FSE

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A small black polecat hummed as he strolled down the corridor of his laboratory, blue eyes busily scanning a report containing the latest results for one of his test subjects. One hand was in the pocket of a knee-length lab coat, the only article of clothing he chose to wear, while the other clutched his tablet while he walked.

To either side, large display windows looked into open laboratory rooms, a number of which featured clear-walled observation chambers in the middle. Most of the chambers were built with comfort in mind, serving as living quarters rather than prison cells, despite being locked for security reasons.

Russet was doing his usual rounds, and his next stop was a rather unique spotted hyena. His often-subdued behavior and personality had earned him the nickname "Shy." But what had captured Russet's interest was the hyena's ability to transform on command. Though it sometimes took a few attempts, Shy would inevitably shift into anything that was requested of him. Russet had been studying him for years to better understand how this was accomplished.

The polecat lifted his access card to the scanner without looking when he approached the door to Shy's laboratory space. His eyes were still buried in the report, and it wasn't until he stopped at the edge of the hyena's observation room that he noticed something was missing. Specifically: the hyena.

Russet looked around the small living space in confusion. There wasn't anywhere for Shy to hide inside, as the rooms were designed to observe all aspects of a subject's activities and habits. All four walls were made of transparent safety glass. The only furniture in the room was a bed and a stand for the TV, as well as a toilet, shower, and sink. And the only way in or out of the room was a clear glass door with a badge scanner.

"Where did he get off to?" the small polecat asked himself. He wasn't overly concerned, as Shy wasn't especially dangerous, but he preferred knowing where his subjects were at all times.

Making his way out of the lab, Russet peered up and down the corridor. It didn't take long to spot a door that was mostly ajar, and he could see a distinct shadow of a tall figure cast across the floor. If it was Shy, he wasn't being very covert about his escape. And of all places, he'd chosen a storage and supply room to hide. Well, at least he hadn't gone far.

As soon as Russet approached the open door and leaned his head around to investigate, a thick loop of gold and red silk ribbon wrapped the small polecat and pulled him inside the room like a lasso. He made a startled "Dook!" when he was lifted clean off the floor, dropping his tablet in the process and wiggling about. The polecat's noises were swiftly silenced when another loop was drawn around his muzzle to clamp it, followed by several more around his shoulders to pin his arms to his sides.

Blushing despite his situation, the polecat's blue eyes peered up at his spotted captor. Shy was beaming at his accomplishment, short tail wagging as he proceeded to wind the festive ribbon around Russet's body, drawing it tight before making another loop down his slender frame. The hyena was being uncharacteristically forward, but it wasn't the first time. There had been a few instances of Shy coming out of his shell as a result of being pent up. Being monitored and observed on a near-constant basis meant there weren't many opportunities to relieve himself in private.

It wasn't the only reason he'd gotten the drop on Russet, however. He'd been invited to do so. It was a standing agreement that if he should ever escape somehow, Shy was encouraged to try and sneak up on the polecat and give him a good time as his reward.

If nothing else, it was another aspect of the hyena's mannerisms for Russet to record. He didn't fight as the ribbon continued to wind down his arms until his entire upper body was cocooned in brightly-colored loops, fed from a large spool that was often used for restraint rather than gift wrap. The silk bands pressed against the polecat's body, compressing his arms as each loop was drawn taut against him. When Shy reached his waist, he grabbed the bottom of Russet's lab coat and pulled it upward, securing it in place with more ribbon to leave the polecat's rump and fuzzy tail exposed.

Shy didn't stop there. He intended to fully cocoon Russet, passing over his hips and winding the ribbon up and down his legs several times, pinning them together and further restricting movement. Everything was drawn tight before the hyena doubled back, once again leaving Russet's butt and hips exposed as his torso received several more passes. The thick material then came over the top of his head, pinning back the polecat's small ears before another loop wound around his snout. Shy continued doing so until there was only a narrow gap in the ribbon for Russet to peer through, then paused to admire his handiwork.

Russet's black fur was now almost-entirely concealed beneath silk ribbon like a festive mummy. The silk loops hugged his body conformingly, squeezing down on him and rubbing over his soft fur whenever he moved. His arms and legs were completely restrained, with only his hips and tail free to wiggle about. He could only manage muffled noises through the ribbons, at best.

