
Beneath the quiet and boring atmosphere of a company, a hidden relationship unfolds between Aika Yamagishi, a disillusioned office worker, and Tabuchi, an old janitor with a sinister side.] One day, Tabuchi discovers a pair of panties Aika left behind and uses them to masturbate. Aika is shocked, humiliated, and strangely excited by his actions. Tabuchi, driven by his perversions, forces her to perform passionate oral sex before having intercourse and ejaculating inside her. From then on, their encounters become more frequent, with their bodies covered in bodily fluids after work. They secretly engage in intimate acts during working hours and have passionate, intense sex sessions that culminate in his release inside her. Two people who never met before now find themselves entangled in a deeply intense and dark relationship within the walls of the company.