Umeda and Aki, who are in the same sales department, are secretly dating, but their relationship is not normal... They are in a master-slave relationship, and Aki can do whatever he wants to her, even while at work, playing with her with a remote vibrator. The more Aki is submissive, the more she moans with pleasure... After finishing her sales calls again today, she heads straight to the hotel and is violated at Umeda's mercy...!