Pregnancy Clinic with Yu Sieun

The number of people waiting in front of us dwindled one by one. We'd made an appointment, but since it was the afternoon slot the wait was a little longer than usual.

"Number 205~"

"Number 206~"

I was staring blankly at the people entering the examination room when—

Huh?

The couple announced as number 206 rose from their seats.

Min Chaeseul?

Yet the direction Min Chaeseul and her husband headed was not the examination room but somewhere else entirely.

Where are they going?

Maybe they had come for some kind of procedure rather than a simple consultation?

She hid the purpose of her visit.

As I stared at them intently, my eyes met Min Chaeseul's while she scanned her surroundings. She flinched in surprise for a moment, but soon offered an awkward smile and a slight nod in greeting. I nodded back.

Her attitude is definitely strange.

I wanted to see which room she entered, but she disappeared around a bend in the hallway and I could no longer follow. Still, damn—her rear view was lethal. From behind, her ass looked incredibly beautiful.

...Wait. Did she switch to an afternoon appointment to avoid us?

Since she always ran into us during the morning slots, she might have changed her booking starting today. Of course, it was also possible she had simply postponed it for another schedule.

...Let's drop it.

If she was trying to hide something, it would be rude to keep prying.

I should switch my own appointment back to morning.

That much consideration was easy enough.

"It's negative."

Of course it was. Whenever I slept with Seong Yua I kept the Azoospermia skill turned on.

"That's strange... The sperm quality is excellent and there are no issues on the wife's side either... Why isn't pregnancy occurring?"

"It seems the first stage of the pregnancy clinic had no effect."

"...I'm sorry. I wasn't any help at all."

Yu Sieun's expression grew somber.

"Cheer up, Doctor. We're the ones who can't conceive, so why do you look so down?"

"Haha......"

"It's still too early to lose heart. The second stage exists precisely for situations where the first stage fails, right?"

"That's true, the second stage......huh?"

Yu Sieun wore a puzzled frown.

"The second stage... is... um..."

Since the details of the second stage had not yet been implanted, she naturally wouldn't know. I launched the Modification App.

Pregnancy Clinic Stage Two consists of sexual practice sessions.

Sexual practice sessions are the process of learning proper sexual technique and accumulating experience through intercourse with Yu Sieun.

Because these are merely practice sessions and not true conception attempts, pregnancy will not occur.

"What is the second stage of the pregnancy clinic?"

"...Ah!"

Yu Sieun, who had been thinking hard, answered at last.

"Stage Two is... sexual intercourse practice!"

"Sexual intercourse practice... you mean sex?"

"Yes. You'll accumulate experience by practicing intercourse with me. Sexual relations between a married couple are extremely important, after all. Not to mention their relevance to conception."

"I see."

I glanced at Seong Yua. To an ordinary person's eyes the situation was utterly abnormal, yet she simply watched quietly from the corner. She even provided appropriate cover when needed. The role of 'assistant' had been something I casually invented, but she truly suited it perfectly.

"Right, then. Let's begin at once."

Yu Sieun quickly shed her white coat. Having failed to help during Stage One, she seemed determined to give her all this time.

"You look confident."

"Of course. I am an OB/GYN specialist. While I might be less familiar with pseudo-sexual acts like Stage One, intercourse is my area of expertise."

In other words, she'd learned about sex from books. It was rather cute how confidently a virgin could declare such a thing.

Yu Sieun and I stripped and climbed onto the examination bed. She spread her own pussy and showed it to me.

"You see? This is the urethra, and the small opening below it is the vagina. The penis is inserted here."

A middle-school-level sex education lecture had begun. While she talked, I picked up the item I had prepared in advance.

"Hm? What is that..."

"It's called love gel. I heard it's very effective when used during sex."

"Ah, that! Yes! It's excellent when the woman has difficulty producing sufficient lubrication!"

She seemed excited to show off her ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠knowledge.

"Let me have it! You squeeze it out like this..."

Yu Sieun slathered the gel thickly onto my still-soft cock.

"That's not quite how you use it..."

"Pardon?"

"Hand it over."

Her method wasn't entirely wrong. It was more common to apply it after an erection, but the basic usage was correct. Still, unlike Yu Sieun, I actually knew how to have proper sex. I knew the 'correct' way to use love gel.

"Turn your hips this way... Yes, like that."

"Uh... this, this is..."

Yu Sieun assumed a rear-entry position and pushed her ass toward me.

