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A Positive Response to Stimuli

SynTech Slushpile #18

By Danath

Characters © Roure

* * *

Day 1

Roure's paws clenched and his wrists pulled on the soft white restraints holding his arms up above his head. The chains connected to a large pole that dropped from the ceiling in the center of the laboratory, leaving the brown and tan canine little room to wiggle around the short pedestal that lifted him a foot or so off the floor. His naked hips twitched as he kept his large, fluffy tail curled over his rump cheeks. The canine's pelt featured bands of creamy tan from his muzzle down to between his thighs, while his body was covered in a rich medium brown. Patches of darker brown appeared as small ovals over his knees, elbows, and the broad top of his tail, as well as forming a pattern of intermixing colors in the large ruff of fur around his neck. His pelt stretched across his narrow, plump chest as he stared at the scientists wandering all around.

For not the first time, he wondered whether taking on the summer job as a "Laboratory Research Experiment Assistant" was really the right move. The application arrived by text one day out of the blue, and when he'd gone in for the interview, lured by the high salary, the half-dozen foxes who talked him through the experiments left him so flustered and horny that he found himself signing and agreeing to everything they presented him. Roure did have a weakness for vulpines, and this time, he thought, it was really catching up to him.

The lead scientist was a white-furred fox with long blonde braids that trailed down to his hips. He wore a pair of goggles and jeans under his lab coat, and was currently walking around the chained up canine taking notes on his electronic tablet while muttering to himself.

"Adjust for hip size... interstitial bone growth... advanced hyperization onset factors... carry the twelve..."

"Uh, Doctor Cai?" Roure asked.

The fox's head turned, a big smile flashing across his bright white fangs.

"Yes, my pretty little puppy?" the fox asked, stepping up onto the pedestal. Roure's tongue flopped out as the vulpine's claws stretched behind his large, floppy ear and scritched down to the skin. The canine's thighs squeezed together, one leg lifting off the ground as he twisted his wrists in the cuffs above again.

"Nnnggh... I was... huhfffhh... wondering when... mmhhh... you'll let me down?" Roure gasped, eyes closed shut tight as the fox's fingers teased around to his other ear. "Nnnggghhh..."

"Oh, don't worry about things like that for now," the fox murmured. The vulpine's long white tail flicked side to side in the air behind him with excitement as he tickled his claws down under the gasping canine's jaw. "We just need to take a few baseline measurements before we start."

"Start? Start what?" Roure gasped, head instinctively pressing towards the fox's claws as the other male pulled away.

"Oh, it was all explained very clearly at the interview," Cai said, teasing Roure's muzzle with the tip of his tail as he turned around. "Anyways, we'll be starting soon, puppy..."

None of the other scientists would talk to Roure as they prodded him with temperature sensors and other devices, even using calipers to measure his biceps and thighs and, embarrassingly, his sheath with preciseness. Eventually, the five foxes huddled around Cai, so that all Roure could see were a bunch of tails lifting above white lab coats: Cai's was the largest in white, with the rest in red, red and black, red and white, black, and one a shockingly bright hue of blue. Once in a while, a vulpine muzzle turned to grin at the smooth, cute canine hanging by his wrists in the center of the lab.

After a few more minutes of hushed conversation, a general waggle of tails and nods of pointed muzzles signalled the end of the meeting. Scattering to collect their equipment, the foxes regrouped in the center of the lab, surrounding the increasingly nervous Roure.

"Uh... what's that?" the dog asked, his thick pelt bushing up as Cai advanced holding a glowing green ampule connected to a large, flat white device.

"Subdermal injector. Might be slightly less efficient, but I couldn't bear to shave a single hair from your cute little body," the white fox said, blue eyes shining as he pressed the device to the side of the canine's neck. "There... now... places!"

The six foxes eyeballed Roure, who panted and grunted as a peculiar heat swept through his body. He wasn't particularly tall or wide, but his pelt stretched taut all the same as he leaned forward, elbows bent, head hanging down between his arms. His hips wiggled and a few small gasps and other noises made their way past the canine's trembling lips. Roure's eyes squeezed shut as the foxes stared, eyes wide, tails lifted, eyeballs glued to their test subject's figure.

"Nnnggghhh... feels... hot," Roure gasped. He blushed, glad his head was down, when he felt his maleness suddenly drop from his sheath and flex to full arousal in a matter of moments. He bit his lower lip, eyes closed as his cock beat against his lower belly, throbbingly hard, as hard as he could ever remember being.