"Gotcha," the hyena proudly announced.

When he was lifted to Shy's grinning face so the hyena could peck his muzzle, Russet's cheeks warmed at what would inevitably occur as a result of their agreement. Barely half his size, the polecat's bound feet were hanging near the hyena's lap, and he could feel a warm package brushing against them. Deliberately, even. Shy lightly rocked, grinding his sheath across the silky ribbons covering his paws.

"We're long overdue for a bit of fun, I think," Shy said with a chuckle.

Russet managed half a nod beneath the bindings before another slow roll drew his gaze downward. Shy was already beginning to slip free of his sheath, the tip of his shaft poking the underside of Russet's feet. He let out a hushed growl, arms tightening around the polecat's waist to squeeze him against his chest. When Shy noticed the polecat's blue eyes looking down, however, he paused, and his cheeks flushed brightly.

"H-hey, no peeking," he warned, a bit of his timid nature coming back to the surface.

To guarantee this, Shy grabbed the loose end of the ribbon and looped it up over the polecat's head, then wrapped it around his grey facial mask several times to hide his eyes. Russet squirmed against the hyena's chest as his vision was darkened, forcing his mind to focus on the other senses his body was experiencing. The persistent tension of a silk wrap on his entire body was the most prominent of these.

When Shy's grinding resumed, he could feel the hyena steadily growing harder against him. Even though the layers of silk, the shape and heat were unmistakable. And though his ears were pinned down against his head, he could hear muffled groaning as the hyena worked himself up. A heavy muzzle came to rest on top of Russet's head as Shy's arms tightened around his waist, letting him better hear the pleased noises.

Before long, the possessive embrace relaxed, and Russet felt himself dipping. The stiff cock rolled up the front of his shins, forcing a crease between his legs as Shy lowered him. When his length ended up at the polecat's thighs, he paused to rock into the silky hammock, the tip of his cock brushing teasingly against Russet's own crotch. At the moment, there was only soft fuzz where the polecat's genitals would be. The unusual black gel that made up Russet's body allowed him to form or conceal them as-needed, and in most casual situations, he tended to present himself without.

With the hyena's comparatively-large, stiff erection pressed against him, it was becoming anything but casual, and a quivering black mass began to emerge between the polecat's thighs. A pair of fuzzy black balls formed, and a twitching cock began to expand upward. It was dwarfed by Shy's own rigid length, which promptly sandwiched the polecat's cock against his silk-clad belly when he noticed it. The sensation of warm flesh against his own made Russet squirm, trying to match the hyena's grinding as best he could.

Their mutual exchange only lasted a few moments before Russet was turned in the air, then pulled close to Shy's body again, this time facing away from him. The hyena's stiff erection founds its way between Russet's fuzzy cheeks, then slow grinding resumed to work it down into the warm crease. A low growl could be heard as Shy's hips worked against him, his thick tip nestling beneath the polecat's bushy tail and giving him a poke that made Russet shiver. The hyena was already dripping with anticipation, smearing slick pre into Russet's fur as well as his warm bud.

Though it seemed an impossible task for the tall hyena to fit into such a diminutive polecat, both knew Russet could comfortably handle his length due to his gel body. Shy's arms tightened around his waist to hold him in place as he rolled his hips - the restrictive ribbons constricting against Russet - pushing against the warm ring until it parted and let him begin easing in. A sharp groan filled the small storage room, accompanied by the soft _shlrrk_of Shy's cock finding its way inside Russet.

The weight of Shy's muzzle came to rest on top of the polecat's head while he slowly fed his length into Russet's smooth passage, hunched over his small partner. The thickness spreading him open elicited muffled whining, further fueling the hyena's needs by clenching around his cock. Worked up as he was, it was all the encouragement Shy needed to shove himself the rest of the way in, only halted by the soft smack of Russet's hips against his lap.

"Ohhh, that feels really nice," Shy groaned to him, grinding against the polecat's butt and rubbing a hand over Russet's belly when he noticed the shape of his cock making an impression.

