Kimi-ka, who divorced 10 years ago, raised Kouta single-handedly. Eventually, Kouta graduated from university and got a job at a printing company. However, since the commute takes more than 2 hours, Kimi-ka suggested that Kouta live alone. But Kouta refused. Kimi-ka became worried about Kouta, who neither goes out to play on his days off nor invites friends over, and decided to invite him on a hot spring trip.
