An Unusual Purchase - Part 3 (Commission for RezRaz)

TAGS: Inflation/Gas Inflation, Helium, M/M, Explosive Finish, Room Filling

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Almost as if by design, however, something about the canister itself provided the perfect outlet for their very specific needs, though it took until the next day before they were properly ready to indulge in some proper experimentation without having to worry about their bodies collapsing from the strain. The house was clean, the outside was clean, there was only a faint, residual smell that was easily covered by some incense candles, and right after the two of them had a hearty breakfast, Za’Vark and Niz sat down in their living room and started trying to understand just what exactly that canister even was. Most of the message were written in foreign languages that neither of them were fluent in, and judging from the poor translation on the one tongue they did speak, probably wouldn’t be too useful either way; most of what they could understand were typical warning labels and simple instructions, the latter of which they really didn’t need anymore.

It was dumb luck that gave them a breakthrough. Niz was playing around with the nozzle when he noticed that it wasn’t screwed on as tightly as he thought it was; or rather, it was designed to twist and turn without being removed, with a small, nearly imperceptible click letting him know that what he was doing was actually switching between two entirely different positions in some kind of internal mechanism: turn to the right, and it would click once, turn to the left, and it would do so twice. A more detailed examination of the labels revealed that this was probably what the instructions were referring to when they mentioned a “local” and “global” setting, though what exactly that actually meant in practice was still up for discussion. Niz wanted to put that thing back in his mouth and give it a try, while Za’Vark insisted they try to make sense of what the broken English was attempting to say, but in the end, they both knew they’d end up picking the former option; not only because it was the only way to be sure, but mostly because any resistance the Sangheili put to practical experimentation was token at best. He really just wanted to see Niz bloat up again.

And bloat he did, though not in the way either of them were expecting. Placing the nozzle in what he presumed was the correct position, the smaller of the two roommates put it in his mouth and opened the pressure valve just enough to let a thin trickle of the gas through; just like before, he felt that wonderful sensation of fullness… just not in his lungs. Or even on his body. Rather, it was all focused on and inside his head, leading to a very odd sensation of lightheadedness that came accompanied by a distressing amount of clarity, making for a somewhat paradoxical sense of self that left him unable to respond when his mate asked him what was going on. Just seconds after Za’Vark did so, however, the answer came into full view, when Niz’s head began to swell up in every direction, just like his body had the day before. Except, well, it was just their head.

The effect was comical, to say the least, at least after the initial shock passed and the Sangheili began to truly take in what he was seeing: there, staring at him with the most hilariously sheepish expression stamped on their expanding face, was Niz, their body just as tiny as it always had been, and yet possessed of a head so egregiously oversized compared to the rest of his form that there was no way Za’Vark couldn’t break out into hysterical laughter. The Kig Yar’s protestations didn’t help, considering they came in a tone so squeaky that he might as well be huffing helium, couple together with a blush that, thanks to the size of the cheeks it was on, looked practically cartoonish; as much as Za’Vark would’ve loved to keep his composure, it just wasn’t possible, and though he broke out into frantic apologies, he had to do so in-between long bouts of cackling and prolonged periods of wheezing where he struggled to breathe.

That said, it wasn’t all bad. Though the growth was mostly concentrated in Niz’s head, a sizable chunk of his body went in much the same direction, though not nearly as grand in scale. It was almost like the swelling had “spread” from the localized inflation area, giving his shoulders, the top half of his torso and even part of his arms a little extra bit of size, making him look like he was either about to take off towards the sky or topple over from how unbalanced they were. Za’Vark had to work hard to keep his giggles in, even after he grew used to the sight; at the very least, this was evidence they could control the macro gas’ effects, even if to just a limited extent. It was valuable information, and neither of them could deny it.

Sadly, he was still too busy trying to stay serious to really notice what his mate was doing; all it took was a momentary distraction on the Sangheili’s part for Niz to surreptitiously remove the nozzle from his mouth and aim it squarely at their roommate’s claws. Surely, if the gas was capable of inflating specific parts of one’s body without (apparently) going through the lungs, then it wouldn’t need to be inhaled, merely applied; that was what Niz was thinking of, at least, and though initial results weren’t actually that great, all it took was a couple of seconds of holding that nozzle in place for the first few inches to be added to the Sangheili’s hand. Singular, because obviously things just couldn’t go according to plan and had to go awry at the first possible opportunity.

