It was a nice day as Sonic headed outside, but he had other things on his mind than going outside to play around. It took him almost fifteen minutes, but he finally found Tails outside, flying around and playing with some toys of his. Sonic grinned, and started waving to catch his friend's attention, finally getting Tails' attention.
     "Hey, Tails," Sonic shouted, "come over here! I've got a big surprise for you!" At this news, Tails immediately abandoned the toys he was playing with, quickly flying over and landing next to Sonic, grinning from ear to ear.
     "A surprise?! Oh boy, what is it? What what what?"
     "Well if I told you, it wouldn't be a surprise, now would it?" Sonic asked, grinning mysteriously. He chuckled. "Say, Tails, the surprise is in my room. I'll race you there -- last one there is a slow-mo robo-turd!" And before Tails could even react, Sonic was off in a blue blur, the poor fox flying after him as quickly as he could, shouting "hey, no fair!" and "c'mon, Sonic, wait up!"

     They were a pretty good distance away from the Freedom Fighters' HQ, as Tails was out in a small clearing playing. He had been playing for several hours, and was already quite tired, so by the time he reached Sonic's room, he was out of breath and panting. After stopping for a moment to catch his breath, he pushed on Sonic's door, finding it was open. He stepped inside, and his ears flattened against his head slightly as he looked around. It was a while since he had last been in Sonic's room, and the place was covered in porn, mountains of dirty laundry covering the floor, and more. Sonic, who had been waiting behind the door, quickly slammed the door shut. He locked it, took out the key, and tossed it aside into one of the dirty laundry mountains before Tails looked over at Sonic. He decided not to comment on the room -- granted, while it wasn't quite as messy and certainly not with the same things, it was still pretty bad -- and smiled at Sonic.
     "Well, where's my surprise?" Tails asked excitedly. Sonic grinned back, rubbing Tails' head and messing his headfur up.
     "Patience, Tails, patience." He noticed the fox panting, still tired from his hours of playing added to the journey back, and chuckled. "Boy, it looks like you're really getting out of shape if a little run like that wore you out so much!" He scratched Tails' tummy gently, tickling him slightly. Tails giggled and knocked Sonic's gloved hand away from his ticklish belly.
     "Well it's your fault you know," Tails said. "You're way too fast and you didn't even give me a chance to start before you took off!" Sonic just laughed, now tickling Tails' belly more vigorously.
     "Excuses, excuses... robo-turd!" he mocked. Tails began to laugh and giggle, trying to catch Sonic's quick hands to keep them from tickling him.
     "Hey! Hee hee! Come on, knock it off! Ha ha! Cut it out, blue-butt!" Tails said between giggles, which only prompted Sonic to begin tickling him even harder and including under his arms and his sides in his tickling range.
     "Blue-butt, huh? That's *mister* blue-butt to you, slow-mo!"

     Sonic was having fun playing with Tails like this, but his desire to go on with his real intentions was growing quite quickly. By now, Tails was being tickled so hard he was having trouble gasping for breath, and staggered backwards onto Sonic's bed. The young fox was unable to help himself from being aroused by the experience, as his red cock quickly poked out of its sheath, his knot beginning to swell. Sonic grinned. and as Tails tried to catch his breath, Sonic quickly grabbed a large cardboard box from the floor next to his bed, jumping up onto the bed and sitting on top of Tails, pinning him down. Tails looked up at him.
     "Remember the surprise I told you about?" Sonic asked. Tails nodded. "Well, this is just the beginning!" Sonic opened the box and pulled out an extremely large, opaque black, rubber condom -- the box was filled with identical ones but of varying sizes. Before Tails could react, Sonic forced open his mouth, shoving the condom inside and holding Tails' muzzle shut. The condom was large enough to make quite a bulge in Tails' mouth, and his eyes widened in surprise. "Swallow," Sonic commanded, suddenly becoming serious. The poor confused fox tried to open his mouth to spit it out, but Sonic's grip on his muzzle was too tight, and he had no alternative but to do as he was told, swallowing hard to try to get the object down his throat. It took a few swallows to work it all the way down, and there was much gagging involved, but he finally managed to do it. Sonic smirked.
     "Good boy. Now if you just do as I tell you, things will go nice and smoothly for both of us. Tails, still in a state of shock over being forced to swallow the condom, simply nodded meekly. Sonic reached in the box, pulling out a bunch of condoms, setting a pile down on Tails' chest. He began by sorting through and taking a big handful of some rather small ones. He turned around, and took Tails' foot in one hand, using the other hand to work the condoms over Tails' toes. The tiny condoms stretched enough to where they were a tight, but comfortably snug, fit. After covering the toes on both his feet, Sonic took two more, this time larger, condoms. These he slid up Tails' legs like socks, reaching all the way up to the bases of his legs. These, too, were not too tight, but comfortably snug, leaving Tails' legs encased in the black rubber with featureless feet on the bottom. Tails instinctively began to try to wiggle his toes -- he found the tight rubber condoms were very snug, but actually quite comfortable. Sonic smiled, rubbing Tails' head again, then repeated the process with his arms, first covering all his fingers in the tiny condoms, then taking larger ones to cover his entire arms up to his shoulders. Now Tails' hands looked very similar to his legs, covered in the smooth, shiny rubber condoms, leaving only featureless mittens for hands. Sonic took one more condom, putting it opening-side first in his mouth, and held his muzzle shut again. This time as he tried to swallow it, however, it coated his tongue all the way to the base, and as Tails gasped and gagged and tried to get it off, he found there wasn't anything he could do to get it off. He struggled, but found the condoms, perfectly smooth and lubricated on the outside, gave him absolutely no grip on the bed to try to get away.

