A few years after remarrying, Mai was living a happy life surrounded by her loving husband and Kokoro-hearted son. One afternoon, a young salesman came in and handed her a business card with the name "Ito Koji" on it. It turned out to be the same name as her ex-husband's son! Though she was skeptical, Mai gently accepted the salesman's request not to recognize his mother, thinking it was atonement for her long-lost son, Koji. Gradually, her desire escalated... and the moment the salesman took off his pants, she had evidence that confirmed it was Koji...