The popular all-boys high school in Seoul was known for the intelligent students. Among the crowd of boys, there's a girl... What? Chaeyeon attended the school with the name Jihoon. The worst part is that, she shares a room with Park Chanyeol and is stuck with his friends. She had a life or death reason to come here, and that wasn't for hanging around with perverted teenage boys that jump around. However destiny turns the table, the more closer to the truth she gets, the worse everything turns into.