Aoi, whose husband was fired from his company and was struggling financially, came to Ozawa's company for an interview. It was a clerical position, but Ozawa proposed that Aoi work as his secretary. The salary is doubled, but it includes a mistress contract. Even though she's called a mistress, there's no physical relationship, just kissing. Aoi accepts those conditions for the sake of her livelihood. However, Aoi, who found Ozawa's kisses lewd and pleasurable like intercourse between a dick and a pussy, breaks her promise herself and ends up seeking a physical relationship with Ozawa...