Kimika, who divorced 10 years ago, has raised Kota single-handedly. Eventually, Kota graduated from university and got a job at a printing company. However, since it takes more than two hours to commute, Kimika recommends Kota to live alone. But Kouta refused. Kimika was worried about Kota, who didn't go out to play on his days off or invite his friends over, and invited him to a hot spring trip.
