[No title provided]
As I stepped into the A Building exam room for the physical verification still in our underwear, the white walls and fluorescent lights stabbed at my eyes. The spacious gym-like area was lined with all sorts of exercise equipment and measuring devices. With the 20 male participants lined up in formation, a researcher in a white lab coat stepped forward.
"Alright, before we begin the physical exam, we'll conduct the fitness verification."
Fitness verification? For a new drug trial?
"The experimental drug for this clinical trial places a certain level of strain on the body during administration. Therefore, anyone without baseline fitness will be sent home for safety reasons."
A murmur rippled through the participants instantly.
"What? Sent home after coming all this way?"
"They said five million won, but now a fitness test too?"
"This is bullshit—no prior notice about this."
Grouses erupted here and there, but the researcher continued calmly.
"This is an essential procedure for your safety. We appreciate your understanding."
What could we do if it was for safety? We all grumbled but nodded. No one was giving up five million won.
"For the fitness verification, you'll need to wear the sensors we provide."
The researcher pointed to the devices on the table: a watch-like gadget for the wrist and a belt-like device for the waist. Round sensors dangled from the belt, connected by wires.
"We'll attach these sensors to various parts of your body and verify they're properly placed during the test. Therefore..."
The researcher paused briefly, then said matter-of-factly,
"Please remove all clothing except your underwear."
......What?
"Wait, take off our clothes?"
Someone asked in a flustered voice. I couldn't believe my ears either.
"The sensors must be attached directly to the skin for accurate data. If you're uncomfortable, feel free to leave."
Leave. That word shut everyone up every time. The power of five million won was immense. I hesitated for a moment, but hey, it was just guys, right? We'd changed in the locker room already—underwear shouldn't be a big deal.
But there was a problem. Not all the researchers were men. Three of them in white lab coats were women—pretty young ones, late twenties to early thirties.
In underwear in front of female researchers?
I glanced around; the other guys wore similar expressions. I wasn't the only one embarrassed. But no one was backing out. Shame was a luxury before five million won.
I squeezed my eyes shut and stripped off my lab clothes top and bottom. All that remained was my black trunk briefs. The cold air hit my bare skin, sending chills over my whole body. The cold hit first—but yeah, the embarrassment was pretty intense too.
"Alright, form lines. We'll attach the sensors in order."
Four lines formed, each manned by a researcher for sensor duty. I joined the third line—and realized too late, after the guy ahead of me finished, that my line's researcher was a woman.
......Why her, of all people.
The woman, who looked about thirty, glanced up at me with a professional expression.
"Wrist first, please."
"Uh, yeah......"
Strapping the watch-like device on my wrist was fine. The trouble came next.
"Putting on the waist belt now. Stand still."
As she wrapped the belt around my waist, her hand naturally brushed my side and stomach. The soft touch of her fingers on my bare skin made my whole body twitch.
"Two on the chest."
Round sensors went one on each pec. When her fingers pressed above my chest to secure them, my heart started pounding like crazy.
"One on the side, two on the back."
She circled me, attaching sensors. My shoulders hunched with every touch.
"One each on the inner thighs. Spread your legs a bit."
"Y-Yes?! Uh, yeah, okay."
My voice jumped an octave. I awkwardly parted my legs, and her hand headed for my inner thighs.
Calm down, Han Si-woo. This is medical procedure. Medical. She's doing it mechanically, no emotions.
My brain got it, but my body didn't listen. I felt my face heat up to my ears.
"All set. Let me check if the sensors are reading properly."
She peered at her tablet, then her eyes widened.
"Uh......"
"W-What's wrong?"
"No, your heart rate......"
She started to say something but clamped her mouth shut—too late. A nearby male researcher glanced at my tablet and blurted,
"Hey, this guy's at 147 BPM. Fitness test hasn't even started!"
.......
The room went dead silent for a second.
Then,
"Puhahaha!"
"147? For real?"
"147 just from attaching sensors? Impressive!"
Laughter exploded among the male participants. I wanted to sink into the earth right there.
"I-It was just the stimulation, not like that......"
My excuses drowned in the laughter. As I stepped out of line after sensor attachment, whispers stabbed my ears from behind.
"Virgin alert."
"First time feeling a woman's touch?"
"Gonna have a heart attack before the test even starts."
......Virgin? Yeah, true—but did they have to say it out loud? Head down, I slunk to a corner. My face burned so hot the sensors might melt.
Thankfully, things calmed down after a bit. All 20 of us got our sensors on, and the real fitness verification began.
"We'll divide into four groups of five. Cycle through chin-ups, sit-ups, push-ups, and side-step tests in order, then finish with a 4km run for everyone."
I was in group 2. First event: chin-ups.
My leg's only been better a short while since the injury...... Should be fine, right?
A twinge of anxiety, but I had decent baseline fitness from hopping between part-time gigs. It had toughened me up naturally.
