At an ordinary massage salon, therapists with beautiful asses gradually turn legitimate treatments into something dangerously erotic, making their clients hard. Whispering that it must remain a secret, they escalate from rubbing cocks between their ass cheeks to laying each man flat on the bed and riding him with relentless pile-driver strokes while he stays completely still. From a cheerful newcomer to a naughty veteran and a sexually frustrated married woman, each therapist leaves her client helpless with expert hip work.