Keito Aoyama was a child actress whose career ended after she froze on stage for 15 minutes and ended her career. Even though she is now 16, the incident between her and Nako and that fateful day on stage remain in her head and she is unable to move forward. But her life changes when she meets the principal of the "free school" where students can come and go as they wish. Keito begins to attend the school and befriends 3 of its students.