"Um... Mr. Kim Junyoung? This position is called doggy style. Since you need to build experience, it would be better to start with missionary and progress gradually... Hiiik?!"

I pressed the nozzle of the gel tube into her pussy and squeezed hard, flooding her insides.

"W-what are you doing?!"

Then I grabbed her ass with both hands and spread her cheeks wide. Her pussy hole opened along with them.

"W-wait! That's not how you use love gel..."

"Tighten your pussy."

"Excuse me?"

"Tighten your pussy!"

"What, I-I mean..."

"Squeeze! Clench that pussy!"

"Hngh...!"

Caught off guard, Yu Sieun instinctively tightened. Her pussy closed with a wet sound and spat the gel back out.

"Haa, aah...! It's going all the way inside...!"

"See? The gel reaches deep like this. That's the proper way to use it."

I activated the app and used a skill.

"Good. Now open your pussy... that's it. Tighten again!"

"Hngh, aah!"

Schlorp—

"Perfect. Now relax... then squeeze..."

Schlorp— Schlorp— Schlorp...

After a few minutes of pussy warm-up the aphrodisiac kicked in and the back of Yu Sieun's neck flushed crimson.

"Huh...? Something feels..."

"Let's start with foreplay."

"Pardon? Ah, forepl— eek?!"

I pushed my tongue into her pussy and stirred it around.

"Slurp, schlick..."

"U-ugh, aah... Why are you using your mouth there... hngh!"

"Mmm, slurp... Mmh, don't you like it?"

"It's weird! Foreplay is supposed to be done with fingers, not the tongue! That area is unsanitary!"

"Fingers? You'll regret saying that."

Only Sex Master applied to my tongue, but both Sex Master and Master's Touch enhanced my fingers. I slid two fingers into Yu Sieun's pussy. Having become a master of caress through Master's Touch, I located her G-spot the instant my fingers entered. With the love gel already inside there was no need to hold back. I immediately curled my fingers into hooks and attacked her G-spot mercilessly.

Squelch! Squelch! Squelch! Squelch! Squelch!

"...!"

Yu Sieun's arms gave out and her upper body collapsed onto the bed.

"Hngh, huuuaaah♡?!"

Her startled inner walls clung wetly to my fingers. Her hips twitched and began rising little by little. I didn't stop. My hand rose with her.

Squelch! Squelch! Squelch! Squelch!

"Hngh, ugh, haaah♡?! Hngh, s-stop♡ This is wrong♡ ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠This isn't right at all♡!"

Wrong? She had never even imagined a wave of pleasure this enormous. It must have felt alien and terrifying. What could a woman who had learned about intercourse solely from textbook diagrams possibly know?

She kept calling it 'intercourse' earlier.

This wasn't intercourse. This was sex.

Squelch! Squelch! Squelch! Squelch! Squelch!

Yu Sieun's ass shot upward as if launched toward the ceiling.

"Huu, huuooooh♡ I'm, I'm coming♡ Huoooooh♡!!"

Splurt, splurt.

Pussy juice sprayed out. The drug must have spread completely; every inch of Yu Sieun's skin above her breasts had turned a soft pink. The skills and items provided by the app were all overwhelmingly effective. Even the lower-grade Aphrodisiac Love Gel had reduced the usually icy Seong Yua to a whimpering mess. With the intermediate version now inside her, a woman who had only studied cross-sectional diagrams of copulation had to be losing her mind.

"Haa, hngh... haa, haah...!"

Yu Sieun lay face-down on the bed, panting. Her hips twitched intermittently.

...This is pretty hot too.

It had been a long time since I'd seen a woman this pure. The sight of such a girl getting her pussy fingered until she squirted helplessly was incredibly arousing. It stimulated a man's sense of corruption and conquest in the most delicious way.

At some point the roles had reversed. I was the one giving the lesson. She was receiving her very first real sex education.

Yu Sieun regained her senses, flipped herself over properly, and spread her legs. Then she opened her twitching, drooling pussy and showed it to me.

"N-now... I'll conduct the pregnancy clinic... practice session..."

Her eyes were already hazy with lust.

This is why innocent women are the most dangerous.

Her soaking pussy twitched and spat clear fluid.

"H-hurry... This is the vagina... It opens and closes, sticky... You see this hole...? This is where... the penis is inserted. Hurry...!"

Yu Sieun urged me on with language that was somehow both refined and vulgar. She was mistaken. The instructor for this practice session wasn't her—it was me.

I pointed at her pussy with my finger.

