[A secret relationship between a frustrated career woman and a dull, virile old man!] Tabuchi, a cleaning worker, discovers the panties that career woman Ayaka has thrown away and masturbates to them! Ayaka is shocked, scorned, and excited when she sees them. He unleashes his perversion, makes her perform intense cunnilingus, and then has sex with her and cums inside her! From then on, they have sex covered in bodily fluids after work, secretly cunnilingus during work hours, and have intense sex and cum inside her... The lives of the two people who never intersected become male and female only inside the company and overlap violently...