Ako Kimura is a prim, proper office worker whose male coworkers whisper about her L-cup tits. Tired of always feeling cold, she visits a discreet spa advertised as warming both body and mind. The soft-spoken male therapist coats her in a special oil that heats her from the inside. His careful massage soon turns filthy: every stroke sends a thick, sticky heat through her body and melts away her self-control. 'I've never felt anything like this...' When his hands finally reach her breasts and crotch, she convulses and screams through a back-arching orgasm so violent her heavy tits lift into the air. Even after the session, she cannot get that dirty heat out of her head. She keeps coming back for more, turning from the classy office lady everyone knows into a horny woman addicted to being rubbed until she cums.