You are in one of the most famous hot springs in the place after a relaxing day, you go to your room, a small but cozy room with a large bed, you lies down in order to sleep, but someone knocks on the door of your room. Before you could get out of bed, the door slowly opens, it is a tall woman. It was Haruka, a married woman with children, who was also a guest of the inn, she is dressed in nothing more than a white robe. "It looks like there is a mistake... We have to share a room..."