[These kinds of women are incredibly erotic. A sticky slut swamp that you can't escape from!] Mami is a plain office lady, the only woman in her department. Hirai, the company's biggest playboy, approaches her on a whim, even though he has a girlfriend, and is convinced that he can invite her to his house and have sex with her. However, she is a lot better than that...! "You've never had your girlfriend do this to you...?" He licks all over her body with a grin, entangling both her upper and lower mucous membranes at the same time... There's no way he can escape from this sex...!