Chaerin is a cold hearted girl is a new student in the school. She always keeps everything to herself. Lack of friends as she never talke much in class. Zico is a playboy who goes around flirting and play with girls in the school. There is never a girl who couldnt get. Zico bet with his friends to be able to court chaerin in just 1 month. One day, another new student came in to join the class, Jay. Jay was Chaerin childhood friend and her first love.. What will happen next? Who will end up with Chaerin?