Miho, a young wife who ends up living with her father-in-law. Her father-in-law is lustful for Miho's young body and rapes her. Then, when he sees a chance, he plays with her unfloated body and trains her. Miho's girlfriend changes to the point where she has sex with her husband. Miho can no longer reveal her physical relationship with her father-in-law to her husband, who is pleased with the change in Miho...