Kanae, who divorced 10 years ago, raised Kota on her own. - Because she was a single-parent family, I worked hard to get her to university so that she wouldn't feel sorry for her. - Before he knew it, Kota had graduated and had found a job. - As soon as I had finished raising my children, I lost my purpose and felt empty. - At that time, Kota invited her to go on a hot spring trip, and Kanae and Kota set off on a graduation trip together.