HBAD-574 A plain big-breasted OL, Akase Nagako, was found having an affair in the office by a colleague and threatened, then had semen sprayed on her.

Shoko, the diligent and reliable accountant known for her unassuming demeanor. A male colleague accidentally catches Shoko, who has never been rumored to have any affairs, having an extramarital affair in the office during overtime. The man, who had been eyeing Shoko's body for some time, threatens to expose her affair and makes her do as he pleases, freely indulging in her body. Shoko gradually begins to feel excitement from being tormented like a sex toy…