Mahiro, who had been close to her husband like an older brother since childhood, married him a few years ago. One day, she received a call from her in-laws saying that her brother-in-law Shiro was injured and asked if she could take care of him for a week. Mahiro disliked the gazes of her father-in-law and brother-in-law, as well as the dark atmosphere of her husband's family home. Reluctantly, she ended up going to her in-laws' house. However, the injury was merely an excuse to do whatever they wanted with her. Drugs were mixed into the meal served by her father-in-law, and Mahiro was unable to resist, becoming prey to the rape mansion...
