Usui, who has been married for four years, is now a teacher at an English conversation school. She said that both husband and wife worked, and that they sometimes enjoyed holidays together. However, each other has been busy for about half a year, and the couple has been spending holidays separately. At that time, a student at her school confessed to him, and because of her loneliness, he had a physical relationship at least once. And when she crossed her line, she was fascinated by her immoral world, and she was unstoppable.
