Choi Lisa is Choi Seunghyun's sister and both of them are closed to each other. Eventhough the relationship between their appa and eomma is cracking, they still keep on enjoying their days. Lisa is a new student and she meets a guy named Kwon Jiyong aka GD. But GD always dissapears without her notice. Who is GD actually? Just then, she meets her love, Lee Seunghyun aka Seungri. How about GD? Does she has the same feelings towards GD and Seungri?