The young wife, Miho, who has started living with her father-in-law, finds herself the object of his lust for her youthful body. He takes advantage of her, and whenever he gets the chance, he toys with her body and subjects her to training. Gradually, Miho's sexual experiences even begin to influence her relationship with her husband. Unable to confess her physical relationship with her father-in-law to her husband, who is pleased with her transformation, Miho can no longer speak of it...