"Interesting," one of the foxes said, jotting down notes on a pad he pulled from his lab coat. "Perhaps a reduction in the initializing agent."

"Growth rate within predicted range," another chimed in.

Cai's eyes narrowed and he stepped in close to the canine, whose head remained bowed, but out of shock rather than shame at this point. Roure's eyes fixed on his maleness, which was at least three or four inches longer and a few inches fatter around than it should have been. His tail twitched, and he stood up, craning his head to look over his shoulder at his rump, which was also larger. When he turned back to the fox in front of him, he felt the familiar claws return, but this time, to cup and cradle his full, sensitive cream-furred balls. Roure's eyes widened as Cai's smirk grew, and the fox's other fingers tickled down his length.

"The first test was a significant success," the fox said, his words mumbled somewhat as his muzzle slid through the deep tan fur on Roure's chest. "We'll review and prepare for tomorrow's session... later..."

The other foxes growled one after another, their voices sending thrills down Roure's spine as Cai's teeth snagged his nipple. He gasped and jerked against the restraints on his wrists as another fox's claws dug into his plump rear end, while a warm nose stuck between his thighs. The canine's eyes closed as he felt the half-dozen foxes groaning and moaning, cooing in his ears and whispering to him as their muzzles explored every inch of his body. His tail lifted as fingers teased, and his backside arched, shoving his hips forward, pushing his full arousal more firmly into the eager lips of a pair of foxes kneeling in front of him.

"Yes, my big, hung puppy," Cai groaned into his ear. The fox's claws scraped down Roure's chest, and the canine's nostrils flared as a few dribbles of pre-cum pumped from his tip. "Such a good boy... so big and soft..."

Wide tongues splayed along Roure's length, at least two, while a long and narrow muzzle went after his balls, rolling them side to side in the warm confines of a wet mouth. The canine's hips jerked, pelt fluffing in all directions as the fox behind him nibbled at his shoulders and sides. Roure's nostrils filled with their scent as they squeezed in around him, moaning and licking, caressing, teasing, until the dog's shaft twitched, a steady stream of clear pre pulsing across eager tongues. He didn't know how long he lasted, only that when he finally did cum, it was deep into the muzzle of the first fox to get there, much to the others' disappointment. The canine's fingers curled into his palms as he humped, gasping, moaning, encouraged by Cai's increasingly lewd words of praise.

"Yes... grow for us, puppy... get nice and big for your foxies..."

Another muzzle replaced the first, eagerly pulling and slurping down the warm, slick length of the canine's erection. The sensitive flesh jerked, erupting again minutes later, a second orgasm dragged from the moaning canine's willing body by the expert muzzle.

Cai's hips slid against Roure's belly and he opened his eyes, panting hard, chest heaving, as he watched the fox's tail lift up before smoothing his face in silky white fur. Plump cheeks enveloped his messy, spurting cock, hot dogging him until he was bucking, desperate, aching all over again. The white-furred vulpine grinned as his ears perked, catching every little gasp and moan as he angled the tip inwards and pushed back with a satisfied clench. As his body settled into place around the straining, whining canine, enveloping every inch of the dog's thick, satisfyingly hard maleness, Cai closed his eyes and panted.

"Mmmhhh... alright, fellas, let's make these tests count..."

* * *

Day 4

It was early morning. Roure's muzzle fell open as he snored, held upright by the chains connected to his wrists. The big canine barely woke when one of the foxes moved him from his small, clear-box sleeping unit back to the plinth. Between the fat-rumped canine's thighs, a thick pink maleness flopped to his knees, easily thicker than his wrist. It was too big for his sheath, which squeezed up permanently at the base. His full, round balls swung front and back as he snored, slender chest rising and falling rapidly. He was exhausted still, worn out from three solid days - and secretive nights - of pumping and humping each and every one of the foxes until his brain felt like it would melt. Roure's nostrils twitched as he dreamed, leg kicking a bit, the scent of the foxes teasing his unconscious mind.

One of the lab doors opened and a shadowy figure darted inside. As the figure moved into the light, revealing their bright white fur and long blonde braids, a glint of a neon green ampule shone in the subdermal injector in the fox's fingers.

He stepped up close to Cai, glanced over his shoulder to make sure he was alone, then pressed the injector directly to the base of the pipe-swinging femboy's thick cock. Dropping the empty device onto the floor, Cai dropped to his knees in front of the canine, furry paws already moving to grasp the sleeping male's shaft at the base. Roure's body twitched and his ears jerked as he sniffed, then blinked his eyes.

