Chapter 9
After three sharp "Attention!" commands, Na Ye-jin stepped onto the scale, her ears unmistakably flushed even from behind. Her shoulders trembled faintly. It had just happened—she'd bent over, exposing her most intimate spot. No matter how bold and intimidating she was, that shock wouldn't fade easily. But Na Ye-jin was Na Ye-jin. After a brief hesitation, she spun around boldly. She didn't cover herself. The moment she turned, her arms snapped to her sides in perfect attention stance. Hesitation only made it worse—that was her creed, and she stuck to it.
I nearly stopped breathing. Na Ye-jin's naked body was right there in front of me. Those D-cup breasts I'd glimpsed several times already. Her dark red nipples stood out vividly under the fluorescent lights. Their full volume sagged slightly under gravity, but that only added to their natural, sensual allure. I was awestruck first. These breasts were awe-inspiring no matter how many times I saw them. Then my gaze drifted lower. Nothing. Where there should have been something, there was nothing. No pubic hair. The exact opposite of Yoon Seo-yeon's thick bush. Na Ye-jin's crotch was completely bare—not a single strand. I couldn't tell if she'd shaved it clean or if it was naturally like that—but the result was everything that should have been hidden by hair was fully exposed. I could see the slit. Her labia majora, a shade darker than the surrounding skin, were clearly visible. And between them, a thin closed line. Her most private woman's part, laid bare without even the curtain of pubic hair.
I felt like I was going to cum instead of pee. My cock throbbed like a heartbeat. Precum kept leaking out nonstop. I was at my limit. But—Na Ye-jin had her eyes squeezed shut. She, who had taken such a fierce attention stance, had her eyes closed. Her lips bitten tight, fists clenched at her sides. Her face was beet red all the way to her ears. I never imagined Na Ye-jin would blush like this. It must have been because of her lack of pubic hair. Yoon Seo-yeon felt shame from her thick bush, while Na Ye-jin felt it from everything being exposed without one. Ironically, both were humiliated by their pubic hair—one for having it, the other for not.
I moved beyond awe to reverence. Tearing my eyes from the urinal, I lifted my head fully. I scanned every inch of Na Ye-jin's nude body. Those D-cup breasts were still awe-inspiring. Her dark red nipples had a totally different erotic beauty from Yoon Seo-yeon's deep pink ones. But that first-time glimpse of a woman's slit—it was impossible to look away. The curve of her bare labia majora glistened faintly under the fluorescent light.
"Ahem." A cough. I reflexively looked toward the sound. Ha-young was standing there. Her face was ghostly pale. Eyes bulging, mouth corners drooping to the floor. I'd never seen that expression on her usually bright, smiling face. I quickly averted my eyes. My heart plummeted.
Then Yoon Seo-yeon's voice came from behind. "H-hey, aren't you going to pee soon?" Small and trembling. From her perspective—naked and lined up behind me—it must have looked like I'd been holding it all day just to ogle the girls' bodies.
I instinctively started to turn my head. "Don't look!" Yoon Seo-yeon's tiny scream burst out. At the same time, Ha-young yelled, "Hey, Han Si-woo! What the hell are you doing!?"
Right. Yoon Seo-yeon was naked behind me. I couldn't turn around. I snapped my head back to the urinal. Just then—maybe a hallucination—I thought I heard the researcher chuckle.
"Step down and line up behind the urinal."
The researcher spoke to Na Ye-jin. She climbed off the scale, covering herself with both hands as she passed me. She shot me a murderous glare. No words, but the message was clear. Na Ye-jin moved behind me. Now there were two naked women back there.
Ha-young grew frantic. "Hey, Si-woo, you're doing this on purpose, right?" Her voice held more anxiety than anger. Of course. She was next. Unless I peed, she'd have to bare herself right in front of me.
I whined back, "No, really... it just won't come out..."
It wasn't a lie. After seeing Na Ye-jin's bare crotch, there was no way my erection would go down. Yoon Seo-yeon's bushy mound followed by Na Ye-jin's smooth one—the contrast was too intense. My cock was rock-hard like stone, sphincter locked tight.
Ha-young bit her lip. She stood like that for a moment, then sighed and walked to the scale. My female friend. Same-department classmate. We'd eaten together since freshman year, gossiped, studied in the library. During exams, we'd KakaoTalk till dawn sharing study notes, played rock-paper-scissors for lunch spots. And now that Ha-young was stripping in front of me.
Standing before the scale, she carefully squatted and slid down her panties. Not boldly bending like Na Ye-jin, nor crouching like Yoon Seo-yeon. Knees together, she lowered slowly, minimizing exposure as she dragged them to her ankles. In that process—her bare ass came into view. The Ha-young I'd laughed and chatted with. Eaten with. Studied with. Her bare ass was right there. Everyday images overlapped with the scene in my head. Her bright smile asking, "Si-woo, what do you wanna eat today?" coexisting with her naked back as she removed her underwear.
