After missing the last train following office drinks, the narrator stays at Manager Arai's home and discovers her relentlessly dominant side. Drunk and teasing, she asks whether he was staring at her breasts, then plays with his cock until her technique makes him explode immediately. Once she discovers he is a premature ejaculator, she tests how many times she can make him cum. Her expert blowjobs and filthy talk awaken unexpected stamina, and she keeps getting him hard again after every load from Friday night through Monday morning.