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"Two Tails Are Smarter (Than One Dumb Human)"

by dolphinsanity

for FoxLightning on FurAffinity

Content note: all characters appearing in this story are adults over the age of 18. Sonic and Tails in particular are fan-imagined, grown-up variant characters.

Ryan the human belongs to FoxLightning. Sonic and Tails belong to Sega Corporation, and this is a work of fanfiction.

~~~~~~~

Ryan brought the cardboard shipping box inside his house and gently shook it. Sounded like something heavy. From the heft of how it scooted around... maybe shoes?

As he used his box-cutting knife to open it, he noticed it was addressed to him in frantically irregular all-caps writing, in black permanent marker, written directly on the box's taped-shut lid. It had no return address and no official shipping label or confirmed postage.

He guessed someone must've dropped him off a present... but who, and why?

He didn't really need another reason to procrastinate from studying right now. He had an online university test coming up that he had been dreading -- a math-heavy physics test on aerodynamics and related subjects. It was fun to think about in practical terms, but he always struggled to wrap his head around once it was converted to numbers and formulas.

Still... a gift was a gift. He'd at least take a peek.

He opened the lid to find two high-top athletic shoes in the box. Their fabric was red around the heel and ankle -- white elsewhere and with two white self-adhesive straps along the top, with some shiny golden-looking bits along either edge of each strap.

They... reminded him of shoes from the Sonic games. Had someone sent him Tails cosplay as a friendly gag? He would have to playfully interrogate his friends about this later.

The urge to procrastinate rose immediately at the sight of something associated with fond memories. It couldn't hurt if he took a minute to try them on, right? If he wore them with the camo shorts and black tee he currently had on, the shoes would stand out visually, but he kind of liked the thought of showing off some Tails swag.

Slipping his white-socked feet into them, he was surprised that they fit perfectly, enough that he could immediately get up and walk around in comfort, as if they were a broken-in pair of his very own. He did that for a short time, chuckling at how nice this gift was... before looking with dread at his computer again.

...Okay, no more stalling: he needed to do some last-minute cramming. Sitting on the bed again, he removed the shoes, which took effort. Although they fit him well, they felt a lot tighter when taking them off. He tugged the right shoe free with a mild but noticeable struggle. The left one seemed even more resistant, as if some sort of suction had formed that was keeping his foot inside.

He grumbled as he pulled it off, feeling the pressure on his ankle and foot as he rolled backward onto the bed and dropped the shoe. Spreading his arms and sighing, he wondered if they weren't such a great fit after all. He could try again later.

He went over to the computer, signed in, and grabbed his notes, taking a panicked look over them. It was all a haze of math, as usual. It might as well have been an unstudied foreign language.

Frowning, he looked at the time until the exam unlocked. Thirty-three minutes.

He glanced back to his bed, hopped out of his chair, and sprawled, setting an alarm for five minutes from start time. He expected to need every minute of the test's generous two hour window to even do decently, and he couldn't even concentrate enough to cram right now. He just needed to breathe and relax first... maybe the tiniest power nap.

His eyes lidded faster than he expected, his body becoming calm.

Some amount of time passed, but he lost the sense of how long it was as he fell asleep. Unusually for Ryan, he found himself dreaming immediately, in a scene that would immediately seem to be brought on by exam anxiety.

He was sitting naked on a pile of books in a wooden-floored library or... computer lab? Workshop? He could see foggy-looking piles of tools in one corner, a long computer desk in another... he really wasn't sure where he was.

Ryan looked down at himself in confusion -- stood up, tripped, and fell flat on his face among the various unidentified volumes. The smell of musty old books hit his nose. When he got himself upright again and stepped off the unstable pile, he was face to face with a computer screen, which had a teal background and was flashing the word STUPID at him over and over in blocky golden text.

Grunting, he stepped over to the other computers in the row of five that existed on a desk along the wall. Similarly intellect-anxious text appeared on each: DUMB, LOW IQ, DON'T BELONG, DROP OUT.

A sassy tenor voice said from behind him, "What, are you so dumb you can't even dress yourself properly?"

Ryan whirled around to see... a very tall adult yellow anthro fox standing there looking at him, wearing nothing but a utility belt and a pair of large blue safety goggles. He was not work safe, having a prominently displayed sheath and sack, though not looking shy about it in the slightest. He also had two tails, though this was not initially obvious because of how they were positioned. Still, the idea of a more anthro-leaning adult Tails came immediately to mind. He was around seven feet high and proportionally bigger than a human all over.

In one hand, the fox held the pair of shoes from before, which he tossed toward Ryan.

"Get dressed," he said, as if it was an order.

Ryan looked down at where the shoes had landed and was unnerved to see that they were already on his feet, fitting snugly again. He glanced at the fox's feet and noticed a similar pair on him, except they were more like an ankle-wrap with a huge gap at the front for the large vulpine paws to stick out.

"Now wake up!" the fox told him, adopting a more urgent stance. "You have to get ready for school."

Given that Ryan was dreaming and not at all lucid, he ignored this prompt and instead dwelled on how sleek and attractive the fox was.