"Mmmhhhh, I know I shouldn't give you extra doses off schedule," Cai said, his narrow, nude shoulders trembling as he hefted the canine's thick pink log in his paws, pulling the huge tip towards his muzzle. "I just can't help myself around such a good cock like this... mmmmppphhhhh!"

The scientist's muzzle dove forward, slathering the tip in warm saliva as he stretched his jaws wide to accommodate the canine's thickness. The tip pulsed, soft but rapidly hardening as Roure's muzzle fell open. His sleep-dazed eyes blinked again as he tried to figure out whether this was a dream, and he was only imagining a sexy fox was hungrily slurping on his oversized dong.

When Cai's claws squeezed around the football-sized orbs dropping between his meaty, plump thighs, Roure's eyes snapped open. This most definitely wasn't a dream. The canine's hips swung forward as far as the wrist restraints would allow, grinding his maleness down the fox's throat. Cai shoved forward, eyes squeezed shut as he swallowed hard, both paws on his belly, nostrils twitching against the canine's crotch fuzz.

With a gurgle, Cai pulled himself off after a few minutes, though he had to push himself back roughly to get the thickness free of his throat. The huge length had swollen, hardening, fattening dramatically until it was stretching Cai's throat in all directions. The fat pole leaked constantly as well, especially after experiencing the vulpine's tight throat.

"Mmmhhh... oh, Roure... you're getting so big and juicy for us, Roure," Cai moaned, face disappearing into the massive tan balls.

Roure's eyes closed, tongue out, panting hard as he felt the fox's muzzle and claws tease and worship his length. The scientist was in the lab two, three times a day doing this, pumping him full of extra doses before teasing him and milking him. The canine couldn't help but love it, crave the attention from the hot little fox. He loved watching his meaty, fat pink cock flex across Cai's muzzle, hiding half the vulpine's face beneath the thickness, or grinding his hips against the white-furred hips until he shot a load of canine seed between Cai's shoulders. There were just so many fun things to do with the foxy scientists, Roure thought...

* * *

Day 7

"Weight has increased an additional forty percent since yesterday. Increasing dosages appears to have no unintended side effects."

"Hyperization array is holding..."

"Stable core temperature."

Roure licked his lips as he twisted his head around, glancing from one of the cute fox scientists to the next. He couldn't believe how sexy they looked and how good they felt on his heated, growing, swelling, chunky body. The canine was, however, a little perturbed. Even though his huge pink cock hung out from his hips half-hard, dancing above a pair of balls easily wider than his torso that stretched well past his knees, none of the hunky males were on their knees attempting to swallow his huge, dark red tip, which throbbed with pleasure even now in anticipation, while the rest of the light pink stalk bobbed up and down over his heavy nuts. Sure, there were plenty of lipstick marks on the tan fur of his massive sac, swollen and emitting a constant musky scent, and even more lipstick around the tip of his huge shaft, blending with the deep, angry red hue. Even completely soft, Roure's length drooled sticky pre-cum by the pint. All of that, as well as the sight of so many plump fox rumps draped in white lab coats, made the big canine really happy normally. But right now, at this moment in time, Roure was unhappy not to have some hot piece of foxy ass sliding against his meat.

The wait turned out to be worth it, though, as Cai and the rest approached, their slick and sly smiles as wide as ever as they advanced on the test subject, who wiggled and squirmed with even more anticipation.

"Experiment commencing," one fox said. "Our hot, huge puppy is prepared."

"Initiating a two-ex overdose of permanent hyperization serum."

"Monitoring internals..."

"Getting the hung pup internal... heh."

The last came from Cai, who couldn't help himself. As Rory's limbs trembled from the heat of the latest, super-sized dose, the white-furred fox's smooth hips ground against the tip of the canine's half-hard length. Pre ran down the vulpine's legs in dribbles as his tail spread across the top of the huge length, easily three feet long and thick enough that it looked too short, almost stubby, despite its preposterous size. The proportions made Cai grit his teeth as he felt his hips stretch, tail hole burning, until Roure's satisfied howl rang through the lab. It was a familiar call, one the oversized, thick-rumped femboy couldn't help but make whenever one of the fox's rode him. Cai's belly bulged and his fingers stroked down his own chest as he felt the canine's meat impale him, filling and stretching him until he was nearly hanging off the big male's hips. Considering Roure was a foot taller and three or four feet wider at the hips than when he'd started, there was plenty for Cai to hang from.

