Chapter 9
“All right, from here on, we’ll conduct a proper examination. Class president, could you come up here and help me?”
At the school nurse’s words, every gaze in the classroom turned toward me.
I stepped forward as though I’d been waiting for this.
As I made my way through the women and stepped behind the curtain, the school nurse looked slightly surprised.
“Oh my, you’re the class president, Sihyeok?”
“Yes, I’m the class president.”
I couldn’t pass up the chance to legally fondle the bodies of more than twenty beautiful women.
“This is the first time I’ve seen a man serve as class president. Men usually dislike touching women’s bodies.”
The school nurse looked me over with interest before explaining my role.
She added that, as the only man, I would be examined last, after all the women had finished.
It was a considerate measure to ensure that the women wouldn’t see me naked.
“All right, the person standing at the front can come in first.”
At the nurse’s words, Chaerin opened the curtain and came in. She had already stripped completely and was naked.
Her snow-white skin and the clearly defined curves of her body.
It was the body I’d thoroughly touched yesterday, but seeing it under such bright lights felt different.
Perhaps conscious of my gaze, Chaerin’s face flushed slightly.
Then, following the school nurse’s instructions, she stood at attention.
The full evaluation began.
“Hmm, her skin quality is top-notch. Good elasticity, and an even complexion, too.”
The school nurse lightly pinched the skin on Chaerin’s forearm with a special device and checked the readings as she muttered.
I quietly watched Chaerin’s body from beside her.
Next came the breast evaluation. The school nurse brought over a mold.
“Breast volume: F cup. The shape is excellent, too.”
The mold fit snugly around Chaerin’s ample breasts. The number ‘75F’ appeared clearly on the monitor.
Next came the nipples and areolas. The nurse took out a vernier caliper and clamped Chaerin’s nipple between its jaws as she muttered.
“The areola diameter and nipple projection are in perfect proportion.”
I swallowed hard. I was impressed by the precision down to the millimeter, but it also felt strange that the subject was my twin younger sister.
The nurse took out what she called a nipple color chart. It listed dozens of subtle shades of pink and brown. She held it against Chaerin’s areolas and nipples to determine their color.
“The color is light pink, too. Nothing to criticize.”
At those words, I saw Chaerin’s nipples grow slightly stiffer.
She seemed embarrassed yet aroused by having her body evaluated in front of her older twin brother. The school nurse didn’t miss it and teased her mischievously.
“Oh my, are you already aroused?”
“Ah, n-no!”
Chaerin hurriedly denied it, but her erect nipples didn’t lie.
The school nurse then instructed Chaerin to spread her legs and lie down on the bed beside her. It was time to evaluate her external genitals.
“All right, spread your legs a little wider.”
Chaerin hesitated before spreading her legs. Her neatly formed pussy came into view between them.
The school nurse adjusted the angle of the light and examined their shape and color.
“The labia minora are symmetrical, and the color is excellent. The clitoral exposure is just right, too.”
She told Chaerin to turn over, then gently spread her buttocks and examined her anus.
“The density and color of the anal folds are both good. There’s almost no discoloration.”
The school nurse handed Chaerin a small medicine jar and said,
“If you apply this to your nipples, pussy, and anus after showering every day, you’ll be able to maintain their pretty color just as they are now.”
So that was why the women of this world had such beautiful bodies without any discoloration.
As I watched the lewd scene, I thought the other women must all have pretty pussy colors, too.
The examinations of her oral structure and physical flexibility were completed as well. Every part of Chaerin’s body received the highest possible rating. Only the final stage remained.
“Now we’ll begin the arousal induction procedure. Sihyeok, come over here and help me.”
At last, it was my turn.
“First, we’ll measure the time it takes her to become aroused. Once Sihyeok begins caressing her, we’ll measure the time in seconds until she reaches an aroused state.”
The school nurse handed me what she called a vaginal photoplethysmograph. It was a long, thimble-shaped device that fit over a finger.
“It’s a vaginal photoplethysmograph. Put it on and touch her pussy, and it can measure her arousal level and various other factors.”
With the strange device fitted over my index finger, I approached Chaerin, who was lying down with her legs slightly spread.
“S-Sihyeok….”
Chaerin called my name in a tense voice. Her eyes showed that she had never imagined her twin older brother would finger her pussy.
Watching the two of us, the school nurse wore an intrigued expression. She had been checking items off on a sheet about Chaerin, and now she smiled and made a request.
“First, could you touch Chaerin’s nipples? Some women occasionally can’t feel pleasure through their nipples.”
I stepped in front of Chaerin and supported her F-cup breasts with both hands. They felt heavy and soft, filling my palms.
Unable to resist, I gently rolled one of her stiffly erect nipples with my thumb.
“Hngh…!”
Chaerin’s body trembled faintly. I was just as aroused as she was, my heart pounding in my chest.
“There’s nothing wrong with her nipples. Now, could you touch her pussy?”
It was the first time in my life I was going to touch a woman’s private parts. I’d seen them hundreds of times in porn, but what would the real thing feel like?