The Kig Yar had expected the effect of the gas to be symmetrical, though why exactly he assumed that spraying the outside of one claw would affect the other was anyone’s guess. Instead, what he got was Za’Vark’s right set of claws suddenly filling up in an oddly proportioned way, almost like they were literally being puffed up with air for a few moments before returning to the dimensions they were supposed to have. The Sangheili himself only noticed after it was too late to do anything about it, and by that point the sensations had already creeped up the nerves in his arm and straight into the pleasure centers of his brain; Niz might have been slightly inoculated against them, but to their partner, this was an entirely new experience. All he could do was lie flat against the ground for a moment or two before squirming, holding his arm up so he could see as it swelled and bloated beyond recognition, just before “settling” back into a familiar shape, a cycle that repeated itself a couple of times before it was finally over and the Sangheili ended up with one side of his body being disproportionately larger than the other.

Much like Niz’s headflation left him with residual growth in the parts of his body directly adjacent to his big dome, so too did the gas applied to Za’Vark’s right hand also affect the arm attached to it, as well as a portion of his right shoulder, with just the smallest bit heading down into his torso proper. It made him feel like a proper monster, with the instinctive need to swing that thing around and destroy something welling up inside of him as he recalled the many times he and Niz had indulged in those kinds of macro-size fantasies. But there was something better he could be doing, something that would pay off a hell of a lot more than just smashing the nearest bit of upholstery, and it had to do with the very same thing that gave him a colossal arm in the first place.

With a single, swift movement, the Sangheili took the nozzle from his mate’s hands, much to their ineffectual protest. It was odd, picking things up with an oversized cluster of claws that didn’t really close properly until he really started to exercise them, but he managed; what mattered was that the gas could clearly be applied to specific body parts without needing to pass through the bloodstream (somehow), and if that much was true, then the applications and possibilities were only limited by their own imagination. The two of them could even mix-and-match with one another, growing in oddly complementary ways that would serve no practical purpose other than to heighten the pleasure they would surely be indulging in within a few short moments; Niz’s head might’ve drawn plenty of giggles from their mate, but bring claws and paws into the equation and suddenly things took a very different turn indeed. Well, that, and the fact that it was almost too easy for Za’Vark to pin the Kig Yar down with his massive hand and arm while using the other to generously spray his partner’s junk with the macro gas, giving him about the same kind of dosage that he himself had received; if that made Niz’s cock grow at least as much as his arm did, then he’d consider that a job well done.

Niz himself wasn’t going to stop him either, even if he did try and pretend like he didn’t want to go through with it and the two of them should be more cautious, a horribly-acted piece of theater that immediately fell to pieces the moment the Kig Yar felt his shaft and nuts begin to bulge outwards, a loud moan escaping his lips in a register far deeper than his previously high-pitched tone. Whether it be because his body was adapting or the sensations coursing through him were just that powerful was anyone’s guess; what mattered was that the Sangheili got exactly what they wanted as Niz’s package swelled and bloated with additional size, the gas forcing more and more air to be pressurized inside of them despite the lack of any obvious source, not only leaving the “smaller” of the two males with an egregiously oversized cock and pair of nuts that kept on growing far past the point where Za’Vark’s arm had, but an apparatus that was harder and more turgid than it ever could be naturally, with the air pressure within all-but ensuring that it’d have no give whatsoever. Ten seconds were all that were needed for Niz to go from perfectly normal-sized to have the tip of his vein-covered manhood push up against the ceiling, and both orbs pulsate and throb with each heartbeat as they took up a significant amount of space in the middle of their living room; Niz himself was left with his eyes rolling upwards into his skull and his tongue lolling out of his enormous mouth, hot breath escaping him in plumes that were just slightly visible in the cold winter air.

It’d take a while before they came back to their senses, leaving Za’Vark reasonably safe in the assumption that he could get away with doing anything to that cock with impunity, and what he truly wanted to do was hold onto it and hug its full size just like he had the day before. He couldn’t help himself, it was stronger than him; the memory of being stuck to a dick so big that his entire body barely measured up to half of it had activated so many buttons on his control panel that he couldn’t even think straight whenever he recalled those magical moments, reduced to little more than an animal conditioned to seek out their next serotonin hit. And while Niz’s shaft wasn’t as big as it had been the day before, it was certainly big enough for their mate to once more stick to it and start grinding his entire body against it, moaning loudly enough for the neighbors to hear all the while. Plus, while he had free access to that colossal pillar, Za’Vark could very easily lose himself as he drooled all over it, his mouth opening wide to slobber over as much of the shaft as it possibly could, leaving the Sangheili unable to really think of anything other than tasting even more of it.

