Mahiro has been married for several years to her childhood friend and husband whom she looked up to like an older brother. One day, she receives a call from her husband's family asking if she can look after her brother-in-law Shiro for a week because he has been injured. Mahiro doesn't like the stares of her father-in-law and brother-in-law, and the dark atmosphere of her husband's family home. She reluctantly heads to her husband's family home, but her injury is just an excuse to do whatever they want with Mahiro. Her father-in-law mixes drugs into the food he serves her, and without being allowed to resist, she becomes the victim of the rape mansion...