Stretch to Fit

Story by Ryuko Yasunaga on SoFurry

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AnpuRa is having a great start to his day. It was a nice day out, the subway wasn't packed, and his new trunks came in. He can't wait to try out the special pair.

Very fun idea, lots of growth and an explosive ending. I had a great time writing this one.

AnpuRa and story belong to Anubiiswerewolf on FA

Written by me


Today was already turning out to be a great day. The package AnpuRa had been waiting for got in nice and early, there wasn’t a crowd of people on the subway, and it was a pretty nice, warm day out. Getting into the gym with his back over his arm, he was ready to not just do his normal routine, but to try out the new trunks he had just gotten. He was really hoping that the claims were real, and it wasn’t just some sort of scam… The twelve foot tall jackal wolf hybrid had a smile on his muzzle as he moved right into the locker rooms, finding no one inside as he stepped up toward his usual locker. Slowly taking off his tank top, revealing his heavily bulging muscles and chiseled physique, AnpuRa was very happy with his body, and wasn’t afraid to show off. Mostly, at least. Even with his large biceps rippling underneath the black fur that was on his arms, a lighter color of gray across his chest and abs along with his hands and footpaws, the only part that he was somewhat unhappy with was between his legs. Hopefully, that was all about to change. He couldn’t resist buying from an ad online, a company that sold special trunks that make your bulge bigger. He wasn’t getting his hopes too high. It really did seem like a scam, one of those ads that seems too good to be true. But the price was right, and he was willing to give it a shot, so he had placed the order. He moved to slip his pants off, revealing his somewhat small sheath and balls on his crotch before he put those trunks away in his locker. Getting his bag opened up, he soon had pulled out the special pair, giving them a look over first. They had a bit of a sheen to them, almost like some golden sparkles were in the threads of the fabric, but mostly black in color. They somewhat matched his fur color, and he couldn’t lie that the gold dust that seemed to be all over it looked great. Taking a peek inside, everything seemed normal. There wasn’t anything stuck in there or anything that he could identify as different from his own normal underwear… He was beginning to think maybe they were just normal trunks. There was only one way to find out for sure though. Stepping into them, he quickly got them pulled up, making sure they were snug around his waist before reaching toward the front. Using his paw, he cupped under his bulge, giving it a bit of a lift and making sure it was nice and snug. One thing was for sure, it definitely did show off his bulge more than his usual underwear did. Though, that could just be the way they were cut, with more of a pouch in the front. Moving to put the rest of his things into his locker, making sure his bag and phone and such were all stashed in before locking it up, the hybrid took a few steps over toward the large mirror. He got a look at himself, seeing how his bulge definitely did look a bit thicker with them on… He turned to the side, seeing how his bulge pushed out from his waist, looking pretty juicy. As he was admiring himself though, reaching down to give it a soft pat, he suddenly felt a soft tingling sensation down there. His eyes went a bit wide as he looked in the mirror. He felt that bulge swelling up against his hand, letting out a low huff as he moved it away. He saw it swell out a bit more, getting a bit thicker and wider, pushing out farther from him before it seemed to stop. It worked… It actually worked! He reached down, able to feel his sack and sheath through the fabric, the tingling sensation still lingering a bit but not by much as it started to pass. There was at least another few inches all around on his package as he inspected himself a bit closer, smiling as he did. Immediately, his thoughts went to how quickly they might work. It seemed to happen in bursts so far, no more swelling happening just yet… Maybe it would be best to just keep them on and see what happens as he works out? He didn’t have anything to lose, and all to gain. Giving that bulge another soft pat, and with a renewed pep in his step, AnpuRa stepped out of the locker room and straight out onto the gym floor. Already feeling better about himself just with the start of wearing the trunks, the jackal wolf went straight toward the weight rack to start warming up. Picking up a few lighter dumbbells just to get started and make sure he was warmed up, he started to do a few reps in each hand, flexing his arm each time as he was already starting to work up a bit of a sweat. The trunks definitely felt great for working out, keeping things nice and tight, his bulge staying in place as the underwear was still nice and snug. Setting the dumbbells back onto the rack, feeling ready to really get into it, AnpuRa moved to get some weight from the rack. Going to slide some of the weights on either side of the weight bar, he got ready to do some bench presses. Making sure everything was set and secure, he laid down, going to put his