Izumi has been boarding at her grandmother's house, which runs the 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 many years. Izumi, who seems to be a good customer named Kamogawa, decided to help Sansuke in a private room at the order of her grandmother. He doesn't want to take a bath because he hates water, and when he polishes his whole body, there is a superb handsome guy! !! The bathhouse TL sent by the river god with weak mentality and a courageous female college student is now open.