One arm moved up to hold Russet by the chest while the other wandered lower, following the shape of Shy's shaft beneath the surface until his hand came to rest on top of the polecat's erection. Delicately curling his fingers around it, Russet gasped into his ribbon cocoon. His hips shifted against Shy while he pulled Russet up, drawing back several inches of his shaft before easing it inside again, using the leverage to push Russet's cock through his fingers. He ran his thumb over the tip of the polecat's cock while making another slow hump, smearing a bit of slickness into Russet's inner walls.

Though he'd initially been taking it easy, after a few gentle thrusts the hyena's pace picked up. He pulled away farther at each turn, starting with half-strokes, but soon he was nearly pulling himself completely out before plunging the thick length back into Russet's body. The deep thrusts caused the polecat to arch against him, twisting in his bindings and moaning each time Shy shoved into him. He could feel the hyena's cock pushing against his depths, jolts of exquisite pleasure washing over him.

Shy tightened his grip on the polecat's length, forming a slick sleeve with his fingers as warm fluids trickled up from Russet's cock. The hyena was continuously applying his own pre with each thrust, allowing his cock to smoothly glide in and out of the small polecat while filling the room with lewd, wet noises.

The steady rhythm of Shy's humping was effective in working his partner up, Russet's body flexing around the thick shaft each time he buried it. The polecat knew he wouldn't be able to hold out long at this pace, and the frequent, husky groans in his ears hinted that Shy was getting close as well. Russet's back arched again, grinding Shy's cock firmly along the silky-smooth anal walls and driving the hyena into a frenzy. His hips began to piston rapidly, clutching Russet tightly against his chest while the other hand shamelessly fondled his length.

The abrupt increase in passion caused Russet to muffledly whimper into his silky cocoon, rapidly approaching his tipping point. His body was trembling, cock twitching in the hyena's fingers, and each needy thrust brought him closer to an intense peak as a result. When Shy bent over him, the new angle caused the tip of his cock to push against the inside of Russet's belly, making a subtle swell against the ribbons when he hilted himself in his small partner.

Everything became a haze of stimulating sensations as Russet was pushed over the edge. His cock jumped in Shy's fingers and a squeaky "Dook!" could be heard as he began to spurt onto the silky fabric covering his belly. But the hyena's frenzied humps didn't stop due to his own climax. Shy continued thrusting right through it, the resulting tension on his cock guaranteeing he was close behind. His shaft was pulsing with bottled-up tension, and as he drilled the polecat with a feral-like drive, he let out a deep growl.

The eruption that resulted was nothing short of impressive. With a thick throb, a heated gush spilled into the polecat's depths, coating his walls in sticky hyena cum. Shy made several rapid thrusts to draw out the intense pleasure, panting heavily and whining to Russet as his length pumped a bottled load into him. Eventually the hyena's hips came to a halt, firmly shoving against the polecat's now-sticky cheeks and holding him against his lap as the gooey flow continued. Russet's own emissions had tapered off, now trickling lazily down his shaft and further coating Shy's fingers.

As the heated moment began to wane, Shy panted quietly between the polecat's ears, chin resting on top of his head still. He leaned heavily against a counter, knees trembling and threatening to buckle beneath him from the much-needed orgasm. His tension was melting away, replaced by the warm tingle of afterglow that Russet was also experiencing. Every touch, movement, and caress were amplified by the post-climax experience. And it made the sensation of silk ribbons on Russet's body a delightfully-tactile experience.

"Hff, wow...g-guess I really needed that," Shy cooed, relaxing his tight embrace on the polecat's chest and tipping his muzzle to give a light peck. Though he was still buried in Russet's rump, a bit of his characteristic shyness was beginning to creep back to the surface. "S-seems like you did, too."

Shifting lightly against the hyena, Russet nodded as much as the ribbons would allow. He didn't deny enjoying their little trysts, encouraging the hyena's behavior with their agreements. He relaxed against Shy and let the hyena cradle him for a short while, basking in the warmth as they wound down.

As much as he would have liked to linger, however, now that Shy had satisfied his own urges, it was time to put the hyena away and get back to work. He didn't initially notice Russet's mass shifting beneath the ribbons. The polecat's dark fur melted into his body until the surface was a uniform black sheen, even his spent cock disappearing beneath the surface of his gel body.

