Couples swapping sex and mixed bathing hot spring trip 5 UMD-672

Two couples who were traveling to a hot spring together decided to swap wives at a mixed-gender hot spring because they wanted to have sex with each other's wives! It was a novel experience to have sex with someone else's wife! They engaged in orgy in an open-air bath, making joyful noises! A couples exchanging partners in a scene of debauchery!