A bubbly revenge

It started with simple arm wrestling, as Shorty tried to prove to Rhett who was the more "alpha" of the two. With Shorty never being satisfied, though, things slowly got more and more heated, and as they eventually started running out of ideas, they turned to more strange contests, like daring each other to go nude for an entire day (which they both ended up actually quite enjoying, to the point that they'd stay that way as much as they could get away with). Despite not being able to swim, and simply sinking like rocks underwater, they would also try things like running as far along a riverbed as possible in one go, or taking turns walking deep into an underwater cave, marking a spot, and daring the other to go past it in an odd twist on "Chicken". Such games had led to a substantial improvement to their lung capacity, as well, both Rhett and Shorty now being able to hold a single breath for a record of almost 15 minutes, long enough that they could actually reach the deepest point of the flooded cave and even relax there for a couple minutes before needing to return. Shorty had gotten sick of trying, and wanted to prove once and for all that he was the better... But how?
Finally, he thought of something. "Hey, you ever heard of the Dewdrop Forest?"
"Yeah, but it's not real. The hell are you bringing that up for?"
"It is real! I've been there, and there's stuff there that'll help me finally prove I'm better than you!"
"I think it's pretty clear how much you suck, I've won like two thirds of these."
"Yeah, because you cheat so damn much!"
"I've never cheated at any of these. You're the one that's always like "DeH, tHaT oNe DoEsN't CoUnT!"" Rhett put on a whiny voice and waved his arms around as he imitated Shorty.
"Oh, shut up! There's no way either of us can cheat at what I've got in mind, this time. Come with me so we can fricken' settle this, finally."
"Ugh, fine. I'm sure I'll win yet again, and then you'll start bitching and moaning like always."
"There's no way you'll win this time, I know it."

Hours passed, with Rhett slowly getting frustrated and impatient, until Shorty gave an update.
"Alright, we'll be pretty much there once we're over this hill."
"Fricken' finally, this damn spot just had to be this far away."
"I think it's actually good that it's so far, means no one's gonna mess with us. Anyway, we're here!"
"...H-holy crap, it's real..."
They'd arrived at the Dewdrop Forest. Enormous trees with suitably huge leaves towered above them, occasionally dripping giant water droplets that would usually splatter about on the ground, though sometimes they would stay intact. The place made it seem as if the two nude longnecks had shrunk without noticing.
"Okay, this is rad as hell, but I don't see how this is gonna help prove that, once again, I'm clearly better than you."
"Give me a damn minute, there's a specific spot we gotta go to for this."
He didn't actually have a particular place in mind, though. Rather, he was currently searching for one, and playing it off as if he'd planned it from the start. He just had to find the perfect spot...

"Here we go, this is the place. Wait here a few minutes, I've gotta get this set up and I don't want you getting a chance to figure out a way to cheat at this like everything else."
"Hurry it up, I didn't want to make a day out of putting you in your place yet again."
Shorty ran off behind a nearby tree so Rhett couldn't see what he was doing, and began climbing it as he thought about his plan. There seemed to be only one way Shorty could finally prove once and for all that he was better than Rhett: By killing him. The spot he'd told Rhett to wait at was below a fairly low branch, and a leaf directly above him had a large water drop that seemed to be about Rhett's size precariously balanced on it. Shorty could climb up to the leaf and push it down, which would make the drop fall off and land where Rhett was standing, trapping him inside and dooming him to drown. Now that would prove who was really better!
Carefully, quietly climbing along the branch, Shorty managed to get into position, thankful that Rhett hadn't happened to look up yet. He pushed on the leaf, making the water drop slowly start moving, like he'd predicted, and he couldn't resist making Rhett aware of how screwed he was. "Hey idiot, up here!"
"Wha- How'd youAAH!" Was all Rhett had time to say before the giant water drop landed with a loud PLOMP, its weight slamming him to the ground and stunning him for a moment, landing on his big belly as his butt jiggled about. When he returned to his senses, he barely managed to avoid gasping in surprise as he realized he was submerged! "MMM!?" Rhett puffed his cheeks, pushing on an edge to try to get out, but to no avail. It probably wasn't too big a deal, Shorty would be there to help him out before long, but, not having gotten a good breath, they'd have a lot less time than they could've.
Shorty seemed to be in no hurry whatsoever, taking a good minute to climb down from the tree, then looking oddly excited as he jogged over to Rhett. Then, Rhett found out what was really happening. "Finally, FINALLY! I've got you beat this time, you jackass!"
"Wablit, yoblu plblannbled thblis!?"
"Hell yeah I did! Now shut up and save your air, I want to enjoy this for as long as possible."
