Tiny expedition

Fairly early in the morning, Chomper strolled through a field, following a relatively new friend of his: Scratch. He was a fairly small T-rex, like Chomper, though was a few inches taller and had greenish-brown skin, in contrast to Chomper's own blueish body. Scratch shared Chomper's chubby build, and also had a birthmark; a short, near-vertical line between his eyes, that looked like a scratch, hence his name. 
The two had come out here today because Scratch wanted to look for rare plants, and Chomper asked to come with him. So, here they were; nude, as neither had felt like getting dressed, and wandering in a field near Scratch's home, occasionally stopping as Scratch pointed out some interesting plants, typically using terminology that went completely over Chomper's head. Chomper didn't mind, though, he was happy his friend was having such a good time.
Eventually, Chomper happened to notice an odd flower that Scratch had overlooked. "Hey, Scratch, what's this one?" Scratch came over, and his eyes lit up. "I...Don't know! I've never seen one like this before!" With a wide grin, he knelt down to investigate, and Chomper followed suit. The flower in question was a pale blue and almost seemed to be made of opaque crystal, reflecting light all around it. It had 5 leaves angled in a sort of star pattern, around a tall middle section, and...That seemed to be all there was to it. It didn't even have a visible stem.
All things considered, it didn't seem to even be a real plant, and Scratch started to doubt that. "...Actually, this is probably just some weird crystal someone carved and ended up losing." Chomper shared in his disappointment. "Man...Well, we should probably try to find who owns it, they must be pretty mad about losing it." Scratch idly ran a finger along the central part. "Might be kind of a pain, with how this-"
fwumph! The raised section of the flower suddenly opened up, launching out a cloud of spores that coated each dino's face! Both of them coughed and wiped away the spores, and Scratch became excited again. "It really is a flower! Oh, I have got to figure out how to safely transplant this thing..." He started inspecting it some more, until Chomper spoke up. "Hang on, um...Wasn't it smaller than your hand, before?" Scratch paused for a moment, seeing that the flower had indeed gotten bigger, and was continuing to do so. Except, just a moment later, he realized it wasn't that the flower was getting bigger... "H-holy crap, I'm shrinking!" He wasn't the only one, as Chomper looked around to see if he'd been affected as well, quickly finding that, even fully standing up, the grass was noticeably closer. "Oh my god, so am I!" They both panicked, but there wasn't a whole lot they could do, and about 20 seconds later, the shrinking finally stopped, leaving them each only a few millimeters tall, though with Scratch still being slightly taller than Chomper.
Both looked up at the grass now towering over them. "...What do we even do, now?" Chomper wondered aloud. Scratch wasn't feeling quite as defeated, however. "Maybe it's not all bad, I can get a really good look at the plants, now!" Chomper wasn't too happy about how little Scratch seemed to care. "Seriously? We don't know if this is permanent, and that's what you're interested in?"
"I just think we ought to make the most of it. If it's temporary then it won't matter much what we do, and if we need to do something to reverse it then I can't imagine it'll matter how long we take."
"What if it does, though? I'm not getting stuck like this just because you preferred looking at plants over figuring this out!"
"Try to calm down, alright? There's no way this is irreversible, I guarantee it. How about we make our way back to my house? I'll get a chance to check out some plants from really close up, then when we get back I can look up that flower and find out how this can be fixed."
Chomper sighed. "...Fine, but if this becomes permanent because of you wasting our time, I'm gonna be pissed."
They set off into the forest of grass, Scratch now clearly the only one enjoying himself.

Almost an hour later, with Scratch occasionally needing to be reminded to keep going, the two finally arrived at Scratch's backyard. Chomper was pretty frustrated at this point, both at Scratch for delaying them so much, and the long trip itself, his legs starting to get a bit sore. "Great, we're here. Now it's just another damn hour to get to your phone, or computer, or whatever. We better not need anything from that plant to get back to normal."
"It'll probably be tough to get at any of that, but I've got something in mind, pretty sure we'll be fine."
"Well, I'm taking a break, my legs are getting tired." Chomper sat down in the shade of a bird bath.
Scratch laughed a bit. "Taking a break? What happened to getting this over with as soon as possible?"
"Ugh. Look, just...Give me a while. Go look at plants or something."
Unknown to either of them, the bird bath far above had a slight leak, a bead of water slowly forming directly above Chomper. Scratch looked at him for a moment, not quite feeling the best any more. "Hey...I'm sorry I got us into this. I'm gonna do everything I can to get us back to normal."
