Deliver an S-lady from the SM club, pretend to be an M-man, and suddenly deprive her of freedom during play! Slap her face while she can't escape, reverse the master-servant relationship! Hold her head down and force hard irrumatio, spanking, and turn her expression from relaxed to begging for help! While being tortured with pleasure by the vibrator, she is forced to twist a huge dick into the person who was riding her and giving her cunnilingus just now! She should have been liberated, but she gradually awakens to the pleasure of being humiliated! Fourth installment of the S-lady!