Pissing Contest (Patreon)

Many decades ago, the human genome underwent mutation. A special human was born, one with complete control over their cellular structure. This person could alter their form in any way they wanted, growing taller or shorter, thinner or thicker, and could even alter their own brain to become smarter or dumber whenever they will. To this person things like age, race, and gender didn't matter, and why would it if one could switch between any possible human appearance they wanted?

This person became the father of many children, and gave birth to many themselves, and those children did the same. These sort of people were becoming more and more plentiful, and soon the public was starting to fear them. One of these mutants decided to help ease these fears and opened up a special school for these mutants. The goal was to teach these mutants to use their powers and prevent them from hurting themselves or others.

In this school, at the top of their year was two that went by the names of Kai and Luca. They tended to assume quite small and child-like forms, despite the rumors that these two were older than even the founders of the school. They were short and petite with bright golden eyes, choosing to style their hair in bob cuts that were pink and pastel blue respectively.

Unlike most other students these two didn't change their form often. That may have been for the better, since the two gained a bit of a reputation during their time. Becoming the teacher's pet and highly respected, any student would throw themselves at their feet if they so much as looked in their direction. The student body believed them to be absolutely perfect, to the point that some students genuinely believed they never had to use the bathroom. The two were a bit proud as a result, and that pride was only encouraged by their peers. They never met each other, on account of taking different classes, but each were sure that if they met she would be superior.

Around the end of the school year was test day. This was a day in which every class was required to give a test to their students, with the class groaning as they were simply given one examination after another. The only ones that seemed to not have any issue were Kai and Luca, who happily took every test as if they were just having a fun time.

In reality, the two hated the day just as much as anyone else. This was probably the most stressful time of the year, with everything they've done throughout the year culminating in this day. If they just so happened to fail even one test they might as well kiss their perfect image goodbye. The two aimed to get perfect grades again this year, and weren't going to stop for any reason, not even to use the bathroom.

The teachers weren't barbarians, one was allowed to take a bathroom break during the tests. But Kai and Luca were too proud to take that chance. They were afraid that asking once could ruin the image they've so desperately built, and so they just held it in. It was much easier for mutants like them to hold it in than the commonfolk, since the two could reinforce their bladders or make them bigger, but they couldn't hold it forever.

Finally test day was over, and everyone was finished doing their examinations, and the first thing Kai and Luca did was to rush for the bathroom. It seemed like many other students were thinking the same thing, and every stall was completely occupied except for just one. The two rushed into the stall and pulled their pants down ready to go, only to suddenly realize someone else was there. They finally noticed each other, in the same stall and the same predicament.

Kai looked at Luca and Luca looked at Kai. Aside from hair color the two could be regarded as identical twins. It was almost scary how similar the two were, but each chalked it up to the other trying to imitate her. Even their cocks were similar, being far bigger and thicker than one would expect of someone of their size. The two preferred having cocks when they went to pee, since peeing while standing was rather convenient. The both of them had them out and proud, facing the toilet, but since the two were next to opposite ends they were inadvertently facing each other as well.

"Excuse me," Kai said, her voice so calm one wouldn't believe her bladder was about to explode. "This stall is occupied, find another one."

"The one who should look for another stall is you," Luca said, with a voice that could make a person shiver. "I got here first."

"Even if you did, which is a laughable suggestion, it is only polite to allow your superior to do their business first."

"I think you're misunderstanding who the superior is in this scenario. Besides, you're simply in the way. Move!"

The two were shocked. No other student in this school ever defied them like this. While they remained as calm as they could on the surface, inside they were yelling and screaming at each other, wishing to tear each other apart because of this one instance. Their cocks brushed against each other, the slits starting to press themselves together.

"I don't think you know who I am. I'm Kai, a student with top scores that haven't been beat in this school's entire existence. If you know what's good for you, move!"

"Then maybe you don't know who I am. I'm Luca, the only person to tie with you in this school's 80 years of teaching. Although in my opinion I've always been superior!"

The slits of their cocks lined up, with the rods pressed into each other. The two were starting to shake, barely able to hold in a gargantuan amount of pee.

"Don't get cocky just because of a few good test scores!"

"I should be the one saying that you talentless hack!"

