There was a rumored love hotel in a certain provincial city. At that hotel, maniacs with perverted hobbies seem to be having an orgy party. The sign of "participation OK" is that slippers are stuck in the door of the room. Rin, who works seriously without knowing that it is a den of perverts, one day, when she was cleaning the room, she forgot to put away her slippers and stuck them in her door. She doesn't know that it will be a trigger to get involved in the circle of men with perverted habits.
