Donghae-- a nerd in school who everyone bully. The worst part is he fell in love with his bully Eunhyuk. One day he when home from school and decided to change his appearance. He asked his crossdresing brother Heechul to makeup him into a girl. The next day when he got to school, people thought he was a female transfer student and started to befriend him. Funny part is that his bully Eunhyuk has started to lust after him since then. 

Eunhyuk doesn't know that the kid he used to bully all year around was the girl he was slowly falling in love with. Is it possible that maybe he knew all along that this girl was infact Donghae. And maybe this was a prank. Making Donghae to fall for him just to crush his heart. Or maybe he didn't know and was just doing what any teenager boys do "chase after pretty girls they want". 

And what is Heechul role in all of this. Was he just crossdressing for nothing or was it because he wanted to win someone over.