Yumi raised Kouta all by herself. Kouta safely enrolled in university and reached adulthood. She felt that child-rearing had finally settled down. It was around that time that she met a man through a friend's introduction. The man, Ohkawa, lived in Gunma. Though he seemed a bit flashy at first glance, he was sincere and kind, and Yumi found herself drawn to him. Despite the long-distance relationship, the two saw each other many times. As Yumi began to consider remarrying Ohkawa, she invited Kouta on a hot spring trip to Niigata…