hands on the bar and make sure everything was stable. He even gave a look down, seeing his thick bulge there between his legs, and grinning a bit at that. Taking his time, he started to lift the bar up slowly, letting out steady breaths as he lowered it down and slowly lifted it back up. As he was working on that, another gym member had stopped a second, giving him a look over as he was moving to change machines. The rather athletic lion picked up his water bottle, getting a swig of water while just observing. Getting an eyeful of not just the hybrid himself, but that bulge that was prominently on display. Just a few reps into his set, AnpuRa suddenly stopped a second, letting out a slight huff. It was that tingling sensation again, heavily centered around his crotch. He tried not to let it stop him, slowly going to keep doing his reps without looking down at his crotch. But he could feel it, letting out slightly deeper breaths as his sheath and balls expand in the trunks, getting a bit tighter and heavier. The slight sound of something stretching was in his ears, letting out a deeper huff as he just kept at his reps while the sensation washed over him. If he had taken the time to look at his observer, he would have seen that lion’s mouth wide open, water bottle halfway to his mouth as he just watched that bulge swelling larger. The big cat took a step closer, slowly moving a bit further up and going to just stand at the top of the bench, slowly going to put his water down and moving his hands up as if to spot the hybrid. Of course, he was mostly just using that as an excuse to not get caught staring at the swelling, tightly packed sheath and sack. He couldn’t hide his own gym shorts looking a little bit tighter as well as he looked on. Just as quickly as that sensation seemed to start did it seem to start to dissipate. Doing a few more reps while seeing the lion’s semi-hard bulge just in front of him, the canine slowly put the bar back in its spot with a huff, going to sit up. “Thanks for the spot!” He didn’t say much more, his own eyes distracted as he looked at his larger bulge with a low huff. Definitely thicker and heavier, he had to resist the urge to grope at himself to check. At least double the size it was when he walked into the gym, he couldn’t wait to see it swell that much more. Stretching a bit more as he stayed seated on that bench, he didn’t notice the lion that was spotting him pulling out his phone. He took a quick snap of that bulge before he started to walk away, already looking online to see if he could find the same pair of trunks. If it made the jackal wolf’s bulge look that good, he couldn’t wait to see what it would do for his own… AnpuRa slowly stood up from the bench, first taking the weights off the bar he was using and putting them back before he moved over to another spot, already feeling a bit different when walking. He wasn’t used to having quite this much between his legs, making each step stretch the fabric of the trunks a bit, straining his sheath and balls just a bit more. He somewhat forgot to check if the trunks were supposed to also grow to fit, but considering they were still just as tight as before and not feeling any tighter, he imagined they were made with that in mind. He stepped up just in front of a vertical leg press machine, going to adjust the weight it had set. It took him just a second to get situated on the machine, laying back and putting his legs up against the footplate and getting a hold on the handles before he slowly started to push up with his legs. He got a few reps in, starting to really feel it in his legs some before he suddenly faltered a moment. From this angle, he got a front row seat as he felt the tingling return in his crotch. He tried to keep his breath steady, hearing the soft stretching sounds return as he could feel his balls filling out more, his sheath getting fatter and heavier quickly. Seeing it slowly swelling outward, he lost track of how many reps he had done as he let out just the softest of groans. The sensation was stronger this time, making his soft dick pulse a bit in his sheath as it got thicker still. The trunks were starting to feel a bit too tight, binding up against him a bit before he felt them seem to shift, getting larger just as fast as his bulge was. Getting his focus back, he kept at the leg presses. Each push out and then relax as his knees bent felt like it was adding to the sensation, as if the actual exercising was the thing that was triggering it just now. It was starting to get a bit difficult though, his legs brushing up against the large, swelling bulge each time he bent his knees. He was worried he was going to lose focus and hurt his legs with this much weight, slowly bending his knees all the way again and moving to sit up from the machine. But the second he moved to get up, the sensation started to dissipate again. Not that he was complaining, having to sit up with his legs slightly spread apart as he could almost hear a faint sloshing sound from his now-massive nuts inside that bulge. He panted a bit as he looked over it, unable to resist the urge to reach and slowly rub over that thick bulge between his legs. He took his own breath away with the sensation, giving his fat sheath and heavy orbs a few soft