Minami dated a college student when she was in high school. After graduating, they both got jobs and continued dating. When Minami became pregnant, they got married at a young age. Raising a child was hard, but when they grew up, she had time for herself. Recently, Minami had secretly felt that her sexual desire had become stronger than before. Minami, who occasionally met up with friends outside, got to know an older man at a drinking party. After being invited by the older man to meet several times, they had a physical relationship.