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Her husband's father wants to sell the house to her, so she goes to her husband's parents' house to complete the paperwork. Yui trusts her kind and considerate father-in-law, but he witnesses her having sex with her husband, and the next day when they are alone, he tells her that he can satisfy her better and rapes her. Yui resists, but she becomes addicted to the pleasure as her father-in-law makes her cum over and over again...