diff --git a/package.json b/package.json
index a1c746f..7487031 100644
--- a/package.json
+++ b/package.json
@@ -2,6 +2,7 @@
   "name": "ai",
   "main": "./built/index.js",
   "scripts": {
+    "start": "node ./built",
     "build": "tsc"
   },
   "dependencies": {
diff --git a/src/index.ts b/src/index.ts
index 3d5da75..5219265 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,5 +1,6 @@
 import 藍 from './ai';
 import config from './config';
+
 import ReversiModule from './modules/reversi';
 import ServerModule from './modules/server';
 import PingModule from './modules/ping';
@@ -8,9 +9,13 @@ import FortuneModule from './modules/fortune';
 import GuessingGameModule from './modules/guessing-game';
 import KeywordModule from './modules/keyword';
 import WelcomeModule from './modules/welcome';
+import TimerModule from './modules/timer';
+
 import * as request from 'request-promise-native';
 const promiseRetry = require('promise-retry');
 
+console.log('starting ai...');
+
 promiseRetry(retry => {
 	return request.post(`${config.apiUrl}/i`, {
 		json: {
@@ -18,6 +23,8 @@ promiseRetry(retry => {
 		}
 	}).catch(retry);
 }).then(account => {
+	console.log('account fetched');
+
 	const ai = new 藍(account);
 
 	ai.install(new PingModule());
@@ -27,5 +34,8 @@ promiseRetry(retry => {
 	ai.install(new GuessingGameModule());
 	ai.install(new ServerModule());
 	ai.install(new ReversiModule());
+	ai.install(new TimerModule());
 	if (config.keywordEnabled) ai.install(new KeywordModule());
+
+	console.log('ai started');
 });
diff --git a/src/modules/guessing-game/index.ts b/src/modules/guessing-game/index.ts
index 00b1b0f..e8b619c 100644
--- a/src/modules/guessing-game/index.ts
+++ b/src/modules/guessing-game/index.ts
@@ -24,7 +24,7 @@ export default class GuessingGameModule implements IModule {
 	}
 
 	public onMention = (msg: MessageLike) => {
-		if (msg.text && msg.text.includes('数当て')) {
+		if (msg.text && (msg.text.includes('数当て') || msg.text.includes('数あて'))) {
 			const exist = guesses.findOne({
 				userId: msg.userId,
 				isEnded: false
diff --git a/src/modules/reversi/index.ts b/src/modules/reversi/index.ts
index b3e7ef2..e185f61 100644
--- a/src/modules/reversi/index.ts
+++ b/src/modules/reversi/index.ts
@@ -40,7 +40,7 @@ export default class ReversiModule implements IModule {
 	}
 
 	public onMention = (msg: MessageLike) => {
-		if (msg.text && (msg.text.includes('リバーシ') || msg.text.toLowerCase().includes('reversi'))) {
+		if (msg.text && (msg.text.includes('リバーシ') || msg.text.includes('りばーし') || msg.text.includes('オセロ') || msg.text.includes('おせろ') || msg.text.toLowerCase().includes('reversi'))) {
 			if (config.reversiEnabled) {
 				msg.reply(serifs.REVERSI_OK);
 
diff --git a/src/modules/timer/index.ts b/src/modules/timer/index.ts
new file mode 100644
index 0000000..bf74ee2
--- /dev/null
+++ b/src/modules/timer/index.ts
@@ -0,0 +1,47 @@
+import 藍 from '../../ai';
+import IModule from '../../module';
+import MessageLike from '../../message-like';
+import serifs from '../../serifs';
+
+export default class TimerModule implements IModule {
+	public name = 'timer';
+	private ai: 藍;
+
+	public install = (ai: 藍) => {
+		this.ai = ai;
+	}
+
+	public onMention = (msg: MessageLike) => {
+		const seconds = (msg.text || '').match(/([0-9]+)秒/);
+		const minutes = (msg.text || '').match(/([0-9]+)分/);
+		const hours = (msg.text || '').match(/([0-9]+)時間/);
+		const timeStr = seconds || minutes || hours;
+
+		if (timeStr) {
+			const num = parseInt(timeStr[1], 10);
+
+			if (num <= 0) {
+				msg.reply(serifs.timer.invalid);
+				return true;
+			} else {
+				msg.reply(serifs.timer.set);
+
+				const time =
+					seconds ? 1000 * num :
+					minutes ? 1000 * 60 * num :
+					hours ? 1000 * 60 * 60 * num * 1000 :
+					null;
+
+				setTimeout(() => {
+					this.ai.sendMessage(msg.userId, {
+						text: serifs.timer.notify.replace('{time}', timeStr[0])
+					});
+				}, time);
+
+				return true;
+			}
+		} else {
+			return false;
+		}
+	}
+}
diff --git a/src/serifs.ts b/src/serifs.ts
index 0d27901..9a9f135 100644
--- a/src/serifs.ts
+++ b/src/serifs.ts
@@ -91,4 +91,10 @@ export default {
 	 * キーワード
 	 */
 	KEYWORD: '({word}..... {reading}..... 覚えました)',
+
+	timer: {
+		set: 'わかりました！',
+		invalid: 'うーん...？',
+		notify: '{time}経ちましたよ！'
+	}
 };