"Oh, you're only starting now? Should've known, you did waste a lot of time checking out plants."
"You know that's not what I meant by that! I don't want to be stuck being so small either, I just keep getting distracted."
"Pft, you sure do get distracted. There's a chance this can't be reversed, and you're just like 'OoH, lOoK aT dAt FwOwEr!'"
"Ugh! Look, if you were turned into, like...A fish, or something, you would want to take a while to explore, wouldn't you?"
"Yes, obviously, but only after I'd found a way to turn back!"
The water drop above finally dislodged, falling down toward the two arguing rexes, then...
Splut! It fell directly onto Chomper, absorbing him into it while clipping Scratch and sending him sprawling onto the ground, the drop itself bouncing a distance away onto a raised section. Quickly getting back to his feet, Scratch looked up to see the water drop holding Chomper resting on a few leaves. "CHOMPER!" He tried to scramble up to them, but couldn't get a good grip on the dirt wall. "D-damn it, give me a minute!" He took off running around the raised part, looking for an easier way to get up.
Chomper kept a tight hold of his breath, cheeks puffed as he tried to escape the water drop. It was rather small, barely wide enough that if he were floating horizontally he could avoid touching any part of it. This made it fairly easy to beat on it, which he did. Punching against its edges, pushing them, stretching it upwards, nothing worked. The leaves the drop had settled into had a somewhat downward curve, so he couldn't even get it to move any significant amount. His only real option would be to wait for Scratch to reach him, hoping that it wouldn't take too long.
It took a couple minutes, with Chomper's lungs beginning to complain, but Scratch finally managed to find a feasible path, running over to the drop. His view of the inside was heavily distorted, and so was Chomper's view from inside, but Scratch could still tell that Chomper was pressing against their watery prison, bulging it toward him. "SCBLRATBLCH, GEBLT MBLE OUBLT!" "Um...Hang on, I'll figure something out!" Scratch said, and started hitting the water drop. It wiggled and deformed, further distorting both dinos' view, but stayed intact, so he tried harder, now slamming it with both hands. Still, no result. If the drop was going to break, it would need more force than this... The place it was being held in was fairly close to the edge of this raised area, and the drop itself seemed fairly light. "Alright, I'm gonna try to roll it off the edge, maybe it'll break!" "Hblurrbly ublp anbld dblo iblt!"
With more effort than he expected to need, working against both the drop's weight and gravity because of the slight slope, Scratch managed to slowly get the drop moving. It took about 20 seconds, but he finally got it to the edge. Chomper couldn't really see that, though he did notice part of the drop was starting to sag down, and heard Scratch yell "Get ready!". One last shove, and the water drop fell from the leaf. It was an odd sensation, essentially falling while underwater, but it only lasted a moment before the drop splatted on the ground, unfortunately staying intact. The momentum smacked Chomper against the bottom, forcing out some bubbles, then he sat up and quickly realized he was still trapped, throwing his arms up and grumbling in frustration. Scratch was pretty annoyed as well, and was safe to be more vocal about it. "God damn, come on!"
Just after, as Scratch was thinking about what to do next, a breeze came by. Normally it wouldn't matter, but as he was so small, it had some pretty significant effects. The leaf he was standing on shifted, sending him off balance...And, having been looking down off the edge to see his previous strategy had failed, he ended up falling from it! "Shit, SHIT! HUUUP!" Heading straight toward the water drop, he grabbed a deep breath in case he'd end up inside it.
Shlip! Which he did. Again, Chomper was slammed to his back, this time from Scratch landing on him, and the two bubbled in both surprise and pain. They were momentarily dazed from the impact, but quickly recovered, Chomper giving Scratch a look of more annoyance than fear. "Webll, geblt ofblf mble!" "Rbl-riblght, soblrry." Scratch got up and helped him to his feet. 
"Sblo, noblw whblat?" Chomper blubbed. Scratch took a moment to think, some bubbles trickling from his nostrils. Both of them being in the water drop meant there was barely enough room for them to not press against each other while also not touching an edge. That in mind, Scratch bubbled out his first idea. "Iblt miblght spblit iblf wble stblretblch iblt, shbloulbld ble eablsy frblom thblere." With a nod from Chomper, both pressed on opposite sides of the drop, slowly stretching it out to the point that other parts of it began pressing against them. They got a surprising amount of distance, but eventually Scratch's hands slipped, the drop forcing him back as it abruptly returned to its previous form. Chomper didn't notice straight away, finding that it was suddenly much easier to push, before being hit by Scratch being launched backwards. "HMGH!" Both spurted some bubbles, their cheeks bulging for a moment, and were knocked down again. "Oblw...Okblay, thblat wobln't woblrk." Scratch muttered, the two getting up once again.
