Hashiba Reiko returns as a trainee teacher to the high school she graduated. Until recently, she was a B-grade idol actress known as Ichinoe Kirina. She gave up the career, and became missing for one year. And now she decides to be a school teacher. She causes a sensation in the school, although she was far from top class idol, still famous. Among the students there is Reiko's younger sister Rika. Among the teachers there is Reiko's elder sister Kanae. Each of the sisters have a problem towards the end of the year. Rika is asked to be naked in a film her boyfriend is making. Kanae had a quarrel with her husband and went too far to back down. Now she stays in her parents' place. Reiko is worried about the book her ex-manager is going to publish, which will expose many things about her.