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Bladder Observation 9: Ultimate Standing Piss Edition, Excretion Experiment Observation Series 25 Who's the JAV actress in this video? Amateur? Name revealed!

It's often said that the female body is made of curves, but a woman holding in urine displays those curves even more prominently. This video focuses on carefully observing how the bloated lower abdomen gradually deflates during urination. Four slender, attractive women endure extreme limits by following the rule: start only when they leak after holding it to the absolute maximum. Despite repeated delays, trembling knees, and mounting pressure, they push through. Their diverse, individual pissing styles captivate viewers. Two super slow-motion cameras capture in vivid detail the moment urine sprays from their crotches. The erotic progression unfolds through classic elements: bladder control, squirming, writhing, leg shaking, crotch rubbing, ultimate release, and standing urination—offering a full fetish experience of the female body and urination. Masumi, slender with beautiful legs, constantly crosses her legs, presses her heels together, and sensually grinds her hips—even during conversation. In the climax, she trembles and screams, "I'm peeing!", unleashing a powerful, laser-like stream that's absolutely stunning. Aya, with her well-proportioned figure, is an outgoing, expressive type whose humiliation is intense and visible. Her urine bursts out in a thick, forceful gush that's unmatched in strength and volume. Reika shocks everyone by confessing, "Holding my pee to the limit is actually pleasurable," and her proud, visibly swollen bladder remains prominent throughout filming. Her stream shoots straight down, soaking her legs completely. Midori constantly presses her crotch even during interviews, visibly squirming with humiliation. At one point, her powerful stream veers right, completely drenching her shoe. The distinct personality of each "excretion practitioner" breathes life into the entire production. ※Faces fully visible in main feature.