Clearly, Shorty wouldn't be any help, so Rhett started smacking and pulling the edges of the water drop, seeing if he could pop it on his own, but it didn't seem to accomplish anything. Then, he tried slamming against the edges, hitting them with a surprising amount of force, dick and balls flopping as his urge to breathe was already getting distracting.
After fidgeting with the side of the drop for a few seconds, Shorty awkwardly leaned against it, somewhat smooshing his belly as he watched Rhett's struggles. "Clearly, I'm the best between us, and if killing you is what it takes to prove it, then I'll do it. Plus, you deserve this, with your stupid constant cheating to make yourself look better."
"Ibl neblver chbleatbled, dablmn iblt!"
"Still not gonna admit it, huh? Just gonna be a pompous asshole to the very end?"
Rhett shoved toward Shorty, who didn't move, confident that they were safe outside the water drop. But, Rhett didn't try to escape; instead, he managed to stretch out the drop enough that he could wrap his arms around Shorty and try to pull him in! "O-oh crap, don't, YOU'RE GONNA-"
shlup!
As the drop returned to its normal shape, Rhett was bounced to the opposite side, dragging Shorty along with him! Like Rhett, Shorty hadn't gotten a chance to get a deep breath, cutting his potential breathholding limit by a substantial amount. Having assumed he wouldn't end up getting stuck in a drop himself, Shorty hadn't bothered to figured out a way he could escape from one, and now he was paying for it. Even if he found a way out, though, Rhett would also probably be able to use it, and then this whole ordeal would have been for nothing.
Both the trapped longnecks tumbled to the bottom of the water drop, Shorty landing atop Rhett as their bellies pressed together. There was barely enough room for the two of them, and it took some effort for them to stand up, seemingly not being able to avoid touching each other. Rhett glared at Shorty. "Whblo's goblt whblo beblat, noblw?"
"Hbl-hblelp mble fiblnd abl wably oublt oblf thblis!"
"Onbly iblf yoblu adblmit Iblm bebltteblr thblan yoblu."
"Fiblne, whblateblver! Ibl sublck, yoblu're thble beblst!"
"Hblell yeblah. Riblght, leblt's fiblgurble thblis oublt."
Rhett and Shorty squirmed around until they were facing opposite directions, their butts pressing together, and Rhett started to get aroused as his lungs complained about the lack of air and all the bubbletalking. Both dinos pushed against opposite sides of the water drop, hoping their combined strength would be enough to pop it as the drop's ceiling pressed down on their heads. Even now, they didn't accomplish anything, and with Rhett's cheeks starting to expand as his fat belly jiggled and heaved, it was clear they were running out of time.
Rhett ducked down and motioned for Shorty to climb onto his shoulders, which he did, having the same idea as him. Then, Rhett lifted him up, and he pushed against the top of the water drop. Rhett looked up at Shorty as the drop stretched and stretched, little bubbles from his nostrils floating up and rubbing along Shorty's balls. Suddenly, Shorty's hands slipped, the drop squishing back to its regular shape and pushing Shorty down, causing him to inadvertantly press his butt against Rhett's face. Rhett burbled in surprise, forcing Shorty's ass off him and sending him falling back to the ground. "Hmp!", Shorty went as he landed, puffing his cheeks larger for a moment.
As he got up and noticed that Rhett now had a hand over his mouth, with purple-tinted basketball-sized cheeks on either side of his head, Shorty was reminded of his own need for air, the exertion of his struggles having used up quite a bit of his oxygen. His belly started heaving like Rhett's, and he too started getting aroused from holding his breath so long.
They both started to panic, trying to smack at the water drop's edges, though more often accidentally hitting each other instead as they bubbled out desperate yells.
"GEBLT UBLS OUBLT OBLF HBLERE!"
"HBLELP! HBLELP UBLS!"
"SBL-SOBLMEOBLNE-URK! MMBLBLB!"
Rhett doubled over and pressed both hands to his mouth, cheeks now looking like they each held a beachball inside as they started to tint blue. All he could really do now was focus on holding what remained of his breath, thrusting his hips forward a few times as his dick heavily throbbed and began leaking pre. Shorty, meanwhile, kept beating on the sides of the drop, knowing that he didn't have all that long before he'd be in the same state Rhett was currently in.
"MMRK, HRBLK-GLP!"
