Manami, a married woman, sees her son's friend masturbating in the bathroom. The image of a man's genitals, which she hasn't seen in a long time, is burned into her mind, and Manami is unable to sleep. When she is left alone with her friend, who is staying over, he makes advances on her. Unable to reject him, who sees her as a woman despite being older than him, Manami crosses the line. Although she feels guilty about her husband being away from home, she cannot let go of the young man's body. In this immoral affair, the married woman is engulfed in irresistible pleasure...