Mary was frustrated as her husband, busy with work, refused to have sex with her. When she learned at the hospital that his sperm was weak—making pregnancy nearly impossible unless a miracle occurred—her anxiety grew. One day, her father-in-law came to visit Tokyo. Excited about the prospect of a grandchild, he sensed Mary's distress and, after accidentally discovering her husband's infertility, secretly drugged her with an aphrodisiac. Questioning whether she was truly satisfied with her husband in bed, he declared it his duty as a father to take responsibility. He then forcefully had sex with Mary, creampieing her. Under the relentless effects of the aphrodisiac, Mary became increasingly aroused, eventually craving her father-in-law over her own husband.