To take care of his stepfather, the couple Ayu and Taro moved from Osaka to Tokyo. One day, while listening to a radio that Ayu had borrowed to pass the time, they heard news about a doctor's research stating, "Female bodily fluids, particularly vaginal secretions, are expected to have rejuvenating effects." The stepfather, upon hearing this, impulsively gathered his courage and begged Ayu for sexual intercourse…
