Satsuki, 32, has been married for six years. She met her husband through an adult dance club, but mismatched days off leave her lonely, and sex with her indifferent husband has nearly disappeared. Having lost confidence in herself as a woman, she learns about porn featuring ordinary housewives and decides to appear. After surrendering to adultery on a trip, she returns home determined it was her first and last affair—but two weeks later, she cheats again.