diff --git a/src/ai.ts b/src/ai.ts
index 1c60743..582a9bd 100644
--- a/src/ai.ts
+++ b/src/ai.ts
@@ -30,6 +30,10 @@ export type InstallerResult = {
 	timeoutCallback?: TimeoutCallback;
 };
 
+export type Meta = {
+	lastWakingAt: number;
+};
+
 /**
  * 藍
  */
@@ -41,6 +45,9 @@ export default class 藍 {
 	private contextHooks: { [moduleName: string]: ContextHook } = {};
 	private timeoutCallbacks: { [moduleName: string]: TimeoutCallback } = {};
 	public db: loki;
+	public lastSleepedAt: number;
+
+	private meta: loki.Collection<Meta>;
 
 	private contexts: loki.Collection<{
 		isDm: boolean;
@@ -96,6 +103,8 @@ export default class 藍 {
 	@autobind
 	private run() {
 		//#region Init DB
+		this.meta = this.getCollection('meta', {});
+
 		this.contexts = this.getCollection('contexts', {
 			indices: ['key']
 		});
@@ -113,6 +122,9 @@ export default class 藍 {
 		});
 		//#endregion
 
+		const meta = this.getMeta();
+		this.lastSleepedAt = meta.lastWakingAt;
+
 		// Init stream
 		this.connection = new Stream();
 
@@ -173,6 +185,8 @@ export default class 藍 {
 		this.crawleTimer();
 		setInterval(this.crawleTimer, 1000);
 
+		setInterval(this.logWaking, 10000);
+
 		this.log(chalk.green.bold('Ai am now running!'));
 	}
 
@@ -258,6 +272,13 @@ export default class 藍 {
 		}
 	}
 
+	@autobind
+	private logWaking() {
+		this.setMeta({
+			lastWakingAt: Date.now(),
+		});
+	}
+
 	/**
 	 * データベースのコレクションを取得します
 	 */
@@ -395,4 +416,31 @@ export default class 藍 {
 
 		this.log(`Timer persisted: ${module.name} ${id} ${delay}ms`);
 	}
+
+	@autobind
+	public getMeta() {
+		const rec = this.meta.findOne();
+
+		if (rec) {
+			return rec;
+		} else {
+			const initial: Meta = {
+				lastWakingAt: Date.now(),
+			};
+
+			this.meta.insertOne(initial);
+			return initial;
+		}
+	}
+
+	@autobind
+	public setMeta(meta: Partial<Meta>) {
+		const rec = this.getMeta();
+
+		for (const [k, v] of Object.entries(meta)) {
+			rec[k] = v;
+		}
+
+		this.meta.update(rec);
+	}
 }
diff --git a/src/index.ts b/src/index.ts
index 7faa7cf..92cee26 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -26,6 +26,7 @@ import FollowModule from './modules/follow';
 import ValentineModule from './modules/valentine';
 import MazeModule from './modules/maze';
 import ChartModule from './modules/chart';
+import SleepReportModule from './modules/sleep-report';
 
 console.log('   __    ____  _____  ___ ');
 console.log('  /__\\  (_  _)(  _  )/ __)');
@@ -75,6 +76,7 @@ promiseRetry(retry => {
 		new KeywordModule(),
 		new MazeModule(),
 		new ChartModule(),
+		new SleepReportModule(),
 	]);
 }).catch(e => {
 	log(chalk.red('Failed to fetch the account'));
diff --git a/src/modules/sleep-report/index.ts b/src/modules/sleep-report/index.ts
new file mode 100644
index 0000000..bda02cc
--- /dev/null
+++ b/src/modules/sleep-report/index.ts
@@ -0,0 +1,35 @@
+import autobind from 'autobind-decorator';
+import Module from '../../module';
+import serifs from '../../serifs';
+
+export default class extends Module {
+	public readonly name = 'sleepReport';
+
+	@autobind
+	public install() {
+		this.report();
+
+		return {};
+	}
+
+	@autobind
+	private report() {
+		const now = Date.now();
+
+		const sleepTime = now - this.ai.lastSleepedAt;
+
+		const sleepHours = sleepTime / 1000 / 60 / 60;
+
+		if (sleepHours < 0.1) return;
+
+		if (sleepHours >= 1) {
+			this.ai.post({
+				text: serifs.sleepReport.report(Math.round(sleepHours))
+			});
+		} else {
+			this.ai.post({
+				text: serifs.sleepReport.reportUtatane
+			});
+		}
+	}
+}
diff --git a/src/serifs.ts b/src/serifs.ts
index 6103ca3..a32acea 100644
--- a/src/serifs.ts
+++ b/src/serifs.ts
@@ -355,6 +355,11 @@ export default {
 		post: 'インスタンスの投稿数です！',
 		foryou: '描きました！'
 	},
+
+	sleepReport: {
+		report: hours => `んぅ、${hours}時間くらい寝ちゃってたみたいです`,
+		reportUtatane: 'ん... うたた寝しちゃってました',
+	},
 };
 
 export function getSerif(variant: string | string[]): string {