結果件数が足りなかった場合の対応
+				process.nextTick(() => {
+					if (me) {
+						this.activeUsersChart.read(me);
+					}
+				});
 
-			timeline.sort((a, b) => a.id > b.id ? -1 : 1);
-
-			process.nextTick(() => {
-				if (me) {
-					this.activeUsersChart.read(me);
-				}
-			});
-
-			return await this.noteEntityService.packMany(timeline, me);
+				return await this.noteEntityService.packMany(timeline, me);
+			}
 		});
 	}
 }
diff --git a/packages/backend/src/server/api/endpoints/notes/timeline.ts b/packages/backend/src/server/api/endpoints/notes/timeline.ts
index c0b78b8ee..8660e1602 100644
--- a/packages/backend/src/server/api/endpoints/notes/timeline.ts
+++ b/packages/backend/src/server/api/endpoints/notes/timeline.ts
@@ -5,8 +5,7 @@
 
 import { Brackets } from 'typeorm';
 import { Inject, Injectable } from '@nestjs/common';
-import * as Redis from 'ioredis';
-import type { NotesRepository, FollowingsRepository, MiNote } from '@/models/_.js';
+import type { NotesRepository } from '@/models/_.js';
 import { Endpoint } from '@/server/api/endpoint-base.js';
 import { QueryService } from '@/core/QueryService.js';
 import ActiveUsersChart from '@/core/chart/charts/active-users.js';
@@ -16,6 +15,7 @@ import { IdService } from '@/core/IdService.js';
 import { CacheService } from '@/core/CacheService.js';
 import { isUserRelated } from '@/misc/is-user-related.js';
 import { FunoutTimelineService } from '@/core/FunoutTimelineService.js';
+import { UserFollowingService } from '@/core/UserFollowingService.js';
 
 export const meta = {
 	tags: ['notes'],
@@ -53,9 +53,6 @@ export const paramDef = {
 @Injectable()
 export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-disable-line import/no-default-export
 	constructor(
-		@Inject(DI.redisForTimelines)
-		private redisForTimelines: Redis.Redis,
-
 		@Inject(DI.notesRepository)
 		private notesRepository: NotesRepository,
 
@@ -64,6 +61,8 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 		private idService: IdService,
 		private cacheService: CacheService,
 		private funoutTimelineService: FunoutTimelineService,
+		private userFollowingService: UserFollowingService,
+		private queryService: QueryService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
 			const untilId = ps.untilId ?? (ps.untilDate ? this.idService.gen(ps.untilDate!) : null);
@@ -84,49 +83,114 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 			let noteIds = await this.funoutTimelineService.get(ps.withFiles ? `homeTimelineWithFiles:${me.id}` : `homeTimeline:${me.id}`, untilId, sinceId);
 			noteIds = noteIds.slice(0, ps.limit);
 
-			if (noteIds.length === 0) {
-				return [];
-			}
+			if (noteIds.length > 0) {
+				const query = this.notesRepository.createQueryBuilder('note')
+					.where('note.id IN (:...noteIds)', { noteIds: noteIds })
+					.innerJoinAndSelect('note.user', 'user')
+					.leftJoinAndSelect('note.reply', 'reply')
+					.leftJoinAndSelect('note.renote', 'renote')
+					.leftJoinAndSelect('reply.user', 'replyUser')
+					.leftJoinAndSelect('renote.user', 'renoteUser')
+					.leftJoinAndSelect('note.channel', 'channel');
 
-			const query = this.notesRepository.createQueryBuilder('note')
-				.where('note.id IN (:...noteIds)', { noteIds: noteIds })
-				.innerJoinAndSelect('note.user', 'user')
-				.leftJoinAndSelect('note.reply', 'reply')
-				.leftJoinAndSelect('note.renote', 'renote')
-				.leftJoinAndSelect('reply.user', 'replyUser')
-				.leftJoinAndSelect('renote.user', 'renoteUser')
-				.leftJoinAndSelect('note.channel', 'channel');
+				let timeline = await query.getMany();
 
