I can do it too...

Yeo-ju, whose ex-boyfriend was stolen by a vixen at her previous school, transfers to that girl's school, where she reveals her current affair and the way she stole her boyfriend. Yeo-ju tries to steal Jung-kook away from her. However, Jung-kook overhears her talking to a friend and tells her they should break up. However, a few days later, because Jung-kook truly loves her, he tells her to start over. So, she finds out Jung-kook's true feelings, apologizes, and they start over... (Happy ending)