I gripped the bar and pulled up. One, two, three...... Surprisingly easy. Muscles strained, but manageable.
Ten, eleven, twelve...... Arms started shaking, but I gritted my teeth. Thirteen, fourteen, fifteen. No more.
I dropped and landed; the researcher noted it.
"Fifteen. Solid."
Decent score—most others were around ten. Good, no way I'm flunking this.
Gaining some confidence, I headed for sit-ups—when the researchers suddenly got noisy.
"Hold up, data's not coming in."
"Main computer's down."
"What? Now?"
They clustered around the computer, tapping keys, checking cables, shaking heads. Soon, one stepped forward.
"Sorry, everyone. Issue with the main computer here. Repair will take time, so we'll move to another fitness verification room for the rest."
Another move? We all sighed in annoyance.
"Ugh, seriously...... Is all this walking the real test?"
Someone grumbled, but no choice. In our underwear, we followed the researchers down the hall—a procession of 20 scantily clad guys. Quite the sight.
"Here we are. Go on in."
The researcher opened the door. One step inside, my eyes bulged.
"......Huh?"
The same reaction echoed from behind, ahead, everywhere.
"What the?!"
It was the right room—but not empty. Twenty female participants were already mid-fitness verification. All in underwear.
Bras and panties only, women working out on equipment right before our eyes.
"Kyaaah!"
"What?! Why are guys here?!"
"Get out! Get out!"
Screams filled the gym. Girls reflexively covered with arms, hid behind machines, huddled clutching mats. Instant chaos.
The guys were stunned too. But honestly? Eyes didn't know where to land—but they wandered anyway.
A researcher stepped up and shouted,
"Calm down! The men's room computer broke, so we have to do it together here. If you can't accept it, we'll send you home now."
Home again. The magic word. Girls exchanged glances, whispering.
"What do we do? Really together?"
"Leaving means no five million......"
"There were guys among the researchers anyway......"
In the end, no one left. Even the girls had to swallow their shame for five million. Still uncomfortable, but they slowly dropped arms and returned to positions.
I tried acting natural, gluing my eyes to the floor. But they wouldn't obey. My gaze swept the room unconsciously—and spotted long, familiar black hair in a corner.
Yoon Seo-yeon. In pure white bra and panties. Her white skin blended so seamlessly with the white underwear, the boundaries almost vanished. Arms hugging her chest, head down, ears beet red.
Beside her stood Na Ye-jin. Black lace underwear in stark contrast, arms crossed, glaring daggers at us guys. Face full of fury—but that pose only accentuated her cleavage, which she seemed oblivious to.
Yoon Seo-yeon's C-cup breasts were slightly squished between her arms; Na Ye-jin's fuller D-cups bulged prominently over her crossed arms. Down to slim waists, smooth thighs peeking past underwear lines......
No, Han Si-woo. Don't look. Looking now makes you subhuman.
Brain knew it. Eyes didn't care.
And a bigger problem: things down below were stirring.
No! Just one layer of underwear—if this pops up, I'm done!
I clenched my teeth, reciting multiplication tables. 7×8=56, 7×9=63, 8×7=56...... Barely, barely held it back.
Forcing my gaze away—then locked eyes with someone. Park Ha-young. Arms wrapped around herself, her face twisted when she spotted me. Shooting me a dirty look, she mouthed,
'You're. Dead?'
I whipped my head away. Cold sweat trickled down my back.
"Ahem."
I fake-coughed and moved to my spot per instructions. Glancing around, I wasn't alone—some guys already had...... tents pitched in front.
The girls who noticed? Pure contempt in their eyes.
"......That guy's the worst."
"Ew, pervert?"
Whispers spread through the gym. Erect guys fumbled to cover or turn away. Those glares terrified me; I vowed not to look at the girls. Eyes only on floor and equipment.
Floor, equipment, floor, equipment. Nothing else. See nothing.
But.
Arriving at the sit-up mats, my resolve crumbled spectacularly. Yoon Seo-yeon was doing sit-ups on one.
Every time she lifted her torso, the breasts inside her white bra jiggled up and down. Compressed on the rise, rippling on the fall.
Uwaaaah.
Not just me—every male participant, even the male researchers, eyes locked on Yoon Seo-yeon.
Her face flushed red— from exercise or shame? Eyes seemed misty.
Still, teeth gritted, she kept going.
Then.
"Hey!"
Na Ye-jin's sharp voice rang out.
"What're you staring at?! Turn away!"
Na Ye-jin glared at the guys with blazing eyes. In underwear herself, but her intimidation felt fully armored.
"I'll report every staring creep! Heads around—now!"
Guys flinched and looked away. Me too, dropping to the floor.
But two seconds later.
Eyes crept back to Yoon Seo-yeon. Mine included. Impossible to resist.
The school's top beauty doing sit-ups in underwear—who could not look? Her jiggling breasts with every lift. Twenty guys' hearts jiggled in sync.
This job? Self-control test tougher than fitness.