At Dong Bang High School, things are about to get messy.

Being the the next inheriter of Korea's No. 1 company, Jung Yunho is known as the prince of the school- but he isn't exactly the nicest person in campus.

Being the son of the new principal, Kim Jaejoong isn't really a person whom everyone wants to sit with during lunch.

As Jaejoong's beautiful brother, Kim Junsu, attracts the attention of the prince's best buddy, Park Yoochun, Jaejoong is able to spend quite some time with Yunho, causing jealousy among the students. But, it seems like Jaejoong refuses to fall for any of Yunho's rare and sweet smiles and instead becomes closer to his enemy, the outcast of the school- Shim Changmin.