"Mmblbl..." Chomper was starting to strain, from both the exertion of struggling against the drop and the extended breath hold. He puffed his cheeks a bit bigger in response, which Scratch quickly noticed. "Hblang ibln thblere, Chblompbler, Ibl'll...Thblink oblf soblmetblhinblg elblse," he burbled, trying to reassure them, though there didn't seem to be a whole lot of options. Still, Chomper remembered something about Scratch's backyard. "Wablit, yoblu hblave abl poblnd! Iblf wble robll thblis inblto...Mmngh..." He didn't finish his statement, deciding saving his breath was more important for now, but Scratch still understood. "Oblh! Iblt wobluld meblrge wiblth thble wablter, anbld wble cobluld swblim oublt!" While he could barely see outside, he could still manage to make out the bird bath, and had an idea of what way to go, but... "Oblh gobld, thblat's...Acblrosbls thble whblole yablrd!" At their new size, that short distance may as well have been miles! They could both hold their breath a surprisingly long time, but would that be enough?
With Chomper's chest heaving, and Scratch starting to feel the need to breathe, they had no time to waste. Pressing against one side of the drop, Scratch motioned for Chomper to help push. "Prblettbly sublre itbl's thblis wably." And, off they went, fairly slowly. They were kept close together because of how small the water drop was, and would often bump each other, but they put up with it. Nothing really happened over the next few minutes, other than the occasional bubbling and breathless grunts, mostly coming from Chomper, that slowly became more frequent. His cheeks were beginning to swell further as well, getting close to the size of his own head and sometimes being unintentionally brushed against by Scratch. "Mgh, hmmblp!" As much as Chomper had been trying to ignore his need for air, it was getting pretty hard to do so, and he'd started blushing from it. "Yoblu okblay, Chblompbler?" Chomper nodded. "Fbl-foblr noblw."
Another minute, and both dinos were clearly struggling, but Chomper moreso, his blush beginning to tint purple as he started losing his composure. It may not have been all bad, since he was getting aroused from holding his breath so long, but it wasn't worth it. "Hmrk! Blublp-mm!" Bubbles burst from his lips and he covered his mouth with one hand, tightly shutting his eyes and still trying to push the drop with his other hand. Scratch, of course, wasn't just going to let him suffer. "Chblompbler! Hblere, tablke mbly aiblr!"
Opening his eyes just a bit, Chomper took his hand off his mouth, quickly having Scratch's lips press in its place. Carefully inhaling, his lungs slowly relaxed as they were refilled with already rather stale air, but even this was better than nothing. Reasonably satisfied, the two pulled back, Chomper's blush having gone back to red, while a blush also formed on Scratch's face, he too starting to strain and get aroused. And, with no real other options, they just went back to pushing the water drop they'd been stuck in for almost 8 minutes at this point.
On and on they went, praying that they were going the right way, but having no sign of whether they were. Nothing eventful happened for a while, and soon they'd been trapped for 11 minutes. Scratch and Chomper were both visibly and audibly struggling now, blushes going to purple as their bellies jiggled with the convulsions of their chests. Their arousal had continued to build in this time, getting each of them fully erect, their dicks occasionally poking the side of the water drop. Both dinos glanced at each other for a moment, cheeks as big as their heads, and Scratch tried again to reassure Chomper. "Mm...Cbl-cabln't ble -mm!- m-mublch fablrthbler!" It hardly mattered what he said, both of them were getting fairly close to drowning, with pained moans, involuntary burbling, even the occasional twitch of their fingers.
13 minutes in, their now-blue cheeks were about a foot and a half wide relative to their size, and despite both rexes covering their mouths, the bubbling was now a constant thing, a harsh burning in their lungs. Each one's dick was aching, throbbing heavily, causing involuntary muffled moans of pleasure each time it would rub against the drop's edge. Chomper gave up on covering his mouth, figuring that doing so wasn't accomplishing a whole lot, and started to masturbate with his newly freed hand. That was actually more helpful than covering his mouth had been, providing a slight distraction from his dire lack of oxygen. Scratch noticed this, but chose not to follow suit, trying to stay focused on pushing, though he'd started shivering from needing to breathe so badly.