Still gripping Shy's own spent length, the polecat's dark rump began to spread and expand into the hyena's lap. Black tendrils crept around his hips and thighs, while the ribbons hugging Russet's head began to relax and unwind due to his changing shape. It wasn't until his hips were almost completely surrounded in inky black goo that Shy realized something was up, but only because the silky ribbons that had been wrapped around Russet's body were beginning to drape over his arms.

Peering down, Shy was surprised at what he saw. No longer cocooned in ribbons, Russet's dark body was beginning to creep over his thighs and belly. The red-gold ribbon was little more than a bundle in his arms now. Blushing, Shy released the wad of silk and reached down, trying to extract himself from the quivering tendrils creeping up his waist. Russet responded by sending out a pair of inky hands, snatching the hyena's wrists and pulling them down to his sides before they were similarly piled over with dark gel.

"H-hey, this isn't fair," Shy protested. "I-if you could d-do this the whole time, w-why now? He was sounding increasingly nervous as his confidence bled away, rapidly reverting back to his usual self.

As the dark goo continued to blanket the hyena's body from his chest to his knees, a dark blob rose up and began to shape itself into a black hyena torso, standing up from Shy's waist as if they were connected at the hips.

The dark lips pulled back into a grin, and soon a pair of blue eyes were glimmering mischievously at him. "Well, I wanted to let you have some fun. That was the agreement, right?"

"Y-yeah, I...I guess so," Shy stammered, cheeks getting warmer. He wiggled as the black mass tightened against his body, still sensitive from their sexual encounter.

"And now that you've worked off all that pent up energy, I think you know what comes next."

"D-do I have to?" Shy quietly whined.

Russet nodded to him, rising up while his lower "body" squeezed the hyena. He gave Shy a soft peck on the nose, then twisted around his chest so that his upper body was behind him. Leaning toward the hyena's ear, he made a soft dook. "You've had your fun. But it's time for more science. Shy, turn into a lab rat for me so we can put you back where you belong."

The hyena made another whine and slumped beneath Russet's weight as those words were spoken to him. His body involuntarily flinched, and he tried to fight back the inevitable.

"R-Russet, c-c'mon," he murmured, still wiggling even though it was impossible to free himself from the sticky gel clinging to his body.

"Don't fight it, Shy. Turn into a lab rat," Russet repeated, a bit more firmness in his voice.

Whimpering timidly, Shy hunched over as another spasm rippled through his body. His muscles quivered as he slumped, already losing several inches of his tall figure as a result of the command. Round ears began to enlarge behind his head, the hyena's canid muzzle thickening as his face took on a more tapered shape fitting of a rodent.

"That's it. Keep going, Shy. Don't stop shifting until you're just a little rat."

The hyena's hands and paws began to lose their fuzzy texture, growing pink and bare, while Shy's hips thickened and filled out. His short, brushy tail began to lengthen considerably, fur sticking down until it was little more than a long, bare pink taper. He continued to dwindle in size as the involuntary transformation fully took hold, quickly shrinking down until the black mass of Russet's body was resting on the floor with Shy's upper-body sticking out.

As his body continued to compress on itself, Shy's arms and legs gradually shortened, pulling closer to his body and forcing him to double over until he was resting on all-fours, no longer able to maintain his bipedal posture. He was already less than half his original height, and didn't stop shrinking until he was barely a foot long from his nose to rump.

Satisfied that he wouldn't be getting away now, Russet extracted himself from the hyena-turned-rat, fully forming himself into a tall hyena just to add insult to injury. He bent down and scooped a hand beneath the small, tawny-spotted rat, the other grabbing his scruff and gently lifting him from the floor. Shy was still blushing as he was brought to eye-level with the grinning hyena.

"That's better. Let's get back to work, hmm?"

Shy reluctantly nodded as he was cradled in Russet's hand. As the black hyena turned toward the door, he spotted something familiar on the floor. Bending down, he chuckled when he recognized a security card. So that's how Shy had escaped. He wasn't sure how he'd gotten ahold of it, but he'd have to keep a closer eye on them in the future.

Or perhaps he'd "accidentally" leave one inside his observation room, grinning to himself as he stepped out of the storage closet, picked up his discarded tablet, then strolled in the direction of Shy's lab so he could resume testing...