Izumi, who has been staying at his grandmother's house, which runs a popular bath "Daikokuyu" in Higashiyama, Kyoto since spring, to attend a junior college. At first glance, it looks like a normal public bath, but it was a mysterious bathhouse where the entrance leads to a different world when the curtain is turned over at 3 o'clock. One day, a customer who had unkempt hair and hadn't taken a bath for years. Izumi, who seems to be a good guest named Kamogawa, decided to do Sansuke in a private room at the order of his grandmother. He doesn't want to take a bath because he hates water, and when he polishes his whole body, he has the best handsome guy! !! The bathhouse TL sent by the river god with weak mentality and a courageous female college student is now open.