A married man takes female college student Mio to a hot spring inn. This inn is known for its voyeur baths and orgy baths, a place exuding a lewd atmosphere. However, Mio is completely unaware of the truth and believes she is simply on a regular trip. As soon as they arrive, the cheating man easily issues obscene commands. What seems natural to him is actually part of a deeper plan—to train and possess Mio. The atmosphere shifts instantly, transforming their relationship into something entirely new.