Married to her husband for three years... Sairi, living a happy life with him. One day, as she was folding laundry like usual, a masked man suddenly burst into the house and raped her. The man's true identity was her husband's younger brother, Kouji. Successful at work, living in a nice house, with a beautiful wife living happily... Such a brother made Kouji harbor intense feelings of inferiority and an uncontrollable sexual urge towards Sairi, driving him mad...