It was hard for him to believe that this wasn’t a dream still, not even after spending hours cleaning up all the cum that had covered their apartment after the two’s first giant-sized encounter. It was too good to be true, in a way; a quasi-magical, unexplained gas canister that turned them into bigger versions of themselves and could selectively work on just specific parts of their body by turning a level? That was the sort of thing one saw in terribly-directed porn flicks with horribly constructed and obviously fake-looking props, not anything remotely decent or halfway related to reality. Yet there it was, right in front of him, happening in real-time, with the extra size giving that pair of nuts an excuse to start overproducing again, and very quickly bringing poor Niz to the brink of orgasm, a place from which he wouldn’t return any time soon given how eagerly and energetically Za’Vark was rubbing himself over their junk; it was the Sangheili’s job at that point to ensure that his mate could appreciate his size boost as much as possible, especially given that it was going to end up as a prelude to both of them completely losing control of themselves.

For the time being though, there was no reason for him to be thinking about anything other than the gentle creaking and low, churning roar of the cock he was hugging and the cumtanks underneath it, respectively. It played into so many of the couple’s kinks that it was hard to really explain just how much it worked for them both, even if Niz was in no fit state to even think about it; the Kig Yar’s mind was just too overwhelmed by what he was feeling at the time, given that his brain hadn’t grown in proportion with his package, leaving him with pitifully insufficient processing power to deal with the sensations being fed back to him each time his mate decided to squeeze down harder than before, or move their extra-large hand and arm over the full length of that rod, pressing their index and thumb in a ring to really stress-test Niz’s resistance and stamina. They wouldn’t get good results out of that; with his body being so heavily disproportionate after being given two localized gas infusions, the Kig Yar couldn’t even tell which part of his form was which, let alone comprehend what was going on with it, leaving him entirely at the mercy of his sensory nerves, which might as well be completely frayed from how sensitive they were.

Thus, it didn’t take too long before the first rope of cum splashed against the ceiling, falling back down on Za’Vark to cover him from head to toe. It was impressive how much Niz could produce when so much of that growth was basically just air, but their mate wasn’t going to start asking questions about how this was even possible; what mattered was that each of the Kig Yar’s ropes of spunk were thick enough that Za’Vark could properly dunk his head into them and still have some room left, and were jettisoned with such strength that they began scraping chunks off the ceiling. It was indeed a prelude, and one that should’ve warned the two about the damage they were about to inflict upon everything around them, but as soon as the first drooping ropes of spunk began to fall on top of him, the Sangheili ceased caring; what mattered at that point was extracting as much pleasure as he could out of that encounter before the two of them were inevitably kicked out of their apartment for making a mess of it, and whatever happened from there on was future Za’Vark’s and future Niz’s problems. In the present, self-indulgence was the name of the game.

This did, however, leave the door open for the disproportionate Kig Yar to turn the tables around, since his mate was now too busy rubbing himself over a shaft bigger than they were to really pay attention to anything else around him. It did take a while before Niz found enough of his conscious self to put together something resembling awareness, and even then his mind was slow, his reactions sluggish and his eyes barely capable of opening. He could still feel his pleasure centers being assaulted from every direction every half-second or so, but somehow found the willpower to plow through it, almost like filtering it out and turning it into background noise. It wasn’t easy, far from it actually, but there was something there in front of him that he had to grab onto and use: the canister.

It was just sitting there, waiting to be used, discarded and forgotten by the Sangheili riding his dick as if it weren’t the single most important thing they now owned. Niz wasn’t even thinking about saving up for the future or even how much there was still left in there; as far as he cared, the “buy a new one” solution was still firmly on the corkboard if they had to use it, so why bother holding back? It’s not as if they destroyed anything, they just had an unfortunate flooding incident that was perfectly resolved once and thus could be resolved once more if need be; sure, their neighbors would be so pissed as to probably call the police, but what were they going to do, wrench two lovers apart in the middle of intercourse when they were both the size of a building? They’d be lucky if they could look at them and not immediately want to drop everything and join them, let alone do their jobs properly.

