A few years after remarriage... Mai was spending happy days surrounded by her loving husband and kind son. In the early afternoon, a young salesman came to the office and handed him a business card with the name "Koji Ito." It was the same last name as the son with the husband who broke up! Mai gently accepts the salesman's wish that she doesn't know her mother, even though she doubts it, as compensation for her separated son, Koji. Gradually, the desire escalates ... At the moment the salesman took off his pants, there was some evidence that convinced him that it was Koji ....