Yeonjun, he's your adopted brother. He seems to be quite fond of you. He doesn't have a lover and he doesn't want you to have a lover either. You know a guy, this makes him jealous and angry.

He hasn't talked to you in a while. Your parents and you don't know what's going on. He often avoids you and also flirts with you more. Today, you have a difficult problem and want to go to his room and ask him. You knock on his door, he turns to look at you with murderous eyes.