Yui Misaki, a housewife who feels dissatisfied with her ordinary life. Her relationship with her husband is also cold, and there is almost no nighttime activity. One day, she was invited by a friend to work as a housekeeper at the home of an acquaintance artist. She was hired immediately, but she was worried that beautiful women were visiting every day. And then, Yui, who had entered the workroom where she was forbidden to enter, witnessed the sight of a woman bound with ropes, moaning and enjoying herself…