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Saki, who was married to a kind husband and lived a fulfilling life, had only one problem. That was the lack of sex at night. Her husband had begun to avoid her desires. Then, her husband's boss, Kimura, came to visit her at home and suddenly raped her. After agonizing over it, she confessed to her husband, who told her that he had offered Saki as compensation for the wrongdoing he committed at the company. From then on, Saki endured being toyed with by Kimura for her husband's sake. However, a secret contract filled with her husband's desires had been made...