The man Minako dated when she was 20 had a wife and children. When Minako became pregnant with her boy, she asked her to drop her, but Minako refused and disappeared from her man's sight, and she gave birth to Hiroaki alone. As she grew up as a single mother, every time she saw her son becoming more and more like her father, she was reminded of her old love. The two finally crossed the line, and since then they've been spending the night together almost every day. When Hiroaki turned 20, Minako invited her to a hot spring trip to commemorate her. She was wondering if Minako could continue her physical relationship as it is.