As if in response to this, the fox suddenly developed an erection, pink shaft emerging from the retracting sheath. The fox looked down at it in annoyance.

The fox was incredulous at being "made horny" all of a sudden. "Really? Man, am I gonna have to orgasm some intelligence into this dusty brain of yours?"

Ryan felt irrationally amorous, dropping to his knees as the fox got close and then reaching his arms up to grab around the soft, tawny fur of the fox's thighs and butt. Sucking off a handsome fox sounded much nicer than taking any test...

The fox lifted one of those big paws and pressed the four exposed toes against Ryan's face, resting the pads on his forehead. He felt the weight as the foot pressed against him, his nose planting itself straight into one of the fluffy grooves between the beans. The scent was more earthen than musky, as if the fox had been running through dry sand.

The toes pressed on him harder. He would have massaged the arch of the foot if not for the shoe in the way... but getting a rubdown didn't seem to be what the fox had in mind anyway. As Ryan steadied himself against the pressure, he felt the toes slide downward -- over his closed eyes, around his nose, and across his lips, tugging the edge of them down as they passed and making him taste that same sandy flavor for a moment.

Then, without missing a beat, the fox grabbed him by both shoulders and ground that erection along Ryan's left cheek, the firm warmth of it vivid as the fox's dominant look cracked into a toothy grin.

There was no verbal command, but what was necessary seemed obvious. Ryan opened up, suckling first on the tip -- then taking it deeper, enjoying the warm, stiff girth of it.

But as that shaft went deeper into his mouth, it seemed like it didn't stop. Ryan could feel it all the way up into his head, into the back of his skull, as if the space between his ears was totally empty. But it felt nice wrapping his lips all the way around the base and feeling the knot grow for him.

"Gosh, what an empty head you have," said the fox. "At least this mouth of yours feels good."

Ryan sucked him more desperately, feeling the knot really pop and the balls getting tighter. The fox's hands grabbed him by the shoulders and held him closer.

"Okay, you pathetic thing, I'll help," the fox grumbled. "Hhhf... better get ready to... learn something...!!"

Pleasure buzzed in Ryan's head as he felt the fox cum, veiny shaft pulsing on his tongue and sending its large load deep into his head. He would have imagined it cumming all over his brain, if not for the fact it didn't seem like he had one...

Then things were getting darker and less sensuous all of a sudden. The pleasure waned to a hum, and he didn't feel the fox's warm fur in his fingers anymore. Then he didn't feel the fox's shaft, either. Just that fullness inside the void in his skull.

There was darkness. Thumping. A rush of heat.

Ryan jolted awake and sat upright, his heart racing as he inhaled.

What a weird anxiety dream. Was that... some subconscious part of himself? Though, it reminded him a lot of_Tails_...

He certainly didn't have the brainpower available right now to try shifting gears into psychoanalyzing a dream, so he sat up and got ready to--

The shoes were on his feet.

He bobbed his ankles on the bed and swiveled them to confirm this. They were really on, and he was really there, awake, in his room.

His alarm sounded at that moment, and he groaned. No time to question how he managed to put the shoes on again in his sleep... might as well take the test.

He blinked a few times to refocus as he settled into his chair and took a last pass over his notes.

He... wasn't sure, but it seemed like he could understand them better. Sure, that was how lift calculations worked, right...?

He turned away, self-doubt creeping in. No kidding himself, this test was going to suck. He fidgeted, looking down and examining the shoes in curiosity as he waited out the last minutes until start time. Just how did they get on his feet, anyway? Sleepwalking? Sleep... shoeing?

The moment the test was available, he dived in, ready for a marathon of academic pain. He got an easy one for the first question, and then another and another. This continued, and he felt super lucky that he was only getting asked the stuff that he could easily remember from what he studied.

Then it got to the hard part, the more complex questions and written short-answer questions that would be graded subjectively by the professor. His fingers flew across the keyboard with ideas and knowledge as easily as the planes and jets taking off in the examples he was describing. It was all such simple physics and Why do I know all of this?

His self-directed question got no answer as he ploughed through the remainder of the test, finishing strong and without much if any risk of error. He knew everything and had communicated that knowledge clearly.

He sent it. He blinked. He had taken less than twenty minutes to do it all.

"What..." he said aloud, his earlier question coming back to him as the trance of test-taking started to break.

He stood, went to his bathroom, and looked at himself in the mirror. Just the usual him.

...Except.

He blinked. Was that... a speck of blue in each of his eyes?

He blinked again.

Nope. All brown like usual.

He shook his head and went back into his bedroom. What a weird dream and what a weirder exam. Maybe letting Tails fuck some smarts into his empty head was his mind's way of consolidating the information...? Even now he was thinking a little more abstractly about it all than usual.

He sat on his bed and decided it was time to take the shoes off. He took hold of the left one first this time, trying to see whether it would come off any easier.

The answer was a definite no. Not only was it not easier, it was _far_more stuck than last time. He gritted his teeth and strained as he tried to get it to slide down.

