In a cramped, dimly-lit Tokyo office, four colleagues gather after hours for an illicit foursome. Secretary Karin Asahi, a busty brunette in stockings, takes charge, sucking off her boss while two younger interns, Ryo Ryo and Rei Tamaki, worship her body. The room fills with the sounds of wet pussy and slapping skin as they switch positions - doggystyle, cowgirl, missionary - until all four are covered in sweat and juices.