you and chuuya are childhood friends, you already know each other. and often share food, drinks etc. you, dazai, and chuuya are going to an amusement park. you are bored and go buy drinks. when you come back and sit next to chuuya, so close. you see a girl-ops, i mean yuan in front of chuuya looks very jealous seeing you guys closeness with chuuya.