Fairly soon after that, 14 and a half minutes without fresh air, Chomper stopped for a moment, his arousal passing the point of no return. "Mmmnnblurburblrbl..." Bubbles streamed from his lips, deflating his huge cheeks, and he started cumming into the water. On the first spurt, he involuntarily gasped in pleasure, before instantly realizing his mistake and coughing up the water he'd sucked in. "Huu-KURGHLK, HAKHLK!" With that, he'd reached his breath holding limit, doubling over and covering his mouth with both hands, still in an orgasm but now ignoring it, looking over at Scratch with a panicked expression. "MMMGHK! HMM-MM!" His cheeks rapidly expanded to nearly double their previous size as his lungs gave out, all of what was left of his air collecting in his mouth. They were so big that Scratch had to step away to keep from having them squish against him, though it didn't last long, as Chomper's instincts forced him to finally exhale.
"BLABLGUAGULBLUBL!" A huge cloud of bubbles erupted from Chomper's mouth, cheeks noticeably taking a moment to entirely deflate, his orgasm briefly intensifying before quickly returning to being just about done. His mouth hung open for a moment, subtle airless gurgles being audible from it, before he gasped. "HUU-GLP!" He managed to swallow the water before it could reach his lungs, and while this was certainly a losing battle, he kept it up as long as he could.
While all this happened, Scratch had frozen up, starting at Chomper with terror in his eyes, knowing he would soon be in the same situation. His cheeks repeatedly expanded and contracted as he tried to rebreathe his near-worthless air, both hands on his mouth, but a badly-timed convulsion of his chest forced a good amount of air from his lips regardless, and he instinctively sucked in. "HUU-GLK-HHUUUAAAGLKLGK!" He wasn't able to redirect the water like Chomper was, and it poured straight into his lungs. Instantly switching to grabbing his neck, Scratch coughed up the water along with a burst of bubbles, then sucked in again. Repeated coughs and gasps resulted in fewer and fewer bubbles each time, until it was only water flowing in and out. Surprisingly, it actually felt kind of good, at least on some level, and as he gagged on a mouthful of water, his dick spasmed and he came, his shots of cum synchronized with his desperate attempted inhalations. This certainly wasn't anywhere near enough for him to enjoy himself, but it made the process less awful than it would've been.
Strangely, even though he knew he wasn't swallowing, it seemed a good portion of the water invading him was ending up in his stomach regardless, a feeling of coolness forming as his belly slowly visibly expanded. Chomper's was as well, and it grew noticeably faster as all the water he was taking in was being sent there, no portion going to his lungs only to be coughed out. Soon enough, a mistimed gulp let some water down his windpipe, and with a loud "GURGLK!", he started to properly drown as well, a last cluster of bubbles spurting free with the rejected water.
Now not bothering to move the water drop, the drowning dinos gasped and gasped, frantically kicking, their bellies continuing to inflate with water. "HUUAGHK, HURKH! HUUUA-HIC!" As the water filled them, the drop was slowly shrinking, but there was no way the two could take in enough that it couldn't hold them any more. Chomper instinctively tried to swim up, bulging the drop upward and helplessly beating on the "ceiling", while Scratch eventually managed to remember what needed to be done and swam against the edge again to get them moving, hoping he still had the right direction as he still couldn't see much of anything outside.
Having both been drowning for about a couple minutes, Scratch and Chomper were both now mostly just heavily panting instead of choking, though they'd still occasionally jolt and gurgle every few seconds, each having their stomach continue to bloat. Chomper finally regained enough composure to realize what Scratch was doing, and joined him in pushing once again, still clutching at his neck with one hand. While their faces had turned mostly blue, neither seemed to be losing any energy, and were still struggling just as hard as when they'd first inhaled.
Of course, their energy - and what tiny amount of oxygen they had left - was very slowly draining, and they could feel parts starting to go numb. At the same time, water continued pouring into their bellies, weighing them down and continuing to reduce the water drop's size. They eventually couldn't swim any more from all the extra weight and had to stand instead, each of them looking like they'd swallowed a beach ball or two. While concerned they might not be going the right way, they both just kept going. At this point, even if they were going straight toward the pond, actually making it before passing out was getting pretty unlikely.
