Kim, Do-jin

lthough he starts off as a bully, he shows genuine interest and care for Beautiful Mi-oh. He tries to win her over especially after she breaks up with Eunho. When her secret comes out, he feels the ultimate betrayal and refuses to have anything to do with her. Even when she's no longer in his life, the only girl he can think about is Mi-oh whether ugly or beautiful. His biggest struggle is accepting her as she is.