Hain is a good girl. She always follows what's her family asked her to do. She's living alone in a apartment. She have a boyfriend and they're happy. Her life was fine not until the guy named south entered her life. The guy become her roommate and ruined her day. She thought she will always hate that guy, But something happened. Her enemy become her hero. What if her hero left her? That the guy he thought the man who saved her from drowning would drown her again? What will happen?