Prestige exclusive actress Airi Suzumura calls her student and plays with her every day! Suzumura, the swimming club advisor, indulges in masturbation every day without Uchimura, the ace. One day, she is caught masturbating at his desk, but she learns that he was also masturbating with Suzumura and had mutual feelings for her. Suzumura, who cannot contain his excitement, has a physical relationship with Uchimura and continues to do so in a forbidden manner.