Then he felt a body-wide pulse of energy, starting in his head but zinging into every part of him, and particularly resonating with his left foot. It was like his whole body was a heart that had just pumped a beat.

In his head, he heard the fox voice from his dream say,All right... now it's time for Miles Prower to wake up!

Ryan's eyes widened as he both felt and saw his left foot start quivering. Rather than abating as it had elsewhere, that pulse of energy had pooled within it and was causing a scrunching, expanding feeling of pressure.

The already snug shoe was feeling way tighter all of a sudden. His toes pulsating inside it, the bones in his foot feeling tightly swollen and then calm, tighter and then calm again, until...

Cr-crckkk!! The sound of bone changing. Growing.

Shrrrrr... The sound of that lovely shoe... having some problems.

Thin rods of heat had formed inside each of Ryan's toes, his human toenails curling inward with a dull ache until they merged with that zone of heat and grew larger... thicker... puncturing through the fabric of his sock and outward against the toeline, making it strain until the seams started to break. He could feel itchiness and warmth all over his skin down there, followed by a soothing feeling of the agitated skin being covered, as well as the odd sensation of the balls and arches of his feet reshaping into something new.

The net result was a sensation of a foot much larger than before struggling for its freedom -- and steadily gaining momentum. He looked down and saw his ankles swell, the socks' upper limits stretching too.

Then... the fabric at the front of his footwear lost its fight!

Crr... shrrrrriippp!!

Ryan stumbled backward onto his bed, unprepared for what the sudden growth of four massive anthro fox toes and digitigrade-shifting of his foot structure would do to his sense of balance. As he examined them and the way they had shredded through the shoes, he realized they were the same ones from the fox in his dream. He wiggled the huge toes, remembering in a mental flicker how the fox had pressed them on his face.

The pulsating continued, Ryan's legs subtly restructuring themselves to fit better with the paw-feet he was sporting. The resulting heat and pressure were followed seconds later by yellow fur spreading up from his ankles, like a wildfire engulfing the landscape of his skin. It coated around his knees and up his thighs, which were feeling denser with muscle than before. He could feel his average butt tightening as the warmth and fur spread across it, the fibers brushing out against his undies.

Then the spreading reached his tailbone, and there was an immediate jolt of disorientation all the way up his spine and into his brain. It was enough to make him double over as a painful swelling developed along the bottom of his spine. Eyes wincing shut, he opened his mouth and didn't see the sharpening canine fangs already taking shape from what had formerly been his human teeth, nor notice the way his tongue was unfurling a little bit longer within his mouth.

The swollen lump above his rear expanded and lengthened, jutting against his underpants and tenting the back waistline of his camo shorts. Around the waistband he could feel some irritation as the skin there softened, changed, and sprouted fur against the elastic.

Then there was a burst of growth, that lump expanding into a curled-down C shape within Ryan's shorts. Fur sprouted out around his waistband, claiming the small of his back, while that insistent growth continued. He noticed he could move the growing protrusion -- noticed that it was a tail -- and tried to wiggle it around. He got his undies to ride downward enough to free the tail from them partway, but it remained trapped within his shorts while the elastic of the undies squeezed against the tail's base, pushing it upward. It was very uncomfortable... not to mention... tight!!

Then he felt himself getting taller. His ears folding and pointing. His thighs and butt bulking up. His shorts straining and his briefs feeling painfully tight around his bottom. He felt and heard a muffled shredding as the seat of his white briefs stretched out and then tore, something poking out from within them against the interior of his camo shorts. A growing tail!

Heavier pulses. He felt the tail expanding. The fluff of it filling his shorts. The length and heft of it too much for them to accommodate. As his body grew and stretched the shorts to their limit, the fabric started to strain around legs and tail alike. It seemed his changes would be having none of this "clothing getting in the way" business!

Shrrriiipppp!!

His tail found a tiny damaged spot along the seat of his shorts and tore right through it, the fluffy new orange-tan limb emerging through it before curling and swaying behind him. He looked back at it gawking, leaning forward and wiggling his butt as if to convince himself it was really there. He could feel every breezy sensation as it swayed... it was really a tail!

A prickly warmth on his scalp and something moving along the upper edge of his field of vision prompted him to reach up and touch his hair, where he noticed a new growth of a golden-yellow forelock, exactly like Tails would have. He pinched it between two fingers and felt it continue to grow, additional locks growing in alongside it as the rest of his brown hair transformed, with the lower edge of this wave sending fur growth down the back of his neck toward his shoulders.

Unnoticed by Ryan, there was a momentary flicker of blue in both of his irises. For the next short while, he found himself thinking about some of the changes in more technical -- sometimes personal terms as he noticed them. For the most part he was still overwhelmed and thrilled by the changes, but there was this second current in his mind now that was... observing, taking it all in and feeling confident about it.