Over several more minutes of water breathing, their panting slowed, their bodies started turning blue, and their bellies filled further. The water drop's inside started to be rather cramped, no longer having enough room for Scratch and Chomper to keep from bumping against each other, especially with how much they'd inflated. There was no gasping any more, just waterlogged groans and hiccups, until Chomper tried to say something. "...w-why arre ww...we s-hic-sso...fff...huu...ffat...?" Fat wasn't really what he meant, but he couldn't think of the right word. Scratch didn't respond, currently in even more of a drowned stupor than Chomper and not noticing he'd even said anything, just on the edge of passing out, while still pushing the water drop, though he wasn't sure why any more. And, just 30 seconds later, Scratch's body started to give out, stumbling and slumping forward to rest on his huge belly, eyes rolling back as he weakly gurgled, still moving as if he were pushing, though clearly slowing down. "...nn.....hurgh...." Chomper patted his back to try to help wake him up, with no result. The going would be even slower without Scratch's help, so Chomper felt it would be worth it to keep trying to wake him, and, noticing that he himself was still erect, had an idea of how he could do so.
Stopping his pushing against the drop, Chomper awkwardly stumbled to get behind Scratch. With most of its water inside the two drowned dinos' stomachs, Chomper had to stretch the drop out a bit to manage, then saw that Scratch's dick, too, was hard. He put his plan into action, weakly grabbing their dick to masturbate them, hoping they were still aware enough to notice it. "....mmnnguuhh..." A weak moan confirmed that Scratch was indeed still conscious, and Chomper continued. Thankfully, it didn't take that long, and after only about 10 seconds, Scratch shuddered as he came for a second time, then shot back to awareness. ".....GHURK!" He briefly flailed in place, spreading his cum around smacking Chomper in the stomach a couple times, before scrambling to his feet and going right back to pushing the water drop with the absolute last of his energy. Chomper wanted to join in, of course, but with how little space there was and with Scratch panicking so hard, he'd be risking being hit more, so he stayed back and started masturbating, focusing on just staying awake.
They made a surprising amount of progress in Scratch's last struggle, which was absolutely worth spending some time on waking him up, but it wasn't long before he slowed again and eventually fell back onto his belly. Chomper took his place at the drop's edge, forcing himself to speak again. "...hhhanng o-hic-onn...Sss...c-cratchh..." He could hear Scratch's near-inaudible gurgles behind him, and was pretty much certain they'd finally lost consciousness.
Chomper continued pushing alone, continually bumping against Scratch's fully drowned body, for about another minute. Even he had just about reached his absolute limit now, and soon found himself falling onto his belly like Scratch had theirs. Except, there was something odd about it; he seemed awfully low... Unknown to him, with his heavily blurred vision being no help in seeing anything outside the water drop, he'd actually gotten to the pond! The drop was now sliding down toward the water, and the change in "terrain" had been what had sent him off balance. Still, he couldn't manage to make himself move any more, and started to lose his fight to stay awake.
Then, at last, the drop touched the pond's water and merged with it, sending its captives sinking into the pond. Chomper still didn't notice, limply tumbling across the bottom towards a more flat section. However, he eventually happened to hit his head on a rock, and that gave him the jolt he needed to awaken. "HURGHK!" He grabbed at his neck and choked hard for a moment, so panicked he didn't even notice he was now having an orgasm. Instinctively, he tried to swim up, but the weight of all the water in his packed belly prevented that, and, frantically looking around for a moment, he took off swim-running toward what seemed to be the shortest, easiest path to the surface. He did feel bad about leaving Scratch, but planned on getting his first gasp of fresh air in over 20 minutes first, then going back for him.
The size of his belly made it tricky to run, and it swayed back and forth with his movements, but Chomper managed to work around it. Like Scratch had, he weakened quickly, and while he could still keep himself awake, he knew it wouldn't be for very long, already exhausted from drowning for such a long time. Before long, he once again fought to keep from passing out, and, not really paying that much attention to where exactly he was going, tripped and landed back on his belly with enough force to cause some of its water to spurt from his mouth. "Blughk!" Chomper's eyelids drooped as he wriggled in place, no longer having the coordination to right himself, then soon went limp. He was still barely awake, his vision dimming as he hiccuped a few more times, but without the strength to move he just laid there, shuddering and spasming. With one last thought that was barely even audible in his own mind, "....ssorrry...sscratch.......", his body finally gave up, his eyes closing and consciousness fading. He shivered a little more, then went still, the two shrunken, thoroughly-drowned dinos left to die on the bottom of the pond, so close to safety after everything they'd done.