"I would call you that myself, but that would be an insult to actual talentless hacks!"

"Oh, was what I said too good for you!? Even a baby would be able to get better test scores than you!"

"If I were a baby you are probably a bacterium; you might as well be nonexistent compared to me!"

"How funny! You're like a poor person who deluded themselves to believing you're a monarch! You're nothing compared to real royalty!"

At this point Luca was at her limit. She was trying her best to hold it in, but a small bit of piss flew down the urethra. Since their slits were perfectly aligned it went right into Kai's, and found itself in her bladder.

Kai felt the bit of piss enter her bladder, and like a needle it made her burst. Everything was let out, falling out of her bladder and streaming into Luca's. A large stream of pee went down though their connected urethras and penetrated Luca's bladder. This was the point in which Luca burst, feeling her own stream of pee burst through their connected urethras and into Kai's bladder.

Luca's stream was blocked by Kai's stream, and the two were at a stalemate. The battling streams of piss clashed right in the middle where their cocks met, pushing at each other as hard as they could. Originally Kai and Luca were shocked at their sudden outburst, only to find themselves struggling alongside their streams of piss. The two attempted to force their piss into each other, feeling their streams getting pushed back and forth as they tried to pee into each other.

"How dare you!?" After a bit Kai finally spoke. "How dare you do something as rude like this to your superior!?"

"You're the one being rude!" Luca's voice started to lose its calmness. "And as a punishment I'll just turn your bladder into my toilet!"

"Not if I do so first!" Kai suddenly put a ton of force into her stream, pushing a large ton right into Luca's bladder. It swelled up so much a bump appeared on her groin, and Kai had essentially emptied herself.

"Not so fast!" Before Kai could pull away Luca grabbed her by the butt. She pulled and morphed her cock, infusing her cells into Kai's cock and essentially fusing them into one large tube. Then she suddenly blasted a stream of piss into her rival with a ton of force, essentially reversing the tides in one move.

"I'm not stopping until your bladder has been filled thanks to me!" Kai didn't let Luca pull away, infusing her cock into Kai's even further. The length of their shared shaft shrunk, like the two were being pulled towards each other.

"Same here." Luca continued to try and counteract Kai's stream, and the two pushed as hard as they could. Piss went back and forth between their bladders, being held by one for just a moment only to completely fill the other.

The entire time their fused cock was starting to shrink and shrink. The two were bringing their bodies closer to each other, slowly and slowly until there wasn't even evidence there was a cock there in the first place. The two still brought their bodies together though, fusing their nether regions together as the dueling bladders were brought closer and closer together.

The two grunted as their bladders literally pressed into each other. There was no urethra connecting them now, with piss directly going from one to another. Kai and Luca pushed and pushed, trying to force their own piss into each other's bladder as hard as possible, until there was a pop and the bladders fused.

There wasn't Kai's bladder of Luca's bladder now. The two had pushed them into each other so hard and so fiercely in their fight that there was only one bladder situated right between them. The two were in a bit of shock, not expecting this to happen, but still really needing to piss.

"Look at what you did." Kai's voice dropped any pretense of being noble or refined, simply sounding annoyed. "Do you know how long a fusion like this takes to untangle!?"

"You say this as if this isn't your fault," Luca said, sounding just as annoyed. "It's not like I need a bladder full of your piss anyways! Keep it!"

Luca started pushing the fused bladder into Kai's body, but met some resistance as she felt Kai push it back.

"If anyone should keep it it's you! You're the one who was being rude to a superior earlier!"

"How many times do I have to tell you that I'M the superior!? Shut up and accept it!"

The bladder found itself being squeezed and pressed as its two owners pushed it back and forth. Both of the two wanted to leave the other with the full bladder, simply planning to make a new one after breaking away, but neither expected the two to be of equal strength. Granted strength wasn't of much concern to a mutant, since they could just make themselves as strong as they need be, but in a fight like this that fact left them in an eternal stalemate. A bladder that eternally felt like bursting was now being pushed and pressed between the two, but with no urethra to let it out it was like the struggle of having a full bladder amplified.