presses and rubs as his length throbbed softly inside. He wasn’t trying to get himself going, but it definitely wasn’t just the trunks themselves. His nuts and sheath were definitely a lot larger than when he started. The entire bulge was around the size of a basketball! All the excitement had really gotten his heart going a bit, and coupled with what he had already done, he felt quite done with working out for today. Moving to stand up, he felt his bulge bounce a bit with his movement, grinning at that sensation. It was something he always wanted to experience, slowly going to take a few steps toward the locker room as an experiment and happy to feel it bounce each time. Stopping for just a moment to stretch out his legs, he was starting to notice that he was catching quite a few eyes. Several of the guys standing around were looking at him, a few of them whispering to each other. He did recognize some of them, having seen them around the gym plenty of times, but there were also lots of fresh eyes focused on that bulge of his along with the rest of his well-built body. It felt nice to be looked at, reaching to slightly cup the underside of that impressive bulge and make sure it was nice and pushed out before he walked past toward the locker room. Eachstep caused a soft bounce of his bulge sending just a slight wave of pleasure through him. It was definitely something he was gonna have to get used to, but was already enjoying and welcoming the sensation as he walked. He could hear some slight whispering from just next to him, turning to look and giving a slight grin to a couple of guys whispering while their eyes were trained on his bouncing bulge before it disappeared with him into the locker room. AnpuRa grabbed a towel as he was heading into the locker room, using it to wipe away some of the sweat on his head, arms and chest before putting it over his shoulder. When he opened his locker though, he stopped for a second. Usually he’d switch out of his workout clothes, but that would include taking off the special trunks… He wasn’t quite ready to do that yet, wanting to keep them on and see what would happen. Bigger would be better, and he wasn’t ready for it to stop growing… Simply grabbing his bag and closing up the locker, he made sure to put the towel in the laundry basket before heading out the door. The sun was starting to go down already, but it was still a pretty nice day out. Especially now, feeling his fat endowments being jostled with each of his steps. He couldn’t wait for the next growth spurt to happen… He hoped it was soon as he turned the corner, heading down into the subway to start making his way home. While he had always gotten lookers before with the way he worked on his muscles, he wasn’t quite prepared for the amount he was getting now. It did feel a bit strange having so many people looking at him as he passed down onto the subway platform, checking the time and making sure he wasn’t late for his train home. He found a spot to stand just next to the wall, leaning back against it and pushing his hips out just a bit. He needed to wait a few minutes, pulling out his phone and going to unlock it as he looked down. While it did look like he was eyeing his phone, he was really looking past it, eyeing his own bulge with a slight grin. It definitely was something to look at. He could understand why others wanted to get an eyeful… Thankfully, the train was on time, arriving a few moments later and coming to a full stop as the doors opened. It looked like there were more people getting on, and the train was already somewhat full. It wasn’t super packed, but definitely more than there was this morning. Shuffling in and having to duck his head just a bit to fit in, the jackal wolf slipped past a few people, finding an empty seat before leaning back and sitting down. He kept his legs spread apart a bit, fat bulge on display as people were filtering in and out at the stop. Pulling out his phone again, he heard the chime signalling the doors were closing as he unlocked his phone. He navigated to the site of the company that sold the trunks, already checking to see what other sizes or things they might sell as the subway started to move. Out of the corner of his eye, the hybrid could see others already looking at him, returning the look with a soft smile before turning back toward his phone. A few of them were definitely blushing as they got their eyefull. While checking the different sizes that the trunks came in, the jackal wolf let out a low huff as he could feel it starting again. This time seemed different though, the tingling was picking up quicker and heavier as he leaned back a bit in his seat. He couldn’t stifle the slight moan as he felt his package swelling again, looking down and watching it balloon out slowly. The stretching sound was much more audible this time, the trunks getting a bit bunched up before they were starting to catch up as well. He had to spread his legs more, moving a hand to sit on the top of that bulge as it got fatter and heavier by the second. He heard a few audible gasps from other people on the train, watching it get so much larger so quickly. His ears twitched slightly, starting to hear an audible sloshing and gurgling sound coming from his inflating nuts. The tapered