I swallowed hard and slowly lowered the finger fitted with the device.
When I looked down, I saw Chaerin’s pussy. Her thick, swollen labia majora and the shy pink flesh peeking out between them made my cock spring fully erect.
With trembling fingers, I carefully parted her labia. Glimmering mucous membrane and a clear liquid appeared beneath them.
This must be vaginal lubrication.
As if entranced, I gently rubbed the entrance with my fingertip. Through the device, I felt something slick, hot, and sticky.
I marveled at the vivid stimulation, incomparable to anything I’d imagined. The sticky lubrication coating my fingertip glimmered under the lights.
Then I slowly inserted my index finger into the narrow-looking hole.
-Squelch….
Chaerin’s pussy, already thoroughly aroused, swallowed my finger without much resistance.
“Ah, ngh….”
A short moan burst from Chaerin’s lips. At the same time, the monitor beeped, and its readings rapidly climbed.
“Oh….”
I couldn’t help exclaiming even though I’d only inserted one finger. I could already feel that my cock was drenched in precum. How good would it feel to put my actual cock in there?
“Oh my, it’s already almost at the maximum reading. I don’t think we can measure the time it takes her to become aroused.”
The school nurse spoke in amazement.
“We can’t conduct the examination properly like this. I suppose Miss Chaerin will have to be retested later.”
Apparently, Chaerin’s pussy was just too easily stimulated—she had become aroused in an instant.
Thinking the pussy examination was over, I reluctantly pulled my finger out. Fortunately, there were still more items to evaluate.
“Then let’s start with the quality of her vaginal lubrication. We’ll measure the amount, viscosity, acidity, and scent. Could you insert your finger again?”
When the finger wearing the device touched her tightly clenched entrance, Chaerin held her breath. When only two joints of my finger entered, she twisted her waist and panted out hot breaths.
“Hoo, hngh, h…!”
I continued moving my finger without stopping.
As I tickled her soft inner walls, lubrication flowed out in a gush. The device on my finger analyzed its components in real time and displayed them on the monitor.
I heard the school nurse’s voice, full of admiration. Without stopping the caress, I curled my finger.
-Squish!
“Ah, there, hngh…!”
Chaerin’s waist jerked and arched. The machine continued gathering data without pause, but I no longer had any attention to spare for it.
“Now we’ll check her maximum vaginal pressure, contraction pattern, changes in internal temperature, and the degree of G-spot protrusion. Just keep moving your finger as you have been.”
Following the school nurse’s instructions, I began exploring the inside in earnest.
When I curled my finger and gently rubbed along the inner wall, a cry of pleasure burst from Chaerin’s lips.
“H-hey, heyyy… it’s coming…!”
I felt a soft, swollen area protruding beneath my fingertip. It was her G-spot.
I stimulated it relentlessly. Chaerin’s pussy then contracted violently, squeezing my finger.
“W-wait… I think I’m going to come…!”
Chaerin pleaded with me, but I didn’t stop. In less than a minute, her body suddenly went rigid.
“Stop, wait, stop, sto—! Hngh, ah, I’m coming, I really am…!”
“It’s fine, Sihyeok. Keep going.”
“You heard her, Chaerin. She says it’s okay for you to come.”
“You idiot, you idiooot, huaaahhh!”
With a splashing sound, an enormous amount of fluid spurted out. Chaerin’s legs trembled like aspen leaves.
“Her orgasm threshold is normal, with eleven contractions at climax. The amount of lubrication is ample, too… Everything is normal.”
The school nurse calmly finished evaluating her climax response.
I wondered whether Chaerin had climaxed too quickly, but according to the nurse, she was normal.
Chaerin, still unable to regain her senses and panting heavily, rested for a while before leaving through the curtain.
“Next, Miss Cha Ayoung.”
The next person to enter was Cha Ayoung, the vice class president. Her posture was unruffled and her face expressionless. She didn’t seem the least bit hesitant.
She had clearly taken perfect care of herself, with not a trace of excess fat on her body. If Chaerin’s body felt voluptuous and soft, Ayoung’s felt voluptuous and sleek.
Her breasts were somewhat larger than Chaerin’s, and her narrow waist flowed into hips with almost bursting volume.
Seeing her cool attitude, I thought,
Could she really not feel my caresses?
The measurement of her aesthetic index ended in an instant. As expected, her body also received the highest possible rating, just like Chaerin’s.
Now it was time for the arousal induction procedure. I fitted a new device over my finger and approached her.
“I’ll begin.”
I deliberately gave her a slight smile as I spoke. Most of the women so far had been unable to keep their heads after realizing I was a man, but Cha Ayoung was different. Her face remained expressionless.
I lightly touched her nipple, but there was no unusual reaction.
So, without bothering to say anything else, I brought the finger wearing the device to her pussy. Unlike Chaerin’s, it was still dry.
-Squelch.
That was the moment.
“Hngh?!”
The moment my finger entered, a moan escaped Ayoung’s lips, which had been as cold as ice.
Her body trembled as though convulsing, and she climaxed while lubrication dribbled out before my finger had even gone all the way in.