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Ami, a married woman, has come to live with her husband's father, Yasuzo. Yasuzo is unable to resist Ami's young body and rapes her. From then on, whenever he gets the chance, he plays with Ami's body, forces her to have sex with her husband, spies on her obscene behavior, and even commits immoral rape next to her son who is bedridden with a cold. Before she knows it, Ami is writhing in agony from her father-in-law's relentless assault...