     Another black condom was stretched over Tails' muzzle, sealing it shut. His sense of smell was muffled by the condom and the overpowering scent of rubber. Sonic rolled the helpless fox over, taking two more condoms and stretching one over each of his tails, covering them down to their bases. He rolled Tails back over, grinned, and took one more condom, stretching it down over his head, forcing all the air out so that it adhered to and took the form of Tails' head. The opaque condom blinded him, and Tails immediately tried to pull it off his head, but his mitts were good for absolutely nothing. Sonic grinned, and poked Tails in the belly.
     "Boy, now you even *look* like robo-turd," Sonic chided. Tails tried to make a remark, but the condoms covering his muzzle and head muffled it and left it unintelligible. "Now, you stay here, I need to get something to finish up our preparations. Don't go anywhere," he teased. Sonic wasn't too worried about Tails getting out of his "restraints," and got up to go get something else. As soon as Sonic had turned around to look for it, Tails immediately tried to get up off the bed, managing to squirm his way off. He quickly found, however, that the slick condoms gave him no friction whatsoever and he only managed to crash to the floor. Undaunted, he tried to squirm along like a worm towards the door, but the blinding condom over his head only served to disorient him, and he ended up managing to squirm into a pile of Sonic's dirty laundry, which toppled over, burying him. Sonic, in the meantime, had taken a modified vacuum cleaner and plugged it into the wall. When he turned around, however, he found his "victim" was nowhere to be found. It didn't take long to pinpoint his position, however, as he saw a pile of laundry moving. Sonic dug Tails out, picked off a pair of underwear which managed to get stuck on his head, then carried him back to the bed, forcefully slamming him back down, causing the fox to yelp loudly through his gags.
     "What, you thought you could get out of here like that, stupid? In case you didn't notice yet, those covered hands of yours couldn't operate a doorknob. Your brain must be an even bigger slow-mo than you are." Sonic began to feel Tails' smooth, rubber-coated body, and as he ran his hands along him, Tails' cock began to get even harder, partially from the feeling of the rubber against him, and partially from the sheer confusion of his situation and anticipation of what was going to happen to him. Sonic took another condom out of the box, covering Tails' cock with it, then took one last, slightly bigger, one out of the box and covered both the condom he had just put on and the base of Tails' cock, pushing his balls up into it as well to make them stick out slightly.

