A thorough investigation into the reality of mixed-gender open-air baths! This time, the target is a married couple who come to the mixed-gender bath together! The man who makes a move on his beloved wife in front of her husband, pretending to wash her back and rubbing his penis against her. The faithful wife shows off her erect penis only to her, and is aroused by it. The beautiful wife who seduces with a glimpse of her breasts secretly strokes him, and the wife who washes her husband's head is fucked from behind! The scary man who makes a move on his wife in front of her husband!