That was—a totally different stimulus from Yoon Seo-yeon or Na Ye-jin. Ha-young glanced back slightly. Looked at me. Tears welled in her eyes. Not her usual bright, cheerful self. Shame and resentment mixed in her gaze. Why do you have to be here of all people? I felt the same. Why me, here?
A few seconds passed like that. "Hurry up and get on. We're short on time." The researcher urged, then added toward me, "And you, the guy there—shouldn't your pee be coming out by now?"
I blushed and bowed my head. Tried to relax my body somehow. Squeezed my eyes shut, cleared my mind. Recalled math formulas. Calculus. Laplace transforms. Nothing came. Only Yoon Seo-yeon's bush, Na Ye-jin's smooth crotch, Ha-young's pink nipples flooded in.
Ha-young saw me like that, sighed shortly, and stepped onto the scale. Then, moments later—she turned around. At a single glance from the researcher, her covering hands dropped, snapping into attention. She'd learned the pattern from Yoon Seo-yeon and Na Ye-jin. Protesting was useless.
Naked Ha-young glared at me. But I had to look up at her. Instinct. Smaller than Yoon Seo-yeon or Na Ye-jin, but perfectly proportioned breasts. At their tips, the purest-looking pink nipples. A bright, clear pink—different from Na Ye-jin's dark red or Yoon Seo-yeon's deep pink. Healthy and honest, like Ha-young's personality.
My gaze dropped lower. Faint pubic hair. Not thick like Yoon Seo-yeon's, not absent like Na Ye-jin's. A light, soft patch. Beneath it, the slit was vaguely visible, but not clearly. Three women, three colors.
"Han Si-woo! Just pee already!" Ha-young shouted. Her voice trembled, but she was trying to sound strong.
"If you move, we can't measure the weight. Stay still and quiet for a bit?" The researcher said coldly. Ha-young's mouth shut. Stuck in attention, she couldn't move or yell.
Staring at my female friend's nude body, I realized. Even after seeing the campus beauty Yoon Seo-yeon's nakedness and Na Ye-jin's bare crotch—even then, Ha-young was the most stimulating. Because she overlapped with her everyday self. Her bright smile, her confident stride, her voice calling "Si-woo!" All those normal images overlaid with her current nudity created a rush stronger than Yoon Seo-yeon's purity or Na Ye-jin's sexiness combined.

Ha-young felt my gaze too. Her eyes reddened, teeth gritted, goosebumps rising all over. But she could do nothing. Attention stance. No moving. Under the fluorescent lights, facing each other felt eternal.
"That's enough. Step down and line up behind." At the researcher's words, Ha-young sighed in relief, covering herself with both hands. She hurried off the scale to behind me. Now, nothing stood before me. Just the empty scale.
Yoon Seo-yeon's voice came from behind. "A bit faster..." Small and trembling. All three naked women in line must have felt the same. Wishing this nightmare would end.
Hearing that, tension oddly drained from my body. No more naked woman in front. Just empty scale and wall. And then—I felt it. Something stirred in my lower abdomen. Urine. A dribble came out. Erection made aiming tricky. Angle all wrong, nearly splashing outside. I hastily grabbed my cock and aimed at the hole.
Chiiii... A thin stream hit inside. At first a trickle, then stronger. Pressure released, pee gushed out. So relieving. But simultaneously, a weird awareness. Three naked women watching my peeing back.
Shiiiii— The sound echoed in the quiet exam room. Embarrassing. I never knew letting girls hear me pee felt this humiliating. But somehow stimulating too. I gritted my teeth, focused on peeing. Had to get it all in without spilling. Took a while. After finishing, I stepped aside.
The female researcher approached. "Then, remove the container under the urinal and give it to me, and replace it with this one." She handed me a new empty container. Without looking back, I squatted in front of the urinal and inspected the attachment. Pulled. Wouldn't budge. Twisted. No. The joint was hard to see from the front. Seemed wedged in shadow, hand couldn't reach.
As I struggled, the researcher said, "You have to go behind the urinal to pull it out. Be careful not to spill."
Without thinking, I went behind the urinal. The joint was visible. Simple lock from behind. Click, released and detached the container. Urine sloshed; I carefully handed it over. She gave me the new one. As I bent to reattach— they entered my view. Three women waiting naked. From behind the urinal, I had a full frontal view of the lineup. Yoon Seo-yeon, Na Ye-jin, Ha-young. All covering breasts and crotches with hands. But hands couldn't hide everything. Overflowing volume between fingers, uncovered thighs and bellies, white shoulders and collarbones, long legs. Three dazzling naked beauties lined up—it was a painting in itself. Incredibly stimulating.
My cock started throbbing again. The erection that had barely subsided shot back to max. It pulsed up and down. And all three women—were looking at it. Clearly, their gazes converged on my cock. Yoon Seo-yeon blushed and looked down, but her eyes kept drifting lower. Na Ye-jin glared teeth-gritted, but not at my face—down there. Ha-young stood frozen, mouth agape.
I hurriedly fitted the new container and returned to the front. My heart pounded wildly. Silence behind. Just the fluorescent hum.