"Unnnnggggghhhh... he feels so good getting hard inside," Cai groaned, crooning as he clenched and squeezed. "That's it, puppy... fill your foxy..."

The canine's breath came in squeaks as he pumped his hips, shaking and shivering Cai side to side as the outline of the massive bulge squeezed outwards against his stomach. The other foxes watched with jealousy as they stroked Roure's shoulders and sides and thighs and rump, massaging his balls and nibbling on his body, filling his nostrils with their scent as the groaning, gurgling lead scientist did his best to brace his arms against the floor - when he could reach, at least.

The huge length surged to full, hard length, and Cai found himself pulled up and back, until his shoulders smacked into Roure's plump belly and smooth, soft pecs. The hyper-sized canine's cock jerked, visibly throbbing against Cai's belly as he drew up his knees and whined with need. Roure's head fell back as his hips lifted one last time, shifting Cai's body a few feet higher into the air. Waves of thick, pungent, everflowing white seed not only stuffed the fox's belly until it pushed his own raging arousal towards the floor, but squirted back around the flexing maleness, creating waterfalls of jizz that cascaded off the small plinth.

"Such a juicy boy..."

"Big and thick puppy..."

"You're so big and all for us..."

Tongues and teeth invaded Roure's ears, which twitched and flapped as he squirmed, gasping, cumming harder than ever as the heat intensified.

"Grow for us, puppy..."

"Such a monster cock..."

"That's a good, big boy... I bet you can't wait for those fat nuts to hit the floor, can you?"

Cai's belly distended further as the canine's cock visibly swelled. His length stretched forward as he howled, footpaws stamping into the plint and sending splatters of cum in all directions. The other five foxes squirmed against him, fondling his massive balls and teasing his pecs as he kept going. They also grabbed Cai, helping the shuddering, bloated white-furred fox grind on Roure's hugeness. The weight of his massive cock, now amplified, meant it was too heavy to stay upright, and the length fell forward from his chest, taking the gasping, bloated figure of Cai along with it. The fox ended up bouncing lightly off the floor, bloated belly spreading flat, each time gurgling as thick seed flowed up his throat and out of his muzzle and nostrils. The pungent blasts overwhelmed his body and made the rest of the fox scientists groan and whine with need all the more as they teased and thrust and toyed with the growing canine.

"He's so big... so fat..."

"The two-ex dose is holding!"

"Nnnggghhhh... yes, you big, sexy, puppy!"

Eventually, with Roure still panting and growling and humping, Cai's jizz-filled body simply slid off the enormous shaft as it swelled bigger yet. The tip erupted, dousing the prone male from the top of his head to his tail with gallons of seed a deviant, satisfied grin stretched across the fox's muzzle. Cai's ears perked as the canine, who had subsided into heavy panting, growled and roared again once the second fox lined up to test out the thick, newly grown maleness.

More worshipful foxes surrounded the cute dog's enormous balls, massaging them and kissing them, whispering and moaning all the while as the second fox took the oversized canine for a ride, much to Roure's intense pleasure.

"So musky..."

"He's such a big, gorgeous, hung puppy..."

"How could any fox resist such a big, growing cutie?"

The fox's hips ground down, his smooth belly inflating outwards as Roure's moans and whines filled the large laboratory. His curly tail wiggled and beat side to side as his plump, heavy balls rolled across several sets of paws, pumping gallons of thick, musky seed into the gasping, gurgling fox.

It was going to be a long day of testing, and retesting, and retesting again...

* * *

Day 14

"Fuck... I know I shouldn't," Cai muttered, eyes flicking to the oversized injector in his fingers. The naked fox stood in front of the hugely grown femboy, drinking in the sight of Roure's expanded hips, plump and overgrown rumpcheeks, his pudgy pecs and belly, and the enormous sheath draping from his lower belly. The canine's balls reached past his calves, and even bounced off the floor when Roure bent his knees at all. The huge length was easily thicker around than Cai's head, but that still didn't stop him from stretching his muzzle wide and licking his way up the tip.

"I just gotta know what it's like to feel this monster get hard..."

*CLICK FWHOOOOSH*

A rumbling, deep bass moan erupted from Roure's plumped up lips. The canine's eyes blinked open, then his muzzle spread into a happy grin when he saw Cai's muzzle distending around his shaft, at least four feet long and completely flaccid. Cai's chest and knees shoved into Roure's huge sac as he crouched on his feet beneath the massive stalk, letting gravity help do the work of stretching out his cheeks and throat. The massive canine's wide hips swung forward, though his relatively small, smooth upper body remained connected to the wrist restraints. His huge ball squeezed into Cai's body as the fox's ears went back and his tail flapped side to side with excitement.

