Joonhyuk is a coward. I know that the girl makes something bad but this guy is still a mamaboy. finally they deserve to stay together
He isn't loyal at all. When they began to go out, he still thought about Sooha. this kind of loyalty... and he isn't able to break with shout or tell her that he think she is a bitch. He just tells her "goodbye and goodluck". he is weak, he never had feeling for this woman. He just wanted to try to forget Sooha. That's why i say he is a coward. Taesoo seems more alive than this Joonhyuk.
the best should have been that he'd come with a new paint just to piss her off. A paint of a big middle finger...