A hidden mixed-bath hot spring deep in the mountains of a certain prefecture. From midday, numerous "married women" gather here, making it a well-known yet highly secretive spot. During busy daytime hours, women appear openly, soaking in the hot spring without covering their bodies. At this spring, some women deliberately expose themselves to male guests, and rumors about their bold behavior continue to spread. A cameraman equipped with a hidden camera sneaks into this secret hot spring resort. Upon arrival, he finds numerous married women already soaking in the bath. Among them are women who intentionally flaunt their bodies to men, their actions unabashedly daring. When approached, they calmly engage in conversation despite their breasts being clearly visible. Further scenes show wives touching the man's body and manually stimulating his penis. As the crowd thins and they find themselves alone, the encounter escalates into full intercourse.