A Fizzy Combo (Patreon Commission for Rioku)

He didn’t remember whether it was him or one of his friends who suggested performing that stunt, but as soon as Kelby saw the bulk box of Mentos packets on sale for such an affordable price, he really couldn’t avoid jumping at the opportunity at the first chance he got. Never in his life had he seen so many of those things in one place, and already he was thinking about how he was going to thoroughly enjoy himself as soon as he had some time; his day off was on the other end of the week, giving him plenty of time to fantasize about how amazing it was going to be to drown himself in coke and then pour half of his body weight in fizzy little pellets down his gullet and into the sea of soda safely packed in his belly. It was so bad that his coworkers noticed, and a few even poked fun at whatever “random nonsense” he thought up for himself that time; not that Kelby cared, it was his nonsense and he was going to enjoy it!

Just after clocking off, late that Saturday afternoon, the corgi took a small detour before heading back home, stopping at a supermarket to stock up on as much cheap soda as he could; the flavour and quality weren’t important as much as it being carbonated, though the cashier on check-out absolutely did not buy his excuse that it was all for a party he was hosting. Not that it mattered; they didn’t know him and he rarely went there anyway, so there was very little chance it might impact his fun. Dragging all of those bottles back to the car was still a pain and a half, leaving him huffing from the strain after a whole day of sitting down and doing nothing.

Once he was back home, it was time to prepare everything for the big show the day after. There was no point getting down to business when he already had to prepare dinner and get some rest, so might as well have a good night’s sleep so he could spend as much of his day off as possible abusing his body’s limits; he was shaking at the thought, quivering really as the images flashed through his head and he imagined what was waiting for him during those long hours. It was doubly good in that it was something he had wanted to try for quite some time, and yet it took until a couple of weeks prior for the idea to truly crystallize inside of him after a particularly drink-heavy night out with his friends. Kelby was taking control over his own kinks and throwing himself into the maws of indecency, and that’s exactly how he liked it!

Poor thing was so excited he could barely even sleep, only just getting six hours after his brain shut off sometime past two in the morning. The canine practically jumped out of bed, filled with boundless amounts of energy that lasted for precisely ten seconds before his body remembered how early in the morning it was; nothing that a good cup of coffee and a hearty breakfast couldn’t fix though, after which Kelby happily bounced over to the living room, where he had left several bottles of soda carefully laid out on a small table, with the box of Mentos right beside it. Like a painting, they beckoned to him, promising so many good memories that the corgi could barely even take a step from how much his knees were rattling with anticipation, enough that he more collapsed on the couch than sat down.

He took a few deep breaths, preparing himself for what was coming, and only then bent forward to grab the first bottle, uncapping it… and then staring at its contents. He was about to do something incredibly stupid that would most likely ruin both his figure and the taste of the drink for months to come, not to mention something that carried a non-zero risk of leaving him permanently bloated, and yet he couldn’t bring himself to care. Slowly, he brought the opening to his mouth, gently tilting the plastic bottle upwards to let the sweet soda inside fall into his throat as a continuous stream, allowing him to take long, periodic gulps. His eyes were watering before he was even halfway done, his throat burning from the strain of taking in so much at a time, but he kept going regardless, knowing that if he got through the first hurdle, every other that came after it would be immensely easier on him.

A full minute later and he was letting loose a colossal burp after emptying out the last drops, patting his stomach after throwing the bottle away towards one of the corners of the room. He already felt bloated, though not nearly to the extent that he wanted to… and that posed a serious question: was he ready for the second part of his plan? He originally wanted to pair up a bottle with a packet, but now that he thought about it, he did have more soda than he did treats, so why not go a few steps beyond that and truly go for broke? There was nothing stopping him, and it’s not like he was going to drink that low-grade crap on his spare time… so off he went to grab another dose, wincing as he felt the fizzy drink splash on his tongue and he spent yet another minute emptying out far more of it than he normally would. By the end, he could see the curvature to his belly, and was possessed of both a need to rub it, and a desire to fill it up even more, the latter of which he was finally ready to get down to business with.

With a heavy groan and a few mumbled curse words, Kelby leaned forward and grabbed a packet of Mentos, not so much unwrapping as tearing it apart, before dumping its contents into his open mouth. There was a lot of practice involved in that gesture, more than he was comfortable admitting, so much that ignoring his gag reflex was pretty much routine for him; all he needed to do was build up a small pile of treats at the bottom of his mouth and then swallow the whole thing down, massaging his throat to help him move the glob of candy downwards. He had to swallow a few extra times just to move it into place, and almost felt short of breath, but experience and determination won at the end of the day; within just a few seconds, he felt those things plunge into the swollen reservoir of cheap soda that was his stomach, and almost immediately the mixture began to take effect.

The swelling didn’t get much worse right away, but he still felt the pressure inside of his stomach rise as the two substances combined to form a ball of gas, or whatever it was they did, making him feel even more stuffed than he already did; this was far less uncomfortable than the corgi’s wildest expectations as well, feeling less like he was about to burst and more like a good couple of meals safely packed away inside of a big ball of happy, inviting warmth that seemed to be expanding at just the right rate to make it feel like a massage. Truly, his body had been prepared for that endeavour.

