Kyoko Kubo, a married woman with a wonderful smile who met at the beach in Kamakura, is a mother of two children who has a son in the third grade of college and a son in the first grade of elementary school. Her eldest son recently began hinting at his marriage to her, and she decided to make her appearance driven by her impatience as a woman that "she might have grandchildren." Her smile disappears from her who was embarrassed at first by her rich SEX for the first time in 7 years, and she becomes addicted to her pleasure.
