A high school girl will do anything to meet and get close to a boy she idolizes. Jae Hee (Sulli) is in love with Tae Joon (Choi Minho), a pole-jumping gold medalist. She discovers that he attends high school at an all-boys’ school, so she cuts her hair and pretends to be a boy to be admitted to the school. But she soon learns that trying to blend in with the boys and keep her true identity a secret are no easy tasks. How long can she keep up the ruse, and will it all be worth the effort in the end?