He felt the heat of change hitting his right hand. Looking at it, he clenched his fingers at their middle proximal and farthest distal joints -- and was rewarded with the visual delight of watching his hand twitch and spasm into a white-furred, charcoal gray padded anthro fox handpaw, just like he was supposed to have , the skin undergoing a leathery thickening in the appropriate spots while his fingernails curled inward on themselves and hardened into dark claw-tips. The other hand rapidly followed suit, whitening and gaining pads before transitioning into yellow fur at the wrist, creeping from there further up the arm.

While still marveling at his first-changed hand, he felt a prickling on his chin that spread down his front -- more white fur growing in rapidly, as if he were watching it in a timelapse. It gave him an exaggerated goatee for just a moment before evening out, flowing down his neck as a solid white coat. When it reached his chest, the white fluff spread further downward in a double concave pattern that intersected his navel.

For a split second he was hit by a big-picture sense of how perfectly clinical and logical this all was -- that mental observer seeming to stir for a fleeting moment before more sensory distractions made Ryan lose track of it.

There was a sudden thump of pressure in his nose and front of his face, but he didn't have time to examine it before another feeling of pressure in the rear of his shorts drew his attention. His legs were swelling bigger, and a second tail was growing in -- this one arcing upward as the combination of the shorts and the first tail gave it nowhere else convenient to go, the tip routing itself under the edge of Ryan's shirt.

The more he flexed and strained in response to this discomfort, the tighter he felt the fabric of his undies and camo shorts around his pumping-up fox legs, and the more frustrating it became to have that other tail pinned upward. He gritted his pointier teeth and caught an enhanced sniff of his own sweat and deodorant as something in his nose started to change. Feeling the growth insistently continuing, he did what had to be done, flexing his butt and thighs hard...

Shrr... shrrraaaaaaaappp!!

Making his shorts shred like old rags felt so relieving! As the camo fabric hit the floor, his upper tail was free to...

...To get stuck tighter under his too-small shirt as his chest and waist muscled-up too and overfilled it.

A rush of anger prompted him to flex the tail downward with all his might and bend forward. He felt its puffy tip growing all the way up to touch the back of his neck, the length of it trapped but exerting plenty of effort within the shirt.

Shrrrrrred!!

The back of the shirt bifurcated. His undies creaked, the elastic faring poorly as their already-torn seat wiggled around the first tail.

By then, Ryan was noticing a rush of bloodflow to his groin as well. Considering the pleasant heat the vasodilation the transformation was causing, to say nothing of his attraction neurologically mediated sexual response to the form itself, it was only natural that he was so stiff in the front side of his undies that he felt like his shaft might soon breach them there too.

Rippp... pop!

The elastic waistband gave way, allowing his waving and whirling tails -- they seemed almost to have a mind of their own -- to cast off what was left of his lower garments. His erection flopped free, so hard that it quickly stood almost vertical on its own. Looking down at himself, he could see the way the white fluff of his belly had creep down to his pubic hairline, now converting it into a shaggy mess of fox fluff that would surround his shaft and balls.

He stood upright with his arms back as he beheld himself. Fur and lean muscle now covered every part of him, his hearing was growing more accurate as the wide dishes of his fox ears grew into place.

From there, it was a cascade of harsh finishing touches. His sense of smell expanded further with the ongoing growth of his proper muzzle. His longer tongue drooped from his mouth in pleasurable delight as he felt his foreskin thickening and drawing itself down, revealing a redder and narrowing cocktip within. Blushing, he reached to touch himself, before looking down and just watching the process unfold. His human shaft transitioning, redder still and now thicker at the base, the lobes of a proper knot forming just in time for his foreskin sheath to finish drawing back. Joyous and struck with a rush of pleasure, he dropped back to a seated position on the edge of his bed, supporting himself with his arms and panting.

His muzzle was nearly formed now, still bare of fur as the area around his nostrils cooled and darkened to black. Ryan was zoning out into the pleasure and heat of it all. Really turning into Tails. He was almost done, he was almost there... I've almost replaced the human fully...

With a satisfying burst of growth, fur covered the fully formed face of Tails, although his irises were still Ryan's usual shade of brown. Then there was a fleeting flicker of blue.

"Fascinating!" said Tails aloud as he quickly looked himself over. "Charging the subjects' apparel with ring energy and sending it through the portal did not allow for direct transport of the subjects. This proves that organic bodies can't cross into this dimension directly...but, transit into the target world via quantum transmutation of existing residents is still possible! There just needs to be an existing organic host to wear the item, and we can turn them into us!"

After that, there was a confusing mental jolt, and his eyes returned to brown. A rush of darkness, warmth, and uncomfortable prickling sensations as Tails' emerging mind synced up more heavily with the host body.

Tails felt... hot, needy... what in the...?

His foxy eyes narrowed. Was he horny because of this?

He didn't need his usual brainpower to determine that_yeah, he totally was_. Then he remembered, vaguely, as if from a dream, having seen and felt imagery of these changes in the moments before he "woke up" in his host. He put a hand to his shaft and felt the rock-solid heat of it and the gentle zing of pleasure.

