Two women hired as filming models for medical education. The office lady is stripped naked, subjected to pelvic examinations, and displays erotic reactions when sensitive areas are touched. Meanwhile, a female student suffering from constipation is forced to undergo direct manual evacuation, with fingers inserted into her anus to extract fecal matter—an extremely humiliating experience. What was supposed to be a medical experiment gradually loses its clinical pretense, leaving both women with profound physical and psychological regret.