Gulping some water that had slipped into his mouth, Rhett started to rapidly deflate and reinflate his cheeks, rebreathing his nigh-useless air in an attempt to last just a little longer. His cheeks got a bit bigger each time he inflated them, beginning to press against opposite sides of the water drop and stretch it out. Soon enough, all that stretching cut down on the usable space to the point that the edge of the drop would rub against Shorty's dick, as if the drop itself were masturbating him. Shorty tried his best to ignore it, but each time Rhett puffed his cheeks bigger, and the drop rubbed further along him, it became more and more distracting...
Eventually, Rhett was puffing his cheeks several feet wide, stretching the drop so far forward that Shorty would actually be momentarily pressed against Rhett's back each time, his face and belly squishing against the edge. This had gone on long enough that Shorty could actually feel himself approaching an orgasm, the water drop's rubbing starting to be too much to handle. Then, Rhett finally reached his limit.
"HM, HMM, MMMMMMMMMBLBLABLABLABL!"
Rhett's cheeks reached an even more absurd size for a moment before he'd blow out a huge cloud of bubbles, and Shorty being smooshed the tightest yet was enough to bring him over the edge, moaning loudly as he started cumming into the water. Just a moment into that climax, though, Rhett inhaled.
"GGHHUUUUUAAAGLKULK!"
The water drop very slightly shrunk as a flood of liquid surged into Rhett's lungs, and he too was sent into an orgasm from the shock. With the space being so tight, and both dinos cumming at once, it was almost inevitable that Rhett would accidentally inhale some cum as he'd desperately gasp. Though, he didn't start choking, covering his mouth again and puffing his cheeks back to beachball size as he held in what tiny amount of air remained in him, as well as all the water he'd inhaled. Shorty looked at him with fear in his eyes, before noticing that the air Rhett had exhaled hadn't ended up leaving the water drop, pooling on the ceiling of it. He jumped up and inhaled as much as he could, it not really occurring to him how useless doing so was.
Falling to his knees, Rhett tightly shut his eyes and rocked back and forth, barely able to withstand the inferno in his flooded lungs as his face turned a deep blue. Shorty put both hands on his mouth, as well, cheeks slowly getting bigger as he finally realized that gasping Rhett's exhaled air had done essentially nothing.
The lack of oxygen began to wear on Rhett's mind, letting go of his breath once again and starting to just pant at the water as a dizzy feeling washed over him. Sleepily looking at Shorty, he got somewhat frustrated that they were still holding their breath instead of drowning alongside him. To Rhett's drowned mind, the only thing to do was to get Shorty to start sucking down water with him. He struggled to gurgle out his frustrations to Shorty, first. "...nnotfffairr...yyourrnot-hic-dh...d-drrownnin" Shorty nervously looked at him. God, he's getting delirious! How the hell do we get out of this stupid drop!?
Assuming Shorty had misunderstood him, Rhett made it more obvious. "fffriggn breathhe...hulp...dammmit..." "Mm-mm!" Shorty refused, shaking his head, making his huge purple cheeks flop back and forth for a moment. It seemed Rhett would have to be more forceful in his efforts to get Shorty to drown. As his body started to tint blue, Rhett tried squeezing Shorty's belly to force out his air, though all it did was make his cheeks inflate further for a moment before returning to their previous size. "Kh...khome onn...jjuss-huup!" Rhett's gargled complaint was interrupted by his instincts forcing him to take a deep breath of water and hold it, puffing his cheeks about a foot wide.
Shorty started rebreathing like Rhett had as his cheeks tinted blue, though his cheeks weren't yet expanding to the absurd size Rhett's had. Rhett fell backward and slid down the side of the water drop, his belly jiggling as he landed on his butt, and tried his best to focus on finding a way to force Shorty to breathe the water...
A good few seconds passed before Rhett realized he was blankly staring at Shorty's erect dick. It seemed Shorty had already gotten aroused again, despite his recent orgasm, and noticing that gave Rhett another idea. If he could make Shorty cum, they would moan out their air, and then most likely start gasping down water! Weakly reaching forward, Rhett grabbed Shorty's dick and started stroking it. "MNGLARGL! RHBLETT!?" Shorty slapped Rhett's hand away, but soon had his dick grabbed again anyway. This cycle repeated another couple times, then Shorty just turned around so Rhett couldn't reach. Instead, though, Rhett squished Shorty's butt with one hand and rubbed their balls with the other. Shorty had had enough of this, and elbowed Rhett's gut! "HUGLK!" "STBLOP IBLT!"