That was as far as Tails got before he started feeling kind of... funny. Dopey, almost. A stray thought drifted in about how_nice_ this all felt. A thought which he didn't think was his own. His hand started to jerk his shaft without his meaning for it to -- his body lying back without his permission and starting to hump into his firm, foxy-padded grip!

Tails strained to regain control of himself, even as his eyes gazed happily into space.

Someone... he... they? -- felt very happy about this situation. The knot, so hard and warm, it was incredible. He knew he was accustomed to having it, but he didn't feel used to having it. It felt brand new, worthy of exploration -- all of his brain's curiosity nodes firing to seek out that "new" sensation.

He dangled his tongue. He drooled. He stroked himself and let out a long, luxurious groan. A_Ryan_ groan, though he didn't yet realize that's what it was.

Such big paws, such a nicely toned and athletic body. He had grown strong and healthy in his adult years. -- Of course he had; why was he thinking that like it was new too? Yet, when he looked at himself, he judged himself -- however briefly -- through the eyes of someone who absolutely adored him.

He felt... sexy. Horny beyond belief. He wanted to do naughty things with himself. Somehow. Alas, there weren't two of him the way there were two tails!

He jerked himself quicker, milking that knot, his other fingers exploring up the shaft and teasing at the tip. It was absolutely wild. So wild that he was getting close to finishing.... really quickly.

Quickly enough that he sort of... stopped himself, felt his cock pulse in his hand, and paused to try to think.

Something still felt wrong about this setup. Ever since he finished that first burst of held-over thoughts, it was like his mind had slowed to a crawl, dragged down by some sort of contaminant.

Indeed, the more he considered this, the more he was able to step back a tad from his horniness and realize that his normally lighting-quick powers of deduction and visual-spatial planning were moving at a snail's pace, as if caught in some icky-sticky brain gunk! It was like some unclever glue trap Eggman might lay for Sonic and him,except in his head. His thoughts could hardly move at all like this, let alone race as they ought to!

Then he thought back to what he had realized about the quantum transmutation... and came to a somewhat demeaning conclusion.

"Gosh, did my shoes get put on by someone super average?" Tails wondered aloud as his brown eyes started to distort, impurities of blue emerging in the irises briefly before temporarily fading. "I'm such a genius I can't even_imagine_ being this dumb!" Resuming stroking himself because it felt so good, he added, "Mmm, but this won't do at all, no sir! Hrf, I'm gonna push all this dumb right out, like ballast off a hot air balloon, so that I can soar high like I'm supposed to!"

While Tails monologued about his intellect and plans, Ryan's mind stirred below the surface. Like a gamer mashing every button in hopes of skipping a cutscene, the transformed human struggled to exert some control over the current situation.

What Ryan got was a foggy, buzzing return to awareness. His body felt warm and mostly numb; only his head seemed movable as he sniffed the air and licked his vulpine chops experimentally. He could feel the thrum of blood pressure in his knotted cock, but he couldn't make his hands do anything about it.

Ahhh! said the voice of Tails in his head. And there's our ballast!

Ryan resented the idea of being dropped like a sandbag, but he found himself with no power to resist as the other parts of his body moved on their own, sitting upright on the bed, with his legs resituating to a pose resembling the lotus position. His hands adjusted things so that his pulsing shaft rested atop his left ankle, with the tip prodded along his right calf. His back rocked in a way that made his neck bob forward, visually pointing out his meaty paws and needy shaft.

You liked my paws, didn't you? I remember our little dream now. Why don't you show me what a good, dumb human should do for a fox with a superior mind?

Ryan produced a shrilling fox noise: anxiety and arousal both in one sound. His puppeted hands hoisted his right foot, and his spine curled forward, pressing those leathery soles with their fluffy white in-betweens against his face. His nostrils pressed in between them -- feeling the soft strength of the paw-beans: the ball of the foot, the island of each caressing toe...

Oh, my, you really do get into me...

Ryan meant to answer, "No I don't!" but slurred it incomprehensibly as he let his tongue start to lick, the slender bit of moist fox anatomy finding its way into the crevices, letting him experience the exact contours of the shape. The buzzing in his head made it all feel surreal, but he knew it was really happening: he was really licking and suckling and nibbling on this perfect foxy foot, it pressing against his face to show him his place, his shaft feeling hotter and harder even though he had no control. There was an aching, small spasm inside his groin, his body responding as if he was about to cum just from the joy of this moment. The left leg bent inward, brushing the ankle's fur along the cock to tease it.

Ryan was in paw heaven... which made it all the more heartbreaking a moment later when that buzz in his perception got louder, until it became a static that blocked him even from controlling his head. The tongue continued licking regardless -- but now under Tails' control.

So caught up in such a simple pleasure, the fox taunted him as he ceased the slurps and set his feet back on the floor along the bed. You really are as dumb as you look.

Ryan felt his control slip severely -- like a rock climber who had lost his grip and was now dangling from his belaying rope. From the way he felt, Tails was_already_ trying to push him even further down and away from the towering mountain of his intellect.

The fox-genius stood up, erection still pulsing, as he decided what to do.

