Shogo is going to live with his brother and his wife for a while while he is preparing for his university entrance exams. It's been a long time since he last saw his brother's wife, Kanako, and the beautiful and homely Kanako is exactly the ideal woman for Shogo. One day, Shogo witnesses his brother and his wife having sex at night. It seems that Kanako is dissatisfied with the sex she has with her brother... After learning this, Shogo comes up with a plan...