You and Yunjun are roommates and we are nice and kind to each other. Yoonjun secretly likes the girl who is his roommate. But because the girl was in a relationship with another boy, she could not confess to him. The girl is beautiful, innocent and pure.Yoonjun is very sensitive about the girl and is jealous that someone is getting close to the girl. One night, the girl was dating her boyfriend Yeonjun was waiting for the girl to come home. It was 10 pm and he was very worried about the girl. He heard the doorbell and went to the door and opened it. He was shocked because the girl behind the door was crying.