When I, a jobless guy, went to help at my relative's hot spring inn, a group of young wives arrived! As soon as they got into the hot spring, they started showing off their huge breasts and having a lot of fun! When I peeked at that scene, I got caught and thought it was bad, but instead, I was invited to join them in mixed bathing! Being in that situation, I couldn't help but get an erection, and when the young wives saw my erect penis, their unsatisfied desires exploded! They showed off their big breasts and, while saying "just once!", they kept asking for my penis over and over again!!