"What is this?"

"This... is my v-vagina. Here..."

"No. Repeat after me."

I slid a finger about one knuckle deep.

"Haa, haah♡"

"Pussy."

"Y-yes...?"

"Pussy."

"N-no... this is called the vagin—"

I curled ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠my finger.

"Huuuugh♡?!"

Yu Sieun's head snapped back. Her waist jerked forward violently.

"Pussy."

"P-pussy..."

I pulled my finger out. A thick silver strand connected her pussy to my digit. The elastic hole kept twitching. I pressed the tip of my finger firmly against her clit.

"Haa, hoook♡"

"Bean."

"B-bean! Bean...!"

"Cock."

"C-cock..."

"Sex."

"S...sex..."

As a reward I gently scraped her inner walls with my finger.

"Hoo, hooot♡ P-pussy, it's rubbing, rubbing...♡"

"Say it again."

"Hee, hngh...♡ Yes...?"

"What you asked me to do earlier. Say it again exactly as you learned it."

Only then did Yu Sieun understand. With moist eyes she spread her dripping pussy wide and spoke in a shy voice.

"P-please ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠put your cock in my pussy... and teach pregnancy sex to this OB/GYN doctor..."

Ah... sex-education roleplay... It was insanely hot.

I thrust my cock inside her immediately.

Squish—

"Huu, hngh, huuaaah♡"

The flared head scraped her distinct inner folds as it sank deeper. Even though she still had her hymen, my cock slid through her soaking pussy all the way to her cervix.

"Huk, ngh, haaaah..."

Yu Sieun was already so aroused that the pain of being deflowered didn't exist. I began thrusting steadily.

Schlick-schlick-schlick-schlick

"Haa, haa, ah, haaah...♡ Uuugh♡"

"Huu... How does the pussy-pounding lesson feel?"

"I-it feels good...♡ P-pussy pounding... feels so good...♡"

"Good. Repeat after me."

I pressed all the way in until our pubic bones met, then rolled my hips side to side, grinding the head of my cock against her cervix.

"Huu, haooooh♡"

"Cervix."

"R-rubbing, ru, rubbing rubbing♡ Ruuuub...♡"

"Cervix."

"Hee♡ Hook♡ Hee, heeeook...♡"

"Come on. Cervix."

"C-cervix, c-cervix, rubbing, ruuuub...♡"

"Good girl. Now here's a kiss as a reward. Upsie-daisy."

I lifted Yu Sieun's supine body and sat her facing me on my lap. Face-to-face cowgirl position.

"Kiss... mmph?"

"Slurp, slurp, mmm, schlick..."

Most people kissing for the first time tense up, stiffen their tongues, and even forget to breathe through their noses. But Yu Sieun's entire body had already melted from pleasure. Her tongue loosened like perfectly aged sashimi, and her nose drew in ragged breaths, pulling the scent of my saliva straight into her brain.

"Heup... mmm... ahbu..."

It seemed she liked her first kiss quite a lot; her eyelids drooped languidly. A model student whose mind had gone blank from her first kiss, tongue turning sloppy—seriously hot...

"Deup... rub the cervix... rub it..."

She also seemed to enjoy the way I pressed and swirled the head of my cock against her cervix. Still clinging tightly to me, she began rotating her own hips in circles, grinding her cervix against my glans. Wow, this was really fucking hot.

"Slurp... You like rubbing your cervix?"

"Y-yes... I like... cervix rubbing...♡"

"Then shall we try some cervix-pounding?"

"Cerv... mmm...?"

I grabbed her shoulders and pressed her down hard.

"Here we go—cervix pound~"

"Huu, huk, ngh, pound♡?!"

Yu Sieun's head whipped back.

"Hoot, pound?! Pound, pound...♡ I'm falling... falling... falling...!"

When pressure is applied to the internal organs, a dizzying floating sensation like riding a rollercoaster occurs. Afraid of the feeling of falling, Yu Sieun flailed her arms and legs while clinging to me.

"Here—pound, pound~"

Still gripping her shoulders, I bounced my ass off the bed.

"Hoot, pound, pound! Hoot♡ Pound♡ Ook, pound♡ Falling, fall, falling... hoot♡"

The sight of her struggling to breathe in torment was incredibly arousing. Let's call this... womb-knocking for now.

"D-die, dying, die, I'm dying.... pound, cervix, falling, I'm dying...♡"

Yu Sieun's eyes slowly rolled back. Her whole body began to tremble violently.