Rio is a diligent office lady who works in the office during the day. However, behind the scenes, she has another secret that she keeps secret: that of a men's beauty salon girl. One day, a colleague from work happens to stop by the salon and discovers her secret, forcing her into a sexually harassing beauty treatment. Her voluptuous, big-breasted, soft body and her obedient service gradually escalate the man's desire. In the office, at the beauty salon, or in the changing room, he's ready to have sex whenever he's called. Before long, Rio has become a subscription rejuvenation massage girl who can be made to ejaculate whenever she wants, using her J-cup breasts as a human toilet.