Called to a hot spring inn to attend guests is a masseuse known for her perverted, lewd treatments. Unaware she is being secretly filmed, she succumbs to sexual stimulation from the guests, exposing her shameful behavior. The first guest is a beautiful woman in her late twenties who, upon receiving erotic massage, is penetrated by the man's penis and writhes in ecstasy. The second is a flashy lingerie-clad office lady who, though initially hesitant about the obscene treatment, soon pants heavily and cries out in pleasure as a thick cock thrusts into her. The third is a prim, big-breasted office worker who, under the influence of alcohol, willingly accepts the man's erect shaft, straddles him, and wildly grinds her hips in uninhibited arousal.