Hyunjin and You were college enemies, the reason was a past relationship in which you and hyunjin both got cheated by the same person. You were in your college for your first day and ended up having to share a dorm with not anyone else but Hyunjin, your core enemy whom you hated. Hyunjin hated you equally as well...but one day something happened, the person who cheated of both of you somehow bought you. You had no other choise but go with him. (You are Yang Jeongin)