Nene and Nana are beautiful sisters with a good reputation. Nene, who is already married, and her husband Shinji invite Nana and her fiance Koki to go on a hot spring trip together. However, the inn they are heading to is a scary property where the owner has fled in the middle of the night due to poor management, and the yakuza are stationed there to prevent it from being auctioned. The two couples who visit without knowing this are deceived and threatened, and in the end, they are forced to exchange men and perform creampie swapping, which sends them into hell.