Yunseong had this elaborate plan to get revenge on his old bullies from school, which he had put into action when he was sent to a Juvenile detention center by becoming a juvenile offender. He didn't seem like much to the other people in the detention center but he proved them wrong quickly by already beating the hell out of one his old bullies.

He didn't really care about the looks he got. He just wanted his plan for revenge to go smooth, even if that means he can't live a normal life yet.