The reasons married women turn to prostitution vary, each acting according to their own circumstances. Yuko is preparing to have a child, Arisa needs money for a house and her child's education, and Kaori does it simply to pass the time. Not all of them necessarily crave another man's cock, but they're driven by the desire for money. Among them, some fulfill their own desires through physical encounters with men other than their husbands. The secret nighttime lives these married women lead hold meaning beyond mere survival.