diff --git a/src/ai.ts b/src/ai.ts
index 90cb9a1..11018c8 100644
--- a/src/ai.ts
+++ b/src/ai.ts
@@ -172,6 +172,11 @@ export default class 藍 {
 			if (data.userId == this.account.id) return; // 自分は弾く
 			this.onReceiveMessage(new Message(this, data, true));
 		});
+
+		// 通知
+		mainStream.on('notification', data => {
+			this.onNotification(data);
+		});
 		//#endregion
 
 		// Install modules
@@ -277,6 +282,22 @@ export default class 藍 {
 		}
 	}
 
+	@autobind
+	private onNotification(notification: any) {
+		switch (notification.type) {
+			// リアクションされたら親愛度を少し上げる
+			// TODO: リアクション取り消しをよしなにハンドリングする
+			case 'reaction': {
+				const friend = new Friend(this, { user: notification.user });
+				friend.incLove(0.1);
+				break;
+			}
+
+			default:
+				break;
+		}
+	}
+
 	@autobind
 	private crawleTimer() {
 		const timers = this.timers.find();
diff --git a/src/friend.ts b/src/friend.ts
index 679ecd3..69e7b97 100644
--- a/src/friend.ts
+++ b/src/friend.ts
@@ -101,7 +101,7 @@ export default class Friend {
 	}
 
 	@autobind
-	public incLove() {
+	public incLove(amount = 1) {
 		const today = getDate();
 
 		if (this.doc.lastLoveIncrementedAt != today) {
@@ -112,20 +112,25 @@ export default class Friend {
 		if (this.doc.lastLoveIncrementedAt == today && (this.doc.todayLoveIncrements || 0) >= 3) return;
 
 		if (this.doc.love == null) this.doc.love = 0;
-		this.doc.love++;
+		this.doc.love += amount;
 
 		// 最大 100
 		if (this.doc.love > 100) this.doc.love = 100;
 
 		this.doc.lastLoveIncrementedAt = today;
-		this.doc.todayLoveIncrements = (this.doc.todayLoveIncrements || 0) + 1;
+		this.doc.todayLoveIncrements = (this.doc.todayLoveIncrements || 0) + amount;
 		this.save();
+
+		this.ai.log(`💗 ${this.userId} +${amount}`);
 	}
 
 	@autobind
-	public decLove() {
+	public decLove(amount = 1) {
+		// 親愛度MAXなら下げない
+		if (this.doc.love === 100) return;
+
 		if (this.doc.love == null) this.doc.love = 0;
-		this.doc.love--;
+		this.doc.love -= amount;
 
 		// 最低 -30
 		if (this.doc.love < -30) this.doc.love = -30;
@@ -136,6 +141,8 @@ export default class Friend {
 		}
 
 		this.save();
+
+		this.ai.log(`💢 ${this.userId} -${amount}`);
 	}
 
 	@autobind