When the men who visited the preliminary inspection of the dam construction got lost on the mountain road, they found an inn deep in the mountains. The three bewitching waitresses warmly welcome you as if they knew the men were coming. The waitresses suddenly turned into sluts and attacked the men! At night No, the slutty mature women who bite the penis with an obscene massage and won't allow it until the semen is exhausted. Before long, the men are transformed into servant slaves of the proprietress who is afflicted by a mysterious disease...