"Now then!" said Tails as he punched his left hand lightly against his right palm. "If I focus the principles of Mobian Chaos, while our body is still in this state of transformative flux, I should be able to cast off all this mental dead weight via further quantum manipulation. My shoes still have a bit of ring energy in them, so all I need to do is focus -- guide the chaos to move the dumb out of this body!" He stroked his chin while stroking his knot. "But it'll need an organic component to attach to." His shaft throbbed more, and it dawned on him. "Oh, of course!"

The contaminating remnants of Ryan's mind started to drain from Tails as the fox concentrated hard, jacking himself and focusing on sending anything of lower intelligence out, attached to his semen as part of the coming orgasm. The pleasure from the buildup felt supercharged. As what was left of Ryan's mind seeped into his oh-so-expendable essence, the blueness in Tails' eyes returned -- and grew.

"That's it... starting to unpack all of my knowledge of aerodynamics, lift, drag... all those nice aircraft schematics I memorized, the materials I'll need..."

The fox laughed, feeling his dick pulse hard and nearly blowing, but holding back at the edge to enjoy it as his mind expanded.

"Ahhh, I can feel it all coming back to me... so much sharper!" He couldn't help laughing a little as it dawned on him again: "Wow... I'm so much more intelligent than this loser!"

His eye colors cycled faster, the blue claiming more with each pulse before briefly retracting. With each iteration, it claimed more and more, his edging approaching a fever pitch where he would be able to make himself cum with the merest thump of a finger or puff of warm air.

Just when the pleasure of edging was reaching its greatest point, Ryan managed to break through -- if only briefly, pulling the eye color back to his own. He gained control of his head and struggled to make his horny fox-self stop this maddening buildup of bliss, but even as he gritted his fangs and awkwardly growled and grunted, there was no way to stop his athletic arms or those smooth hands of his from kneading that knot -- his member twitching in warning, on the very edge but not passing over. When he realized he couldn't stop it, he tried making it cum sooner instead, but neither could he accomplish that. Tails' grip over his horny body was as iron, and Ryan's momentary grip over his head and neck only further served to accentuate how powerless he now was.

Sorry, human, but the ballast has to be dropped. No hard feelings though. I'll use your body much better than you ever did, because I'm waaaay more capable of formulating a good plan for living. Why not get lost in my mind for a sec before you get shot out? It's so big I'm sure I could fit a dozen of yours, maybe more! It ought to make for a spectacular view!

Ryan felt a chill and a draining as the fox's head-voice grew louder, seeming to boom around him, the eye color vacillating back to blue again. He could feel how much bigger the fox's mind was than his, and felt himself seeming to shrink smaller, sink lower... lower...

...Flowing down a gutter, slipping down his spine with the buildup of the pleasure toward that climactic moment, while the fox's mind continued to unpack itself unopposed...

"Ahhh~!" gasped Tails as he reclaimed the head, teasing himself right up to that razor's edge -- shaft twitching as Ryan's mind got forcibly infused into his held-back load. " I even remember the physics that enables my two tails to generate enough lift to move me like a helicopter... something that a dumb human could never have comprehended!"

Tails rose off the floor, his namesakes twined and rapidly spinning, the elevation causing his shaft to angle down, his nuts supporting the firmness of his knot. That one quick jolt-and-bounce was enough to set off the hair-trigger climax he had set up with an engineer's precision.

"That's it... Tails! Has! Liftoooooff~!"

The ejaculation that followed really did let all of that_dumb_ go shooting right out! As his eye color rolled over fully to blue, Tails' effective IQ soared from Ryan's unmentionable sub-100 value to a stratospheric 300, his mechanical supergenius having come through intact.

He landed a few moments later, panting and rubbing his forehead with a palm as he noticed an inconsistency in himself. "That's funny... I don't usually feel such a need to compare my intelligence to someone who's lesser. Maybe this host body secretly enjoyed it."

He looked down at the mess on the floor, knowing that the dumb host had been discarded with it, and shrugged. He supposed he'd never know the answer to that one now, so it wasn't worth dwelling on over-much.

What was worth dwelling on, though...?

"I need to get myself a utility belt, right away!"

He darted off, still quite naked and unembarrassed about that, to rifle through Ryan's belongings for anything that would do. He might need to scrounge at first, but he was sure he could manage. He had a sense this world was a lot higher-tech on average, so there should be plenty of useful items for him to find if he explored.

Then he could start building a plane!

Or a jet.

Or a spaceship!

Entire schematics flickered spontaneously through his thoughts. ...Where had that human kept his pencils and paper?

* * *

Knock-knock-knock...

Tails broke from his thoughts and diagramming, ears perking and swiveling as he zeroed in on the door. With his namesakes whirling behind him, he darted over, stopped, and peeked through the peephole to see who was there.

A blue anthro hedgehog, head angled as if to survey the ground and already tapping a foot in impatience.

Well, that was quick. It had only been half an hour since Tails' own arrival. He had assumed he was the first among his group to find a way into a host, but apparently not.

The fox opened the door. "Soni--?"

