Choi Sooyoung is perfectly happy with her life. She's working in the world’s most famous fashion company and she hasn’t got a worry in the world. That is until someone, that she never wanted to see again, shows up in her life—her ex best friend Oh Sehun, hint: EX best friend. He’s all too willing to reconcile, and she’s all too willing wanting him OUT of his life. Or does she?