When I, an unemployed man, went to help out at a hot spring inn run by a relative, a group of young wives showed up! As soon as they got into the hot spring, the young wives showed off their huge tits that were so big they floated in the bathtub, and had a great time! I thought it would be dangerous if I was found while peeking at such a scene, but instead they invited me to join them in a mixed bath! In that situation, I couldn't hold back my erection, and the young wives' frustration exploded when they saw my erect penis! They showed off their huge tits and asked for my penis over and over again, saying "Just once!"!