On the day of the proposal I had been eagerly waiting for, Han Taemin, who had once been my entire world, chose another woman. And not just anyone… but Joo Haena, the very girl who made my school years a living hell. Faced with his shameless behavior, I made up my mind: I would get my revenge. So, I’m going to do every awful thing I can, and I'll do it with your friend, Yoon Jeha.