cock tip of his started to poke out of his sheath a bit from the arousal, showing through the trunks slightly as his entire endowment was getting larger by the second. This was much more heavy than it was before, and only starting to dissipate after it looked like he had an inflated beach ball in his underwear, minus the slight point of his tip. Leaning back a bit more in his seat, he slowly put both of his hands at his side, legs spread wide as he slightly changed how he was sitting to be more comfortable with the added bulk between his legs. As he moved, he could hear the slight sloshing of his seed inside his balls, seeing it wobble just a bit with even the slightest of movement. It was a delicious feeling, like someone was actively jostling his bulge when he moved the slightest amount. The hybrid looked up from his bulge just for a second as the feeling passed, the growth spurt done as his eyes met with a rather thin looking donkey sitting across from him. He had the heaviest blush on his muzzle, one of his hands reached down between his legs as he quickly crossed them and looked away. He was obviously embarrassed, probably a bit too aroused by what just took place as he tried to hide the tent in his pants a bit. There was a similar reaction from some of the other onlookers, several of them a lot less embarrassed than the donkey was. A thick bull that was standing up across from the jackal wolf and to the right just gave a similar grin as their gaze met, even giving a slight thumbs up. A few others were having hushed conversations with each other as they looked, a few sounds of cameras snapping pics being heard even as the subway was just starting to come to a stop. It almost took the hybrid a moment to realize that the doors to the train were opening, so entranced by his massive bulge and the sensation still fading away. As soon as he saw some people starting to leave, he then realized, going to pick up his back and standing up from his seat. He still had to stay leaned down as he walked because of his height, but the first couple of steps were rather slow. Each time he moved his legs at all, he brushed up against that massive package between his legs, causing his balls and sheath to jostle and make a loud, deep sloshing sound from his full sack. He huffed a bit getting used to it, really enjoying even the idle sound of the slight churning and gurgling in his balls. He felt pretty pent up, and the movement and sounds definitely weren’t helping with that. Focusing to try and keep it in check since he was still in public, he slowly took a few more steps before he was out of the train, standing back up straight as his bulge bounced heavily with each step. The added sound of his wobbling package made more heads turn than before, feeling like almost every eye that he passed looked toward him. They didn’t even turn away when he looked back, their eyes almost always exclusively trained on his crotch. It was already a completely different experience than he was used to as he made his way out of the subway terminal, heading back up to the street. Going up stairs was proving to be more difficult than usual, even reaching down to use a hand to try and lift up his tight package out of the way a bit before letting it wobble back into place with a loud slosh. AnpuRa enjoyed the rest of the walk toward his apartment, giving some waves and chuckles at anyone that he passed who couldn’t seem to look anywhere but the loud, huge bulge between his legs. He really was enjoying the attention, and got plenty of it all the way up to the door of his apartment building. Instead of reaching out to push the door open with his hand though, he just pushed his hips forward with a soft huff. He felt his tip and fat sheath press up against the door, deep gurgling coming from his active nut sack as he pushed the door open with his package alone. Chuckling to himself, he was already in the elevator and heading up a few floors to get to his apartment. Fishing the keys from his bag, he got the door open and headed inside. He made a straight path to his bathroom, setting his bag down next to his bed on the way past and shucking the shirt from his chest. Of course, the first thing he wanted to do was inspect himself some more, going to stand right in front of the mirror and quickly put his hands on that bulge. It felt so full, so large. He could feel the outline of his dick peeking out of the top of the sheath, letting out a soft huff as he gave it a bit of a massage. If he hadn’t had other thoughts in mind, he definitely would have already been working those trunks off to give himself a better look. But the better part of him stopped himself, wanting to keep them on and not interrupt any process they were on. They had worked really well so far, and he wasn’t ready to pull them down and off. He just gave his package a slight bat with his hand, letting out a deep huff as he heard the loud sloshing from within and watched it bounce slightly in place. Determined to let things continue, the jackal wolf slowly moved out of the bathroom, going to turn the light off. He hadn’t even realized how long he had taken admiring himself in the mirror, seeing it was already getting a bit late for him. Probably best to head to bed now to wake up early for