Seikei Girls' Academy. Mizuki Kishimori, the student council president, and Ruriko Hayase, the former student council president, attempt to sneak into a special class given by the school president, Kumaki Mankichi, at the prestigious girls' school that attracts the attention of all boys. However, Ruriko, who attended the class first, suddenly changes her attitude, and Mizuki heads for the school president's office, where she finds a secret room for indecent acts... And Mizuki is unwittingly drawn into the dirty trap of Mitsuyoshi and even the board chairman, Yoshitsugu Katsumaru...