Roure flexed his arms, though the layers of plush, deep fur and fat didn't allow much of it to show as the curvy, big-hipped, hugely hung femboy's cock forced Cai's throat to stretch even more. Soon, the fox was clutching at his own belly, massaging the still-soft head of the canine's thickness.

A pair of paws suddenly wrapped around the back of Cai's ears. His eyes flicked up to the canine, who was panting and moaning and growling, before pausing and holding a finger up to his muzzle in a shushing motion. Roure winked, then resumed thrusting, using his hands to take advantage of Cai's position as he ground himself in deeper. The shuddering jiggling mass of curvy canine flesh pumped a few more times before Cai's nostrils squeezed up against the plump femboy's lower belly. The scientist's hips lifted into the air, legs kicking uselessly below, as the canine leaned back, allowing his growing cock to expand inside the wriggling white-furred male. The large canine's hands kept a firm grasp on Cai's shoulders, keeping the narrow muzzle stretched around the base of his overgrown shaft, until the fox's whole body began to stretch and distort around the pole.

Roure's thrusting intensified as he approached full arousal. The huge cock, now easily several feet longer than Cai was tall, pumped and flooded the fox's body, distending his belly with great huge bulges every few seconds, until Roure's thighs trembled and his fingers curled against the fox's fur.

The canine really enjoyed these extra morning sessions, and as he rehooked the wrist manacles back to the pole, he wondered how long until the other five foxes arrived to give him all of their off-book doses as well...

* * *

Day 20

"Commence the operation. Careful... careful... don't slip, and ensure complete contact before disengaging..."

"Secure the back side! It's slipping!"

"Heave! Pull! It'll hold!"

*SNAP*

*JIGGLE*

"Yoga pants successfully applied!"

Roure's arms stretched to the sides, holding him in a T-pose as four of the foxes gently relaxed the stretching, straining fabric of the pale gray yoga pants that barely held together around the plump, massive canine's calves and thighs. The tight squeeze pulled his huge cocktip down against his nuts, which were also pulled up so that they wobbled and sloshed against his knees. The fabric turned nearly see through as individual brown and tan hairs poked through. The huge head of Roure's cock flexed outwards, the shaft bent in a gorgeous arch above the waistband, which could get no further than halfway over the canine's thick hips. His length was darker than before, a needy red shade that was most intense at the tip before fading to the original mild pink halfway down the monstrously huge cock. The fabric pulled tight enough to outline the individual veins powering the immense schlong stretching up from the root.

The canine blushed as the assembled foxes took pictures, documenting every little swell and stretch as his huge length shifted, pushing outwards before the fabric tucked his half-hard, curled over shaft back in. Roure panted, heat rising inside his belly and the root of his cock as he felt his arousal swell, and a few cups of thick, stick pre-cum gushed through the fabric where it strapped around the tip of his length. The heavy seed drizzled down the swell of his massive sac before puddling onto the plinth beneath. Roure's head fell forward, tongue out, as his tail wagged furiously side to side behind him.

"He's so pretty in those pants," one of the foxes said.

Roure moaned louder when he felt claws squeeze into his sides.

"Such a good puppy."

"Nice and thick for his foxes."

The massive length strained and stretched, filling out larger, harder, thicker as the groaning foxes focused less on recording what was happening and more on teasing the feminine, wide-hipped brown and tan canine into full arousal.

"Grow for us, puppy," Cai whispered into the canine's ears. The white fox's claws groped at one of the canine's pudgy pecs before pinching the nipple in his claws. "You're gonna love how big we make you..."

Roure's eyes closed as he felt the familiar rush of heat as several doses buzzed through his bloodstream, administered simultaneously by four of the foxes, including Cai. The white fox shifted his hips around, climbing and stretching his legs so that he sat with his hips squeezing down against the base of Roure's shaft, now fully pressed upwards past the waistband of his yoga pants. Cai's muzzle shoved between Roure's pecs as his lithe, narrow body curled around the canine's warm, plump belly, while his legs and knees ground down past the swollen base, which was thicker around than the fox's hips, to shove against against the oversized nuts. Roure's muzzle opened and long, low moans emerged as the flood of pre-cum pumping through the fabric sieve intensified, causing sprays to wetly slop against the floor in streaks. A few of the foxes took turns licking their way over the canine's swollen testicles as the thin fabric stretched ever tighter, compacting and squeezing the growing canine's rump cheeks and balls, until he was shivering and moaning.

