Yuuki is a girl who lies about her gender to enroll in the theatre department of Getsuryou academy, an all boys' school where all the students are required to stay in the dorm. While hiding the fact that she's a girl, she tries hard to study acting, a subject that she loves very much. One day, an upperclassman, Riku, finds out about her secret, causing Yuuki to be very worried, but she gradually becomes attracted to him. At the same time, she comes to know the real reason why she was brought up as a boy.