[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. She unleashes her perversion, performs intense cunnilingus on him, and then has sex with him and cums inside him! From then on, they have sex covered in bodily fluids after work, secretly cunnilingus on him during work hours, and have intense sex with him and cum inside him... The lives of the two people who never intersected become male and female only inside the company and overlap violently...