Mako is a married woman who has been married for four years. One day, her husband brings his young subordinate, Shoji, to their home. When she opens the door to go to the bathroom, she sees Mako in her underwear. She sees him looking at her…I’m a mean person who wants to embarrass him…” Shoji’s desire is uncontrollable, and that night he invades her futon and demands her body. That day, they fall into the sex of asking each other’s cock to the point of sweating in the close proximity of their husbands….