Mahiro has been married for several years to her childhood friend and husband, whom she loved like an older brother. One day, she receives a call from her husband's family asking if she could take care of him for a week because her brother-in-law, Shiro, was injured. Mahiro didn't like the way her father-in-law and brother-in-law looked at her, and the dark atmosphere in her husband's home. She reluctantly heads to her husband's parents' house, but her injury is just an excuse for her to do whatever she wants with Mahiro. Mahiro's food served to her by her father-in-law is mixed with drugs, and Mahiro is unable to resist and falls prey to a rape house.