work the next day. Of course he was going to leave the trunks on as he slept, not even bothering to get into the shower or anything. Turning off the light to his room with a small yawn, he laid down in bed on his back, and drifted off to sleep. _ Snoring away loudly, his exhaustion from his workout and the excitement of the day kept him from stirring, even as he slept the trunks were hard at work in growing that tightly-contained package. Every here and there the jackal wolf would slightly turn in his sleep, moving his head from this side to that and letting out just soft moans under his breath. The tingling sensation was coming and going, leading into his dream where he was already having a good time. Being so pent up and with balls as full as his, the dream was of course centered on the continuing growth of his immense jackalhood. Though, in the dream he was constantly naked, just getting to watch as it got bigger here and there. He was being photographed as a model for magazine covers, being complimented and interviewed on how he got to be so big and more. Deep in sleep, he didn’t even realize what was actually happening. Each new bout of tingling caused him to stir that bit more, the soft stretching sound of his sheath getting heavier, balls getting fatter as the trunks were working their magic. They were still keeping pace, stretching to fit and loosening up each time a growth spurt happened. The fat nuts were churning louder and louder each time they swelled, getting heavier as more mass was put on them. He didn’t have a blanket on him, but soon it sure felt like he had one on his legs as his package was getting large enough to cover his thighs and knees. Even as his sleep waned and his dream got a bit thinner, the swelling continued unabated. The trunks were starting to get toward their limit though, stretching less and less each time the special fabric caused more growth. As the hours passed, it was for sure that the jackal wolf would outgrow his underwear. Like a loud, sloshing, gurgling and churning time bomb, his package just kept getting larger and larger while he enjoyed the lewd dreams focused on the sensation. It would be for another hour or so after the trunks had stopped stretching, now at their limit, before the bulky hybrid would finally wake up from the sensations to find just how well the trunks were working on him… _ It had only been a few hours since AnpuRa laid down to sleep, slightly stirring a bit as he was laying on his back. Usually he slept pretty soundly, but there was an extremely tight feeling around his crotch, pulling him away from his sleep. He opened his eyes groggily, looking down at his crotch and moving to put a hand on it. His eyes blurry, he was still trying to wake up and see when he started to tug at the fabric a bit, only to find that he couldn’t. It wasn’t until his eyes focused that they went wide, letting out a deep huff at what was before him. The deep tingling came back in that very instant, seeing his extremely massive, almost bed-sized bulge between his legs. His hands went to it, letting out a low huff as they slowly rubbed over it some, the tightness only increasing more. He was still growing, but it almost felt like the trunks were at their limit. He could feel them digging in against his sack and sheath, letting out a loud groan as it squeezed over him more. Loud, heavy gurgling, churning and sloshing filled his ears as the bulge moved with his touch. Raising up his legs a bit, he panted loudly as he could feel his cock pulsing, his balls so incredibly full and pent up. The wall was completely obscured from his vision, seeing nothing but a giant bulge with a very prominent tent of his tapered, canine dick trying to push out. Soft moans escaped his lips as it was just getting tighter and tighter, the sounds of hot cum bubbling in his balls and almost audible throbbing of his needy dick. Even the slight movement of trying to sit up made him groan, his hands going to reach for the band of the trunks and trying to tug at it. It was too tight, and he was starting to hear louder stretching noises. He saw it tear some, revealing the light grey fur on his sheath a bit, letting a bit more of his dick slip out of that fleshy prison. He was absolutely massive. The size of his sheath and sack were probably just as large as he was, bundled up in the trunks as they were reaching their limit while still doing their job. The tearing was continuing, sheath, balls and cock still growing as the tingling continued even though it was starting to feel a bit uneven and dissipating. The jackal wolf had no idea what was going to happen, or what to do. He couldn’t get them off, and he couldn’t stop the pleasure, the need. He was getting hard in his sheath, his dick trying to push out more and just tearing the trunks more. The sounds of the threads popping and stretching was continuing as the tingling stayed present, everything still swelling larger by the second. Deeper groans left his lips as he could hear the soft churning in his balls, trying to reach his hands down to give them a slight jostle and making his entire package wobble. The sloshing was loud and constant as they moved, almost like when you roughly move a water bed. It had a distinctly deeper tone though, his cum being