Extreme Temperature Difference
Creak—
The thick door slid open, and Dr. Cheon, having gathered all the necessary data, exited the underground lab. Haaaang♡♡♡ Cock, my cock's going crazyyy♡♡♡ Vulgar moans and screams echoed from beyond the closing door, but with her full hazmat suit on, they barely reached her ears. Just like on the way in, she had to go through the complex, rigorous decontamination process before she could finally return to her research lab.
The custom-made hazmat suit, designed to filter out all external substances and protect the user, had fulfilled its role and was now sent off for sterilization.
"Phew... I thought I was gonna suffocate."
No matter how much it was for safety, the suit offered zero consideration for the wearer—sweat beaded across her skin. As she swept back her bangs, the comfortable air of 22 degrees Celsius and 30% humidity welcomed her. Feeling the sweat cool rapidly, she adjusted her glasses. Then she opened her locker and slipped back into the lab coat she'd hung up earlier. The coat caught on her protruding chest over the brown sweater, but she brushed it off with familiar ease.
"Time to log the results..."
From entering the facility to every step of conducting the experiments, everything had to follow strictly controlled protocols. Fail to do so, and even she—the lead researcher—would face experiment suspension and a grueling "interview" with the facility management team. Because of all this hassle, most people visited only at the bare minimum frequency to check in person, but not Dr. Cheon. She came at the same time every day to monitor the 'subjects'' conditions and vitals, then compile the extracted data. Sure, she often delegated to her subordinates, but Dr. Cheon only trusted data she'd verified with her own eyes. A proper scientific attitude, perhaps—but the agents handling entry logs and procedures every time were dying of annoyance.
"Let's see..."
The chair creaked as Dr. Cheon settled her ample hips into it. It was a commemorative purchase when she'd become lead researcher, but the backrest was already wobbling ominously. Still, she balanced herself naturally, as if accustomed to it, and pulled up the data she'd checked earlier to start organizing it. Made of transparent reinforced carbon plastic, it allowed direct viewing while ultra-high-definition surveillance cameras in the room corners captured the subjects' every vivid detail.
"Hmm, still rebellious, both of them. But at least they're much more docile than at first. Good."
She murmured while looking at the photos on her tablet screen.
A redheaded beauty with a bob cut, limbs restrained, hooked up to a milking machine and semen extractor in the throes of forced orgasm. The kind of stunner who'd make anyone on the street do a double-take lay there with eyes rolled back, lost in ecstasy. Even the bucket placed to catch leaking semen was filled to the brim. To an ordinary person, it might look like some extreme BDSM play, but Dr. Cheon's expression remained serene—as casual as checking, "Oh, the culture I inoculated in the media last night grew nicely."
Breast milk flowing well, semen production steady with ejaculation volume gradually increasing—that was all she noted.
"This is successful enough. At this rate... it'll be plenty."
She jotted down the experimental and observational results in her research log with quick scratches of her pen, then swiped to the next photo.
This one showed a green-haired beauty with flowing locks, also restrained. Unlike the redhead, no milking machine, but fluid presumed to be breast milk leaked from one breast. Semen volume was a bit less than the first woman's. Still, filling the extractor to capacity meant it far exceeded normal human output by now. Not yet accustomed to the pleasure—or perhaps with a low threshold for it—her lower body was bound double, yet her hips bucked relentlessly through ejaculation.
"This one... still only one breast producing milk? I used the same stuff..."
Hmm, she flipped back to the previous photo, rubbing her chin in thought. Why the difference?
"Individual sensitivity to the drug varies, I guess. This one's gonna take a bit longer to optimize."
'Even among futanari, subjects show marked differences in drug specificity. Requires further ongoing observation and testing.'
Having reached her conclusion, she wrote fluidly in the log, adding the final line to wrap up the day's work.
Groaning softly, she stretched her stiff body after standing and sitting so long, then rose to head home. Tomorrow brought not just subject monitoring but a visit from 'above,' so there was plenty to prep in the morning.
"Yawn... If only they'd boost the budget."