A blur of motion followed as the hedgehog instantly crouched and rolled, bowling Tails over and catching him along the upper back -- all somehow in time to cushion the fall. "TAILS!! How ya doin', buddy?"

Tails' ears tilted back. "Uh, hey to you too, Sonic! You're looking more humanoid too here."

"Yup, but no worse off. That's just how things go in this world. Looks like you got some big honking paws out of the deal." He reached a hand back and tickled the sensitive pads of one, causing it to kick immediately in protest.

"They're not geese!" Tails said while fighting down laughter.

Sonic smiled and let go, so Tails got to his feet and dusted himself off. He examined Sonic better and squinted. "Did you really run over here naked?"

"Hey, no harm in streaking when a streak is all the eye can see!" Sonic flexed before backstepping and kicking the door closed. "I'm bored out of my mind, man! I got here two whole weeks before you did."

Tails touched his chin in thought. "Really? We activated the quantum teleportation device at the same time..."

"Yeah, but our items got put on at different times. My guy knew a guy who likes you, so I dropped off your shoes like they were bait!" He fist-pumped proudly. "Easy win, easy life!" He grinned.

"Wait... likes me?" Then Tails realized, the memory finally syncing up. "Oh. We're... considered fictional characters here? Weird!"

"YUP!" said Sonic. "No clue, no care... but hey, as usual, you're arriving just a_liiiittle_ slower than me."

Tails glared daggers at him and folded his arms. "No speed shaming! I didn't have any control over this delay."

"Haha, I know, bud." He looked a little embarrassed at his dickish comment and averted his gaze in shyness for a moment. In a softer voice, he continued "Hey, uh... you still good to follow up on that deal we had if this plan worked to get us out of where we were?"

The fox's tails swished up and down quickly in consideration. "Hmmm... I've got half a mind to say no after your implying I'm a slowpoke..."

"Aww, I didn't mean it! I mean, nothing bad."

Tails smirked. It was fun watching Sonic squirm in his impatience sometimes. Sounding superior but magnanimous, the fox said, "...I do suppose it's important to see whether this body can handle the fastest thrust in the multiverse. You know, for science."

"Heheh, yeah! That's the kind of science I like!"

Tail's eyes narrowed. "It's the only kind you like, you dumb jock."

"Hey! This dumb jock is about to give you the jockeying of a lifetime."

Tails sniffed the air and blepped. "There, now we're even!"

Sonic's mouth scrunched to the right and he stepped forward to get handsy. "All right, smart guy, c'mere..."

All these years on, being manhandled by his adoptive bro and/or adoptive uncle was something Tails had come to enjoy a lot. Sonic couldn't lord over him too much about physical advantages when Tails' brains had gotten them out of jam after jam over the last two decades. Even when Sonic was kind of being an ass -- as he was right now by pinning Tails' arms to his sides and force-talking him into the bedroom -- there was an understanding between them.

"Before you go jumping the gun again," said Tails, "I've got lube right over there." He nodded toward some of the belongings that had once been Ryan's.

Sonic released his hold, darted over, in a blur, and was back in a second... but something about seeing him touch those belongings caused an uncomfortable stirring in Tails' mind.

What... what was this?

Ryan -- what was left of him -- stirred again. Catching Tails off guard as those feelings of love and fondness for Sonic governed him -- sparked back to consciousness by seeing his, Ryan's, bottle of lube...

The former human's soul was not whole anymore, but he didn't know that. He felt foxy and horny just like the body as he reclaimed control of it. His weakness was shored up by the desires he felt: Sonic behind him, ready to go to town on him, ready to loop-de-loop his mind into a perfect spin of pleasure...

But as those white-gloved hedgehog hands grabbed him, Ryan remembered more of himself. This... wasn't him. The hedgehog had taken over another someone else's body, too. He had to fight back! He had to stop them, or at least get away!

Ryan ran forward on panicked instinct, surprised at how fast his legs could move as he bolted for the window by his bed. He wasn't sure how he was getting out, but for some reason diving face first through it like an action hero -- glass shattering -- didn't seem like such an implausible idea. He had the body of a grown-up Miles "Tails" Prower, after all.

...And that all sounded well and good, until there was a blazing sound of shoes on carpet, Sonic darting in front of him, stopping on a dime, and then lunging at him in a forward tackle.

The resulting collision upended them both, making them somersault in midair before the horny Sonic landed on top of him. The bottle of lube had somehow gotten from his hand to between his teeth during the split second before their collision, and Sonic now spat it out and popped it open, squeezing a healthy amount onto his shaft and giving it a series of speed-blurred strokes that instantly coated it in a smoothed-out amount of it.

By the time Ryan could say, "Wait!!" Sonic had already jammed two lube-soaked fingers up his tailhole, helping to apply it... and oh fuck it felt good...

Ryan gasped, becoming abundantly aware that his body itself was into being fingered by Sonic like this.

"That human giving you trouble, buddy?" Sonic asked seductively as he withdrew his hand and straddled his way forward, keeping Ryan pinned with his thighs and both arms.

"I'm not..." the transformed fox started to say.