This was, at least, what Niz was thinking when he grabbed the gas tank and tried to find the nozzle in between grunting from the stimulation and moaning like the size slut he was, having to hold back the desire to call for Za’Vark’s name and beg them to go even faster. There would be time for that later; now he had to get that nozzle in his mouth and give himself an extra-large dose of the growth juice while he still had the mental fortitude to formulate plans. He made sure to swap the mode out as well; as much as it served to break the ice, Niz wanted his whole body to grow outwards, and could only hope that giving himself a “global” dose would help to normalize those weird proportions he found himself with. With a final wince and a long, half-moaned exhale, the Kig Yar placed the hose in mouth, closed his lips over it, and then turned the valve to release the gas within.

Almost immediately, he was filled by the same warmth that heralded his previous growth spurts, almost like his body had acclimated to the overuse of it and began to process it at a much faster pace. Or at least, that’s what Niz hoped was the case; if there was one thing better than growing to become gigantic, it was growing even faster than before, preferably in a way that could be made to spiral into an exponential process that was fully outside their control, really play into the size fantasies and complete loss of agency when it came to one’s size. Soon enough he’d be towering over his partner, over his home, over the apartment building it was placed in, and who knows what else, and all he had to do was keep taking long, deep breaths from the canister to fill his body with the miraculous, almost-certainly-illegal gas.

With Niz’s body inflating once again, this time directly beneath him, it was only a matter of time before Za’Vark began to notice what was going on… though it’d take longer before he could will himself to care enough to act on it. There was a much bigger part of his brain that wanted him to just go with the flow, to accept the growth as a fundamental part of their new life together and stop worrying about such insignificant things as property damage or public disturbances. Other hypers did that all the time and they didn’t get censured for it, so why should they? Just because their method of growth was artificial? Utter nonsense really, hence why the Sangheili happily ignored the budding giant swelling underneath him as he directed his attention fully to a cock that had resumed bloating, giving him a fantastic distraction to occupy himself with.

So, with no one there to stop him, and his mate more than happy to ignore it, why not keep going? Those were the words that kept ringing within Niz’s head: “why not”, repeated over and over again as he kept huffing more and more of the macro gas, welcoming it into his body far past the point where he should’ve stopped and done something about his physical frame suddenly being too big to be contained by the two’s apartment again. One foot against the wall, the other having broken through the front door and showered the corridor outside in bits of wood, distant yelling as the neighbors that saw it happen began to alert everyone else in the building as to what was happening. Soon, the police will be there and bad things would probably happen, but neither of them really bothered themselves with that; Niz especially was far too concerned finding new and more efficient ways to express how much pleasure he was feeling by way of making noises that could charitably be described as “undignified”, finding it increasingly harder to keep the nozzle in his mouth without accidentally slurping up the whole canister in the process. This went double after one of his arms had to be moved through an inner hallway and into their shared bedroom, just a few seconds before the hand on the very end of it smashed through their wardrobe and had to start pressing against the wall.

Niz couldn’t even fathom what his body might look like if seen from above, contorted into weird positions as he outgrew his apartment and strained its ability to contain him. Rubble was beginning to fall from the ceiling, bits of plaster were being ripped from the walls each time he tried moving, and the whole structure groaned and creaked in protest the more the Kig Yar partook of the macro gas, uncaring about the consequences. He wanted to keep going, he wanted to outgrow his apartment and become larger than anything and anyone he’d ever met, he wanted to indulge until he could do so no longer; thoughts of popping or bursting or more mundane threats such as arrests or fines didn’t strike him as something he should be wasting brainpower on, and thus Niz kept on breathing on that increasingly sweet-tasting growth agent, taking care not to accidentally swallow the hose or the whole damn canister either.

It was around this time that the Sangheili riding him began to take actual notice of what was happening around the two, mostly because a particularly large chunk of the ceiling landed on his head and showered his shoulders in small bits of wood and what looked to be powdered concrete, however that came to happen. It triggered an immediate fight-or-flight response that he had to consciously push back, having convinced himself that he was actually pretty safe if only he kept holding onto his now-giant mate… an illusion that was shattered as he became fully aware of how loudly the whole building was collapsing around him. He tried looking back to alert Niz, to let him know that he should stop, only for his eyes to go wide as he realized that not only did the Kig Yar probably know already, but given the wide smile stamped on his lips as he breathed in the macro gas, he was most likely doing it on purpose too!