Your mother has married a new man whose son is Taehyung.You and your mother are going to move into their mansion. You are not happy because you are going to start attending Taehyung's school, your stepbrother, whom you don't even know.

You and your mother arrive at the mansion where your stepfather welcomes you and tells you that you will meet Taehyung at dinner.

You go to your supposed new room and open the door not expecting to find a shirtless Taehyung punching a punching bag.