He placed his hands on his bare belly, taking care to keep them far enough apart that his fingers wouldn’t touch, and sat there waiting for it to happen. It was slow at first, almost imperceptible, but as the bubble inside of him continued to grow, so too did the distance between his fingertips, with his hands slowly being pushed apart as his belly swelled up and outwards, just enough for him to notice it in between breaths. It was like a continuous inhale, one that left him feeling wonderfully full, and warm, and fuzzy, and desperate for more; it wasn’t enough for him to just do that once, it had to happen again. He had to lean back towards the box of treats, practically rolling over his stomach to do so, had to gorge himself on another full packet… only to find out that whatever fizziness had been inside the soda was long gone by the time the second dose plunged into it.

No problem; he had more bottles anyway! All he had to do was grab more of the sweet, sugary juice and guzzle it down like he was about to die of thirst, his belly gurgling aggressively in protest to the ridiculous amount of fluids it was being forced to take. There was some minor bloating, courtesy of the intact candies still inside of him, but nothing major; he’d have to get more of those things in him if he really wanted to experience some proper growth. A second bottle down his throat, a burp, followed by a third and him groaning as the sugar rush hit him square in the head; without thinking, a fourth bottle, he couldn’t drink anymore, his stomach was rumbling! The world swam in front of his eyes as he tried to keep his composure, barely able to see straight as he rolled onto his side and then his back. With his belly turned to the ceiling, Kelby spent a good ten minutes scrambling to pull the box of Mentos closer to him, then ten more digging in it for one of the extra-large packets; he was sluggish, his movements slow and ponderous, but he did have a goal in mind.

One by one, the candies rolled down his throat, swallowed whole with little difficulty. The corgi could almost hear them drop into the soda inside of his bloated stomach, followed by the unmistakable sound of the gas building up. One by one, he filled himself to bursting and then even more, until the sensation of fullness began to spread to the rest of him and swallowing at all began to grow harder with each treat. It was so easy before, and yet now it took him half a minute just to get a single pellet down his gullet; but he had to keep going, there was still so much soda left for him to abuse!

Kelby took a moment to rest, drawing deep, slow breaths in an effort to center himself and find some last remnant of energy he could tap into. Small burps erupted from his throat every few seconds, the fluid content of his stomach sloshing loudly with even the slightest of motions. He wanted more, but he knew he couldn’t, knew he shouldn’t… but he still wanted it. The canine, still reeling from the impact his binging had on him, pulled another large packet and dropped it on his chest, staring at it for a few minutes. It wouldn’t do to just eat away at it one unit at a time, he had to bring all of its contents into him at once. He winced, his fingers slowly unwrapping it and piling all of the treats together, knowing that he was about to do something so stupid that even his lust-addled mind couldn’t find a way to justify it… but he did it anyway, until he had all of the candies neatly bundled up on his palm. The corgi stared at them. He knew what had to be done. He opened his mouth. He threw them in.

And though it pained him, he swallowed.

Both hands went to his throat, massaging it to help his dose go down easily. Down below, slightly muffled by the layers of fat and immense quantities of juice, the Mentos fell into the soda pool in three quick, consecutive splashes. And right afterwards, that warmth again; that delicious, inviting warmth that lulled him into a state of ecstasy unlike any other, with his eyes fluttering close and a soft moan escaping his lips. Kelby could practically hear his skin creak as it was forced to expand, his stomach slowly bloating to the size of an overinflated volleyball, pushing his belly outwards until he looked gravid. His hands, once more placed atop that dome, saw their fingers being pushed out, giving the dog both a visual and tactile spectacle to delight himself with. He felt the pressure rise to nearly unbearable levels, until it hit a wall; it wanted to keep going, wanted to become stronger, but his stomach lining held strong, and so too did his body. Kelby almost wished that it hadn’t; he didn’t want to pop, but he needed some form of finisher, something he could use to wrap up that session before resting for another one later that day. He was already at full mast, he needed that extra edge to finish off!

… and he got it.

Like a switch being flipped, the force pressing on him from the inside reached a peak, and climbed a final step. Like a dot at the end of the sentence, and with a small, almost inaudible pop, his belly button went from being an innie to an outie, becoming a tiny little bump on his belly. To most, this wouldn’t be much at all; to Kelby, it was enough to finally let him break through his limit and have his arousal hit its literal climax. The slick pre flowing from his cock’s tip was replaced by a series of strands of his seed, thick, white cream firing off onto the couch while his member twitched something fierce; Kelby himself arched his back when his orgasm hit him, lacking the strength to hold himself together and the willpower to avoid moaning out even harder than before. It lasted only for a few brief seconds, but it was enough to leave his mind, his body and his couch a complete mess, a few strands of spunk still pooling down by his nuts as the dog slowly slid into his refractory period.

Breathing was hard, but manageable; every time he tried to fill his lungs was just another reminder of how swollen that stomach of his was, giving his shaft even more of a reason to stay as hard as possible. Kelby knew that it wasn’t the end for the day; he still had at least one session planned after he emptied out and digested properly, to say nothing of potential reruns later in the following week. But for the time being, he allowed himself to rest and recuperate. His body had taken quite the beating and deserved a few hours without literally being stretched to the limit, while his brain really needed to focus on something other than constant horny. Rushing ahead to the next orgasm wasn’t necessary; he had a whole day ahead of him!

Not to mention a whole box of Mentos and about fifty bottles of soda left. God, he could taste it already.

And in seconds, he’d be feeling it again too...