After her husband's business failed, Miyuki, a wife, felt a little out of place living with her husband's parents. Meanwhile, her wealthy father-in-law Toshiharu has a strong libido even as he gets older, and is aroused by the beauty of his son's wife, Miyuki, and he thinks about how he can somehow have a relationship with her. Finally, Toshiharu can no longer endure anything, and he manipulates Miyuki so that she cannot resist him and is obedient to him, and he takes her virginity without any effort. Toshiharu gets a taste for this, and from that day on, he plays with Miyuki's body to his heart's content...