There's a mixed-gender hot spring where couples who visit always end up witnessing the same scene. Believing the rumors, we conducted a hidden camera investigation—and sure enough, we found a middle-aged couple openly having sex in broad daylight. As we filmed their passionate act in the outdoor bath, a 30-year-old milf noticed us and approached, her breasts fully exposed. Then she made an offer: "Hey, big guy, wanna switch partners?" The rumors were true! What's more, the woman who invited me was incredibly attractive. As time passed, another couple entered the bath—this time a pair in their 40s. After we started having sex and set the mood, the two came closer, stripping off their clothes and revealing their bodies. Soon, the situation escalated into a full-blown partner swap...!!