He wouldn't give up so easily, struggling to his feet and lurching toward Shorty, trying to wrap his arms around them. Rhett had gotten horny again, as well, and his erection ended up pressing against Shorty's back a few times as the two of them fought. Shorty managed to push Rhett away and punch his gut again, making Rhett double over with a loud gurgle. Shorty's rising anger made him forget about his need for air for now, pushing Rhett over and putting a foot on their belly to pin them down. "Yoblu stblupibld JABLCKABLSS! Thblis cobluld'blve beblen SBLO siblmplble, bublt NBLO! Yoblu jublst HBLAD tblo bble abls inblfurbliatbling abls evbler anbld scblrew mble ovbler!" Just after that, Shorty's chest heaved hard and he pressed both hands to his mouth, going back to rebreathing as he remembered how badly he needed to breathe.
As drowsy as Rhett had become, he knew he could take advantage of Shorty's hands being occupied, reaching up for their dick again. Shorty felt he absolutely needed to keep one hand on his mouth, so he could only use one to try to slap Rhett's hands off him... But, it wasn't enough. Each time, his dick would be rubbed a bit despite his efforts, and his rebreathing accelerated as he felt an orgasm start to build up. Finally, the inferno in his lungs forced him to keep both hands covering his mouth, tightly shutting his eyes as he tried to ignore the pleasure of Rhett now freely jacking him off. Shorty's cheeks got bigger and bigger with each internal exhale, soon taking up most of the space in the water drop... Then, his arousal reached the point of no return.
"HMRGH, HRK, MHABLALBALBL-HUUP!"
Shorty glubbed another loud moan as he came hard, repeatedly spurting cum in Rhett's face before sucking in water. It took a ton of willpower, but Shorty managed to take only a fairly small breath before covering his mouth and puffing his cheeks once again. Like when Rhett had exhaled, Shorty's bubbles pooled on the ceiling, and he jumped up to gasp them back down, though it didn't seem to help, and the movement caused the water in his lungs to slosh around for a moment. Rhett was certainly enjoying this scene, a dopey smile forming on his blue face, before, satisfied that Shorty was finally drowning, he let his eyes roll back and he shuddered several times, before going still. At last, Rhett had fully drowned, leaving Shorty alone to hold onto a lungful of both water and exhausted air.
He didn't last very long. Another 10 or so seconds later, Shorty hacked out the water and the last of his air and gasped hard, his lungs now completely filling with water without a single bubble remaining. Panicking once again, he went back to hitting the edges of the water drop, trying to scream for help even as he'd choke and gag on the water.
"GHUUELP! I-KAKH!-I'M D-DROW-HUUAA!-NNING! G-GLURK!"
After almost a full minute, Shorty's frantic gasping started to slow down, and his smacks against the drop's edges were losing force and coordination. He glanced over at Rhett's drowned, deep-blue body, and tried to pull himself together. If he didn't get out soon, he'd end up pretty much the same way! Another half minute of struggling, then Shorty started to weaken again. This time, he couldn't seem to recover, and as his body began to tint blue, his desperate beating on the water drop slowly turned to pathetic little slaps, his vision blurring. As weak as he was becoming, though, he refused to give up.
A minute passed. And another, and another. At this point, Shorty's mind was so dulled from drowning for so long that he ended up forgetting why he was hitting the water drop in the first place, and stopped. wwh...wwwhat was I...umm... He looked around, trying to remember what he was doing. With his dim and heavily blurred vision, Shorty couldn't see very much beyond a few feet, most things just ambiguous blobs of color... Though, he could at least tell that Rhett was next to him, slumped against some weird shiny thing.
"hhh...heey Rrhett...ww-hic-wasssomethin immportuh...i-imporr...ulp...imporrtanntuh, hhappenninn...?"
Rhett didn't respond, of course, but Shorty believed that they did, beginning to hallucinate.
"Yeah, I got nothing... You look messed up, by the way, how long have you been awake?"
"uumm...d-donn't reme-hic-remmemmmbuh..."
"Jeez, man, you can barely talk! You ought to just... Lay down and rest a bit. This certainly isn't the comfiest place, but I don't think it'll matter at this point."
It didn't occur to Shorty that Rhett almost certainly wouldn't talk like this; nodding, Shorty just sort of let himself fall, too tired to care about potentially hurting himself. Staring up at the sky, he shivered somewhat in his body's last, weak struggles against the water, hiccupping and gulping a few more times. Finally, his movements came to a stop, though he remained barely conscious a while longer, too weak to even breathe the water any more. His vision had gone almost black, and his body was completely numb, except for his weakly throbbing erection. Sleepily looking at it, Shorty tried to reach for it and jack off, but found that he couldn't bring himself to move. ...rrhett wwas right...neeed a nnap... Accepting his utter exhaustion, Shorty closed his eyes for the last time, joining his rival in an aquatic sleep after almost 5 minutes of drowning.