Kaoru, who divorced her husband, raised Yuki with just one woman. I worked desperately not to make him feel pity and went to college. When I noticed, Yuki was at the age of graduating from university, and the city hall had also decided on a job offer. While feeling relieved to raise a child, he lost his life goals and was living an empty life, but Yuki was invited to a hot spring trip saying, "I want to aim for the hardships I've had so far." Kaoru and Yuki set out on a graduation trip for only two people.