-			let timeline = await query.getMany();
-
-			timeline = timeline.filter(note => {
-				if (note.userId === me.id) {
-					return true;
-				}
-				if (isUserRelated(note, userIdsWhoBlockingMe)) return false;
-				if (isUserRelated(note, userIdsWhoMeMuting)) return false;
-				if (note.renoteId) {
-					if (note.text == null && note.fileIds.length === 0 && !note.hasPoll) {
-						if (isUserRelated(note, userIdsWhoMeMutingRenotes)) return false;
-						if (ps.withRenotes === false) return false;
+				timeline = timeline.filter(note => {
+					if (note.userId === me.id) {
+						return true;
 					}
-				}
-				if (note.reply && note.reply.visibility === 'followers') {
-					if (!Object.hasOwn(followings, note.reply.userId)) return false;
+					if (isUserRelated(note, userIdsWhoBlockingMe)) return false;
+					if (isUserRelated(note, userIdsWhoMeMuting)) return false;
+					if (note.renoteId) {
+						if (note.text == null && note.fileIds.length === 0 && !note.hasPoll) {
+							if (isUserRelated(note, userIdsWhoMeMutingRenotes)) return false;
+							if (ps.withRenotes === false) return false;
+						}
+					}
+					if (note.reply && note.reply.visibility === 'followers') {
+						if (!Object.hasOwn(followings, note.reply.userId)) return false;
+					}
+
+					return true;
+				});
+
+				// TODO: フィルタした結果件数が足りなかった場合の対応
+
+				timeline.sort((a, b) => a.id > b.id ? -1 : 1);
+
+				process.nextTick(() => {
+					this.activeUsersChart.read(me);
+				});
+
+				return await this.noteEntityService.packMany(timeline, me);
+			} else { // fallback to db
+				const followees = await this.userFollowingService.getFollowees(me.id);
+
+				//#region Construct query
+				const query = this.queryService.makePaginationQuery(this.notesRepository.createQueryBuilder('note'),
+					ps.sinceId, ps.untilId, ps.sinceDate, ps.untilDate)
+					.innerJoinAndSelect('note.user', 'user')
+					.leftJoinAndSelect('note.reply', 'reply')
+					.leftJoinAndSelect('note.renote', 'renote')
+					.leftJoinAndSelect('reply.user', 'replyUser')
+					.leftJoinAndSelect('renote.user', 'renoteUser');
+
+				if (followees.length > 0) {
+					const meOrFolloweeIds = [me.id, ...followees.map(f => f.followeeId)];
+
+					query.andWhere('note.userId IN (:...meOrFolloweeIds)', { meOrFolloweeIds: meOrFolloweeIds });
+				} else {
+					query.andWhere('note.userId = :meId', { meId: me.id });
 				}
 
-				return true;
-			});
+				this.queryService.generateVisibilityQuery(query, me);
+				this.queryService.generateMutedUserQuery(query, me);
+				this.queryService.generateBlockedUserQuery(query, me);
+				this.queryService.generateMutedUserRenotesQueryForNotes(query, me);
 
-			// TODO: フィルタした結果件数が足りなかった場合の対応
+				if (ps.includeMyRenotes === false) {
+					query.andWhere(new Brackets(qb => {
+						qb.orWhere('note.userId != :meId', { meId: me.id });
+						qb.orWhere('note.renoteId IS NULL');
+						qb.orWhere('note.text IS NOT NULL');
+						qb.orWhere('note.fileIds != \'{}\'');
+						qb.orWhere('0 < (SELECT COUNT(*) FROM poll WHERE poll."noteId" = note.id)');
+					}));
+				}
 
-			timeline.sort((a, b) => a.id > b.id ? -1 : 1);
+				if (ps.includeRenotedMyNotes === false) {
+					query.andWhere(new Brackets(qb => {
+						qb.orWhere('note.renoteUserId != :meId', { meId: me.id });
+						qb.orWhere('note.renoteId IS NULL');
+						qb.orWhere('note.text IS NOT NULL');
+						qb.orWhere('note.fileIds != \'{}\'');
+						qb.orWhere('0 < (SELECT COUNT(*) FROM poll WHERE poll."noteId" = note.id)');
+					}));
+				}
 
-			process.nextTick(() => {
-				this.activeUsersChart.read(me);
-			});
+				if (ps.includeLocalRenotes === false) {
+					query.andWhere(new Brackets(qb => {
+						qb.orWhere('note.renoteUserHost IS NOT NULL');
+						qb.orWhere('note.renoteId IS NULL');
+						qb.orWhere('note.text IS NOT NULL');
+						qb.orWhere('note.fileIds != \'{}\'');
+						qb.orWhere('0 < (SELECT COUNT(*) FROM poll WHERE poll."noteId" = note.id)');
+					}));
+				}
 
-			return await this.noteEntityService.packMany(timeline, me);
+				if (ps.withFiles) {
+					query.andWhere('note.fileIds != \'{}\'');
+				}
+				//#endregion
+
+				const timeline = await query.limit(ps.limit).getMany();
+
+				process.nextTick(() => {
+					this.activeUsersChart.read(me);
+				});
+
+				return await this.noteEntityService.packMany(timeline, me);
+			}
 		});
 	}
 }