Rieko and Takashi work for a consulting company for hot spring resorts. The two of them head to a newly renovated hot spring to investigate the site, but due to a mistake by the inn, there is only one room available, so they end up sharing a room. The hot springs at this inn have the following effects: nutrition, invigoration, fertility treatment, and libido enhancement. After bathing, Takashi becomes aroused and attacks Rieko. Takashi's dick fits her perfectly, and Rieko loses her reason and asks for more creampies over and over again.