He trailed off. That cheesy half-smile. The man straddling him, equal parts jerkass and fun-loving hero. Being held down by the hedgehog... this was...

Exactly where he was supposed to be, right?

The surprised, browned-out moment for Tails' eyes ended, the bright blueness returning. He blinked -- kissed Sonic eagerly on the mouth, and drew him in closer, hiking his butt up off the floor and grinding his balls and taint along the hedgehog's goods.

When their kiss broke, Tails whispered, "There's still some of him left, but if you help me cum again--"

Sonic raised a finger to shush him -- then arched both eyebrows once. "You know perfectly well how that's gonna end, buddy."

Sonic, on his knees, hoisted Tails' rear higher -- entered him, pelvis thrusting at a blindingly rapid pace and grinding their action forward. What started as anal missionary transitioned into an awkward version of the anvil position in the course of about ten seconds: the fox's tails spread wider, his spine arched higher, and Sonic was forced to rise to a squat and go at an increasingly elevated angle, until he was thrusting almost vertically downward while straddling his buddy on all fours.

Eventually the length of Sonic's limbs became a limiting factor. Giving Tails' renewed erection a few quick jerks, he pulled out and tapped a foot while gesturing at the nearest wall. "Get up already!" he teased. "Let's do this right!"

The fox sprang to his feat, ass clenching from the hundred-thrust short pounding it had already gotten. "Are you sure there's a stud there?" Tails wondered, legitimately questioning whether the interior wall's structural integrity would survive a round of Sonic fucking him against it.

"There's a stud right here, I know that much," came the cheeky reply.

There was no time for a stud finder joke. Tails took it on faith that the wall would hold and pressed his hands and face against it, waving his namesakes high to entice his bro back in.

Sonic darted in, his erection jousting up under those tails and finding their mark on the first try. Tails felt the delight of his body mashing lightly against the wall, his partner's strength and speed driving his pleasure toward the roof as a frenzy of blinding-fast short thrusting resumed.

And it was nailing his prostate.

Over. And. Over. And overand overand overAndOverAndOver AND-OVER!!

Tails moaned out, the wall quaking but holding as he was almost-literally jackhammered against it. Within him, the last of his cum was getting milked from his prostate -- his cock was twitching, the seed welling up within him, soon to burst...

Ryan became self-aware again. He had technically been conscious this whole time -- feeling the sensations, feeling himself swell hard again, but...

But he felt funny. Tingly. Hot.

He... he was Tails' cock. Feeling what it felt. Feeling himself rooted in the churning cum that was about to shoot free.

Sonic reached around -- grabbed him. Jerked him. The kid-leather sports glove feeling so wonderfully familiar on his shaft. This was how he ought to cum... embraced by his speedy bro and feeling that grip of his milk the load out of him. Between the rapidly jerking hand and those exquisite thrusts, it was like being hooked up to a milk-and-fuck machine, except warm and strong and--

Ryan's awareness jolted. He felt euphoria. He felt... rising. Wet, hot, flowing, pressured...

Tails screamed his delight and blew his second load hard against the wall, smearing what remained of Ryan's consciousness all over the wallpaper -- and casting it out of his body for good.

As was their custom, Sonic pulled out for a moment to let Tails catch his breath. The hedgehog's shaft twitched, bobbing up against his belly as Tails turned to look at him.

"You still haven't... wow," breathed Tails.

"I've been practicing up for you," Sonic said with a wink.

Panting, Tails lifted his namesakes twice up and down, feeling frisky at the thought of getting ploughed by his bro one more time... all spent and nice, the feelings so cozy...

Tails made his way back over to the bedside and he shot Sonic a playful grin. A one-handed shove from the horny hedgehog put Tails' upper body onto the bed, now self-supporting on his hands and elbows. The tails lifted and fanned to either side; he felt Sonic step up, petting along both sides, that hot member lining up once more...

Gently at first, spreading him open again, just those first few motions... then...

Tails' eyes and ears skewed, his jaw relaxing as he felt Sonic start working his high-speed magic in earnest. His foxy fingers grabbed at the bedcovers, and his tongue lolled in delight.

Romps like this were about the only way Tails' mind could feel peacefully, therapeutically empty for a moment. It was much better -- a lovely contrast to whatever that moment had been when he first woke up and still had all that human brain fuzz to struggle with.

He heard a strained noise rising in Sonic's throat -- felt the blue one's member throbbing in warning.

He was edging, the poor guy -- still trying to hold back to ensure his fox got all the right amounts of pleasure.

"Let it out, bro," Tails whispered. "Lemme feel you in me... all of it."

Sonic lunged forward -- hilting fully, wrapping arms around the fox's torso and pressing chest upon back.

Sonic's pumped-up eruption arrived, jetting into the fox's rear with such force that he could feel it -- walls and pucker seizing delightedly around him. Tails arched his butt and he let out a quieter moan.

"Worth the wait?" Tails asked his partner.

Sonic took a deep breath, holding the pose. His voice full of warmth, he answered, "Always."