Married receptionist Sumire Minato secretly appears in porn without telling her husband. A month after her first shoot, she is called back during her workday because she cannot forget sex with porn performers. She has a brazen daytime affair, writhing through orgasms while slick with oil despite having work left to do. After work she is taken away for her first threesome with two men, followed by affectionate first-person sex. Rediscovering the thrill of cheating leaves her unable to return to ordinary life.