Muttering a worry any ordinary researcher might have, she left the lab. And so ended the daily routine of the secret 'institution' researching futanari.
"Haa..."
Properly dressed, Yu-hyun checked the time in front of the subway station, shifting restlessly on her feet. Time had flown to February. It was the day she'd agreed to meet Seo-yoon. They'd meet outside first and grab food, so she waited a bit—and there was Seo-yoon waving from the station exit.
"Sorry, I missed the train right in front of me... You wait long?"
"Nah, I just got here too."
"Liar, your ears are freezing."
"Eek...!"
"Sorry for making you wait. My treat for dinner tonight."
Seo-yoon cupped her ears gently, whispering close. The androgynous voice right by her ear, teasingly rubbing both sides—Yu-hyun could only nod, unable to reply properly.
"Alright, let's go? You must be starving."
Today was just the two of them, no Mari. Yu-hyun's heart raced at the feeling of stealing Seo-yoon away. She'd reserved a popular spot with a waitlist, so they got right in. Sitting side by side, Seo-yoon's presence distracted her so much she barely tasted the food—did it go in her nose or mouth?
Watching Seo-yoon eat heartily, Yu-hyun felt like she was the only tense one, leaving her heart fluttering oddly. Annoyed, sad, expectant—all because only she couldn't calm down.
"Whoa, that was so good."
"Y-yeah... Haven't had food this tasty in ages. Haha..."
She hadn't really savored it amid the nerves, but matched Seo-yoon rubbing her full belly. Seo-yoon narrowed her eyes with a hum, then grabbed Yu-hyun's hand and led her out.
"Wh-where we going?"
"Where else? Shopping for essentials."
They ended up at a convenience store. Without letting go of Yu-hyun's hand, Seo-yoon grabbed a three-pack condom box, smirking.
"You were looking forward to this, right?"
"...!"
"It's been all over your face."
"R-really?!"
She jolted, touching her face—then realized the teasing and lightly punched Seo-yoon's arm.
"What'll it be? Quick coffee, or straight there?"
Their joined hands intertwined fingers warmly. Seo-yoon pulled her close, refusing to let go, locking eyes.
"Whatever Yu-hyun wants. That's why we met today."
"...Really?"
"Yeah. For real."
"...Then, straight there."
"Right now?"
"Yeah..."
Her face burned; she wanted to hide, but their firmly clasped hands wouldn't allow it. She grabbed them on purpose for this, she thought—but it didn't feel bad. The care, the warmth and subtle possessiveness felt good.
"I booked a room."
"For real? What if we hadn't gone straight?"
"...Just in case, I got an overnight stay. It's fine."
"Hmm, Yu-hyun. You wanted it that bad?"
"You...!"
"Hehe, kidding. Let's go."
Whispering in her ear, hand in hand. Yu-hyun couldn't hold back anymore, nodding and taking the lead. Thanks to the app reservation, they checked in at the kiosk and headed up. The moment the door closed, they shared a light kiss.
Seo-yoon led, as Yu-hyun squeezed her eyes shut in tension. Soft, gentle kisses—not forceful—to ease her nerves and reassure her.
"I don't smell, do I...?"
"Nah, not at all."
"Still wanna shower..."
"You first? Or me?"
"M-me first!"
Unable to just wait, she dashed to the bathroom, scrubbing thoroughly and meticulously—every crease and joint foamed up. Cracking the door, she peeked out.
"All done? Coming in?"
"Y-yeah... Hold on!"
In her bathrobe, she fiddled awkwardly, sitting on the bed's edge. Even after drying her hair, Seo-yoon was still showering. The pouring water sounded eternal, each second like a minute—until Seo-yoon emerged.
"Just gotta dry my hair."
"Take your time..."
The moment she'd imagined hit, her heart pounding so loud it rang in her ears. Hair dried, Seo-yoon grabbed the condoms and sat on the bed. Silently slipping off Yu-hyun's robe, she pulled her into an embrace. The open front let her large breasts press softly—tension easing a bit.
"C'mon, relax."
"H-how can I not...!"
Seo-yoon rolled on the condom and drew her in by the hands.