The two grunted as they pushed, grabbing each other by the rear and pushing as hard as they could. Their bodies were pushed harder into each other, made thinner and thinner as they struggled to push the bladder into each other. They slowly shifted the position of their rears, sliding them across the surface of their body until they started to clash against each other as well. With a single push their butts were fused into one, completely fusing their nether regions together.

"Just accept my bladder already!" Luca was now yelling at her rival. "Just think of it as a gift!"

"Well it's a gift that I don't want!" Kai was now screaming at her rival. "Take it back!"

"Do you know nothing of manners! It's rude to return a gift!"

"Then think of this as my gift to you as your superior!"

"I'M THE SUPERIOR! I AM!"

The two shoved as hard as they could, but at this point there wasn't any movement. The bladder was full to the brim, unable to be shifted from how full it was, and the force they put into it was completely equal. The bladder didn't move an inch, all that happened was the pressure growing. The pressure between them grew and grew, to the point that one wrong move could make them explode.

"Why won't you just accept my gift already!?" Kai was exasperated.

"It's my gift! You're the one who can't accept it!" Luca was upset.

"If you won't accept that..." Kai regrew her cock, this one not connected to the dueling bladder. "Then will you accept this gift?"

"Let's bet on it then..." Luca did the same, making another cock that wasn't connected to the bladder. "Whoever wins this is the true superior."

The two brought their legs together and wrapped them around each other, fusing them into one single pair of legs. Their entire lower half was completely fused together save for the two cocks sticking out. Even that wasn't unfused for long, as the tips were made to bend over and align with each other once again. The tips fused right into each other, essentially leaving their lower half with an odd sort of cock ring.

The two brought their hands down to the cock ring, each grabbing their own respective side. Each side was jerked off as if it were its own individual cock, making them moan and boasting their pleasure more and more. They knew exactly how to handle their own cocks, jerking themselves off quickly and perfectly. The two shook as the pleasure within them reached its max, and they came.

Each end exploded with cum, attempting to blast semen into the other end. But like the piss before it they clashed in the middle, each stream not allowing the other to blast. The two didn't give up, morphing their testicles to produce an inhuman amount of cum and blasting it into each other, but the streams were equal the entire time.

The two grunted, desperately trying their best to pump their cum right into each other. A bulge formed right on the top of the loop, in the center of their connected cocks. It expanded to the size of a tennis ball, but couldn't explode due to the reinforced skin of a mutant.

"Give up already!" Kai's lower half was simply full of pressure. She was still struggling to push a bladder into Luca, and at the same time an orgasm was denied of her by Luca's own stream of cum. It felt like her nether regions could explode, it was extremely pleasurable, but at the same time she wanted it to stop.

"You should give up!" Luca was actively shaking. Her stream of cum was struggling in attempt to overcome Luca's, and she was actively struggling against Luca to push an entire full bladder inside. She had never felt this pleasure before, desperately wanting to feel a relief that wasn't possible as her body felt like it could explode.

The two were at this for hours, with no movement between them. Their cocks were filled with so much cum that it was actively impossible to place a single sperm inside them. Their bladders were in the same boat, and as such it was impossible for either to win. Yet they pushed as hard as they could, for a single slip up for a single second could make either lose.

Weeks went by. Months had passed. Neither had come back to class until the beginning of the next academic year. That year they applied to the same classes, explaining to the teachers that they weren't allowed to separate due to health issues. The staff eventually understood, and the two eventually went back to their normal school life, albeit with a twist.

The two were now eternally connected, sharing a single body with two heads. Putting their bodies together only seemed to do wonders for their reputation, with their peers regarding them even more highly than before. Many students would have loved to be them, but if that were the case they would be constantly feeling an insane amount of pressure in their bodies.

The two were proud, far too proud to surrender a fight they started. They continued to try pushing their bladders into each other, never using the bathroom as their shared bladder just grew and expanded. They continued to try and pump cum into each other, even masturbating each night to try and force a victory somehow. They even found other ways to fight, like connecting their buttholes when trying to poop and trying to shove it into each other. They connected the ends of their nipples and tried to spray milk into each other's tits. Even when they got sick and threw up they just connected their throats to each other and tried to force it into each other! Things entered their body but nothing came out, it simply became ammo for them to use in their eternal war against each other.

Some students were of the belief that these two were so perfect they didn't need to pee. They were right, but not in the way they thought.