     Satisfied, Sonic took the hose of the vacuum and roughly shoved it up Tails' tailhole, meriting a loud yelp and squirming from the fox as he was invaded. He sat on Tails' legs to keep him from moving, and worked the hose in until it was a fairly airtight seal; it also helped that it was being pressed between Tails' butt and the bed. Sonic flipped the vacuum on, but instead of sucking, the vacuum was modified into an air pump, beginning to slowly pump air into Tails' butt. Tails began to flail wildly at the strange feeling and cried out in his rubber condom mask, his cries muffled. Sonic held Tails' arms tightly and pressed them against the bed.
     "Don't worry, this will all be over soon," he said softly to the captive fox. As soon as Tails had calmed down slightly, Sonic released his grip on Tails' wrists, petting his chest fur softly with one hand, attempting to further comfort the confused, terrified fox. Tails somehow sensed this, and while he did enjoy the feeling of being pet, he hated Sonic deeply at the same time for doing this to him. As the vacuum continued to pump air into him, Tails felt his body begin to get a strange feel to it, and couldn't help peeing himself, the condom swelling up ever so slightly and becoming warm to the touch. Sonic continued to pet Tails' soft chest fur, watching him closely as his body began to bulge ever so slightly. He continued staring, watching as the bases of the condoms seemingly began to fuse to the fox boy's flesh. Tails began to relax, his breathing eventually slowing and finally stopping without him realizing it. To his surprise, though, he found his vision was beginning to return slightly; he could see dim lights and vague outlines of things in the room. He figured to himself it was because his eyes were finally starting to adjust to the rubber mask over his head; he didn't know it was really because his eyes were beginning to fuse with the rubber, becoming his own. Sonic, in the meantime, continued petting Tails to keep him calm, and watched as the flesh under Tails' soft, dense, short fur began to take a dark tone to it, eventually turning black. As Sonic continued to pet his chest, fur began to come off in his hands. It was almost like Tails was shedding, but with much more fur coming off. Clumps of fur began to fall off of his body, falling onto Sonic's bed as smooth black rubber took its place. It wasn't just on his chest; it was everywhere else his fur was exposed as well. Soon, there was no fur left on Tails' body, and the black rubber of the condoms fused with the rubber of his flesh, becoming his new skin of sorts. The sensation of the changes made Tails begin to get excited, but he certainly didn't want to let Sonic know (he was still quite angry with him).

     Sonic watched as the hose in Tails' rear began to almost get pushed out, but found that it was instead attached to a transparent air plug. He saw a similar change begin on Tails' muzzle, and the smooth rubber fox almost smiled, not realizing that his lips had puckered up and smoothed away as the transparent air plug became the only remnant of his mouth. The rubber finished merging with his eyes, and Tails found he could see. It certainly wasn't as sharp or clear as before, but he didn't mind. A strange feeling of bliss began to spread through him, his entire body feeling light and full. He tried to move, his rubber skin squeaking softly against Sonic's legs. Sonic pressed down on Tails' belly slightly, finding it was firm, and he detached the air pump's hose from Tails' air plug, closing it quickly so no air would escape. Sonic turned off the air pump and set it aside, then grinned and began to run his hand along Tails' new body, finding it to be seamlessly smooth. He squeezed one of Tails' tails, finding it felt more like an inflated beach balloon than a rubber-covered tail. Sonic grinned; the change was complete.
     "Surprise," he said chidingly as he quickly hopped up, stripping. He climbed back onto the bed and laid next to Tails, running his hands along his smooth rubber body and finding himself get erect rather quickly. "So what do you think?" he asked Tails, knowing good and well the fox would be unable to respond. Tails lifted his head slightly and looked at his new body, a million questions floating through his mind. He tried to ask Sonic what happened, but no sound except for the soft sound of rubber squeaking came out. He knew none of his questions would be answered. He looked down at his cock, inflated to be slightly larger than it was before, and squeezed it slightly, finding it was just as pliable as the rest of him. He looked at Sonic, not sure whether to be livid with anger or filled with curiosity. Sonic, however, had other things on his mind, and quickly popped open the air plug on Tails' rear end, sticking his erect cock in and pumping back and forth. Sonic, already incredibly horny from the entire experience, didn't take long in exploding inside of Tails, sighing happily as the poor rubber fox boy squeaked in confusion.

     When he was done, Sonic pulled his cock back out, and opened the air plug on Tails' mouth as well. Air slowly began to flow out of him, but Tails didn't show signs of deflating just yet. Sonic grinned at him.
     "Did you like that, Tails? Wasn't that great? And just think, we can do that whenever I want now that you're my permanent inflatable rubber fox toy!" Tails panicked upon hearing the word "permanent," but found as the air continued to flow out, his entire body began to droop, becoming flat. He tried as hard as he could to close the air plug on his mouth or butt, but his emptying fingers did little to help. His "erect" cock quickly deflated, laying flat and limp on his body. Sonic sped the process along by pressing down on Tails' tummy, forcing air out of his rear air hole as a noise almost like a fart came out from the air being forced out. Tails, now unable to protest or move, quickly found a feeling, almost like being sleepy, begin to wash over him as Sonic squeezed the last traces of air out of him, closing the plugs to keep him deflated. He looked into Tails' flat, rubber-covered eyes one last time and grinned as the fox drifted off into a sleep-like state, and Sonic tightly rolled him up, taking one more extra-large rubber condom from the box. He slid Tails' rolled up form into it for easy storage, opened a drawer, and tossed Tails inside, closing it and going to clean up.