Yongsun is so inlove with the popular boy in their school name Eric Nam. She wished that one day eric will notice her and love her as much as she loves him. Yongsun will give love letters,chocolates and etc to him but he just throw it away. When the day Eric announce that he is dating the popular girl in their school Yongsun world is crashed and she is so broken hearted. When her bestfriend helped her she is so happy but the rules change