so much thicker than water. It felt like someone had stuck a hose in his cock and pumped his balls up that much more, now overfull and aching for release. More and more distracted as it kept swelling, he was soon having problems reaching around toward the sides of the bulge. More snaps and rips filled the air as the trunks were giving way, feeling the cold, night air now up against his bare sack and sheath in places. He knew it wasn’t going to be long now, huffing and groaning as his cock ached, wanting free and to spring out of his sheath. He hadn’t even thought that far, of how long his shaft actually would be once it was free. If he could even reach at it or stroke it enough to cum or if he could even fit in normal places anymore. It was all muddled by the growing lust, starting to actively rub and stroke at himself through the underwear as it was being destroyed. Swelling more and more, the tightness against his tapered tip was becoming too much. Groaning and panting loudly, he almost whimpered as he reached at the fabric himself even to try and help tear through it. He wouldn’t need to help too much more though, letting out a loud gasp as suddenly the fabric snapped completely. It ripped off his waste, tatters on his bed as his length was now free. The fat, immense ebony cock shot free from his sheath like it was spring-loaded, shutting his eyes at the pleasure. The next thing he heard was loud crashing, something crumbling around his cock as dust seemed to fall down onto him and that pulsing length as it stood proud. When he opened his eyes, they went wide as could be as he reached out with his hands. His cock was definitely much bigger than he was, and was currently lodged halfway in the ceiling. It had broken through into the next floor of the apartment building, already spurting out jets of precum and starting to fill the room above. Moans and huffs were all AnpuRa could manage, so needy and lustful as he tried to stroke over his cock as best he could. His balls churned and gurgled loudly, slightly sloshing from his movements as he tried to jerk off the cock that was helplessly large for his hands to have much effect. Shoving his hips up, he heard the slight crumbling as he slid his cock higher into the hole in the ceiling before relaxing back, thrusting up and starting to slowly fuck his ceiling as he could hear yelling above him. AnpuRa completely ignored the yelling and noises from upstairs, grunting and huffing as he kept thrusting up, rubbing at his length with wild abandon as he could feel his balls starting to tighten. He needed this orgasm. He couldn’t stop. He had to empty his balls as they ached and gurgled, so full and heavy. Leaning up and trying to wrap his arms around his dick as best he could, he squeezed at it, pressing his chest and abs along it as he still thrusted up. He even moved to lick along it, adding to the pleasure as he could feel his peak getting closer and closer. As the extreme rush of his orgasm hit, he let out a long, deep howl as his balls clenched, cock bulging out even more as he could hear each powerful shot of the thick, virile seed firing up his cock. He could hear the loud splashing, glorps and globs as his seed was flooding the room upstairs, some of it leaking down onto him from the hole above. But it wasn’t just a few strong pulses and stopping, it kept going and going and going. He was in a daze, stuck there blowing an immense load. Loud sounds of rushing fluid hit his ears along with the heavy sloshing as his nuts clenched tighter with each pulse, each new shot of spunk adding the flooding above him. He could hear it against the wall outside, starting to come into the hallway above and not just the apartment. But he couldn’t stop, and wouldn’t want to even if he could. He just held onto his length and rode out the most powerful orgasm of his life. It felt like he spent hours there, clutching onto his dick as it fired out the cum from his humongous balls. His shaft and sack took up most of the space in his room, and was firmly lodged into the ceiling. Even as he was coated in his own juices leaking through the hole, he stayed fast, enjoying the pleasure of unloading such a massive load from such an enormous cock pulsing strongly. By the time he finally finished, he could hear cum rolling down the hallway and stairs outside. It had flooded the apartment completely, drooling out of the window and down the outside wall and getting into most of the other rooms upstairs, as well as down the stairway all the way to the bottom floor. As he came down from the high, the jackal wolf had half flooded his room as well, looking up to see more of his fresh seed still leaking out around the hole and his length. But he didn’t feel that satisfied. He felt like he could get another load out as he heard his balls gurgling and churning already, working quickly to get another flood of cum primed. Leaning back onto his bed, his mattress squishing under him as his fur was completely matted in his own sticky spunk, he panted softly and caught his breath. His length still pulsed proudly, rock hard and semi-plugging the hole in the room. But the only thing he could think about was how great the trunks were. “Mmh… Fuck yeah… Maybe one more round, and then I’ll order the largest size…”