[Shousuuha Jikkenshitsu] Kusuguri Egao Kenkyuu [Full Color]

Strapped spread-eagle to a clinical metal table, a small-breasted, dark-haired woman is mercilessly tickled by rotating bristle brushes wielded by gloved mechanical arms, her desperate laughter spiraling into frantic, half-sobbing screams as her toes curl and her hips squirm against the restraints. A digital monitor coolly observes, noting that "so her emotions are a function of the intensity of the stimuli," as the brushes torment her sensitive feet, bare skin, and inner thighs until she's utterly broken, gasping "I said stop" while drenched and humiliated. It's a relentless, full-color descent into helpless arousal and laughter-induced agony that leaves her completely at the mercy of the tickling machine.