Cai's eyes flashed as he felt the huge base throb against his hips, though the yoga pants somehow, miraculously, refused to break.

"Three more doses!" the white fox demanded, voice muffled as his tongue slathered one of Roure's nipples in saliva. "These Hyperion brand clothes won't stop our sexy puppy!"

"Grow bigger! Bigger!"

"Nnnggghhh... he smells so good..."

Roure's ears laid back as the heat intensified. His eyes rolled up into his head as he bucked his hips, almost tossing Cai off as the yoga pants strained and bounced. The huge shaft suddenly shoved down, straightening out along the leg, which where the seams finally gave out. The surprisingly tough yoga pants couldn't handle several feet of shaft grinding down towards the canine's ankle and split from the leg up to the hips. The fabric tore in a flash all the way down the other leg as Roure's plump, jostling cheeks sank out from the back. His huge cock flexed up, sending a streak of seed flying twenty feet before his massive shaft pointed straight up, trapping Cai between his curved, round belly and the hard, hot pole. A river of seed rolled down Roure's oversized cock as his huge sac flopped forward, smacking across the floor at the base of the plinth, knocking over and completely covering the blue furred fox beneath it, until only his paws wiggled from under the dense, musky, furry sac.

"Final elasticity measurement obtained! Well past expectations!"

"Arousal still only at 60 percent... we'll need to test again!"

"More yoga pants for our fluffy big boy!"

* * *

Day 30

Roure's huge bulk shifted back and forth. His pecs, meaty and full like small breasts, wobbled atop his chunky belly as, behind him, his immense hips wiggled back and forth, side to side. Beneath the canine, the incredibly bloated body of one of the scientists, the red fox, stretched like a waterbed beneath the huge femboy. The titan's thick stalk flexed, dark red from the tip to the base, an angry and lustful color, as he pumped in and out of the small male's round body, trying to flood him with more and more of his unstoppably thick and productive canine seed. Roure's huge belly flattened across the small male's backside before settling in around the edges of his bloated belly, inflated several times his original width and still increasing in volume.

The red and black fox and the full-black fox leaned into either side of Roure's shoulders, their arousals pressing into his fur as they moaned and nibbled on his ears.

"Yes, such a big and juicy boy... the biggest... so cute and huge..."

"Make us so full... fill us all up!"

"His cuteness is off the charts!"

From between the canine's thighs, a third fox appeared, exhaling with a satisfied moan before diving back down between the canine's cheeks, helped along by the huge tail that thwapped down over top of him. Cai, in front of Roure, stood on shaky legs, hips pumping as he leaned into the big canine's muzzle. The oversized tongue made short work of the fox's maleness, teasing out a series of rapidfire orgasms as the white fox's knees wobbled above the bloated male beneath him.

Roure loved foxes.

Scattered around the group, a collection of empty subdermal injectors lay forgotten, every last dose in the lab currently surging through the horny eight-foot-tall femboy, whose hips were wider across than any of the foxes were tall. Roure's groans and grunts rang out as he dragged himself free from the fox underneath him, then stretched his paws down between his legs and dragged another out from between his swollen stomach and thick shaft.

A squirm, a yerf, and a satisfied splurt later, and the canine was well on his way to making his bed for the second time.

Cai's ears perked as he listened to the heavy moaning and groaning. He dropped back, gasping for breath, legs trembling. Turning his head to the side and noticing a spare tablet, he grabbed it and stabbed at the screen until he found what he was looking for: Supply and Ordering. Putting in the requests for the materials to continue making more of the very successful serum they'd demonstrated on the canine, Cai licked his lips, then paused, and started mumbling to himself.

"Dilution ratio... reduce and intensify... mix with the reactor agent... should increase potency by two hundred percent at least..."

The fox's tail wagged as he watched the second fox to be on the receiving end of the massively hung canine's love explosion. The huge tan balls spread across the floor, each plump orb swelling even larger by the moment as the canine's body and fur shifted, sometimes in opposite directions when he increased his pace on the backside of the gurgling, leaking fox beneath him.

The fox shivered, moaning as his arousal returned in full force, the scent of the canine's arousal searing into his brain, eyes locking onto the jiggling flesh, the cute muzzle, the eager humping...

This would definitely require an extension to study fully. Fortunately, Cai was quite good at handling large projects.

The end