-----
Part 1 Story:

Wendell and Fennix brought up the topic of who can hold their pee the longest based on past situations they had to endure. So they decided to make this into a contest and gathered several large bottles of Slap Juice.

The rules are simple. Every 15 minutes, both of them will chug an entire large bottle of Slap Juice and wait for the juice to make its way to their bladders. While the contest is going, both of their bladders will keep filling until one of them completely loses control or surrenders. Leaking is allowed but it can't last longer than a couple of seconds and can't be too frequent. Also they can't force each other to lose control (i.e. no touching, tickling, or scaring).

To make this contest even more interesting, Wendell placed a bet. Along with cleaning up the potential mess, the loser would also have to wear a diaper on any day the winner chooses and can't take them off no matter what until the end of that day.

Fennix: "Wow...um...didn't know you were into that too. Does that mean you're gonna lose on purpose then?"
Wendell: "Of course not. I just think you would look cute in a diaper."
Fennix slightly blushes but then realizes what Wendell is implying.
Fennix: "I'm not gonna lose! You know what? Deal!"

They sat on the leather couch in the living room and chugged their first bottle of Slap Juice. And now they wait...

30 minutes and a couple of more bottles later, both of them start making slight hints about their urge to pee starting to rise. Wendell is fidgeting while shaking his legs. Fennix gently places both of his hands on his inner thighs, ready to grab himself when the urge become stronger.

Another 45 minutes pass and both of them just finished chugging their 6th bottle. Now they are both visibly desperate to pee but haven't leaked yet. Wendell starts to whimper while fidgeting. Fennix starts breathing heavily while moving his hands closer to his crotch and squeezing his legs together. He notices Wendell's whimpering and decides to tease him a little.

Fennix: (mockingly) "Aww, what's the matter? D-does the doggy need to go outside?"
Wendell: "N-n-no. It's..it's just what I normally do at th-this stage. D-Dire thinks it cute."
Fennix: (mutters) "Of course he does."

15 more minutes pass and after reluctantly chugging their 7th bottle, both of them are on the brink of springing a leak. They both feel their bladders trying to distend from their lower abdomen, only to be obstructed by their clothes. Fennix decides to undo his belt and unzip his jumpsuit all the way down. He catches Wendell staring at his direction.

Fennix: "W-What? You n-never said I...c-couldn't strip. I'm not gonna lose this. Besides...this suit took forever to wash last time I had a huge accident on the bus."
Wendell: "Y-yeah it sure did. W-well...i-in that case..."

While Fennix continues to remove his jumpsuit, Wendell proceeds to remove his jacket, vest, and shorts. A minute later, Fennix is completely completely naked while Wendell is wearing nothing but his boots, gloves, and hat.

They both momentarily gaze at each other's bodies while trying hard not to blush. But the one part catching their attention the most is the slowly-inflating bulges on both of their lower abdomens. Now they at least know that they're both equally desperate to relieve themselves, and it'll be easier to tell if someone starts leaking or losing control.

15 minutes pass once again and it's time for both of them to chug another bottle of Slap Juice. However they are both becoming too busy fighting off strong waves of desperation while their bladders become more visibly distended and aching for relief.

Fennix: (grunts) "F-Fuck! C'mon Wendell, just piss yourself already!"
Wendell: "Nah y-you go f-first. I can w-wait."
Fennix: "I'm n-not...losing this. Let's get this next bottle over with then."
Wendell: "Wanna make this the...t-the last bottle for tonight? We're nearly out of juice at this point."
Fennix: "Yeah sure. You're gonna...p-piss yourself soon anyways."
Wendell: "We'll...we'll s-see about that."

They both slowly grabbed their 8th and last bottle of Slap Juice. Then they both chugged the bottle with their right hand while using their left hand to firmly grasp their crotch to avoid any leaks.

10 minutes later, the holding contest is nearly concluded as Wendell lets out a whimper and springs his first leak. He manages to stop the leak right away while only losing a few drops. Fennix lets out a groan of disappointment as he's also near his limit and wants Wendell to give up before he does. 

Wendell carefully stands up and starts slowly pacing around the couch while firmly holding his crotch. Meanwhile Fennix remains seated while frantically shaking his legs and breathing heavily to avoid leaking. 

A moment later, Fennix feels a sudden strong spasm in his bladder that caught him off-guard, causing a large spurt of warm liquid to quickly leave his body and land on the hardwood floor near his feet. He quickly shoots both of his hands in between his legs to regain control. However while doing that he feels another spurt of liquid leaving him, warming and dampening the fur on his hands, crotch, and inner thighs. Wendell stops pacing around to check up on Fennix.

Fennix: (whimper) "No. No no."
Wendell: "You okay there buddy?"
Fennix: "Sh...Shut up! I got this. I'm not losing...th-this."

Fennix manages to regain control of his bladder for a few seconds. However once he leans forward to try standing up, the extra pressure applied to his bladder causes him to spring yet another leak. He quickly leans back then looks down to notice a puddle already forming between his legs and making its way to the edge of the couch.

Wendell: "You sure you got this? You're making a...b-bit of a puddle already."
Fennix: ... (grunts)
Wendell: "I think you're gonna need a diaper at this point." (stifled laugh)

Fennix angrily snaps at Wendell an gives him an indecent gesture with his middle finger.

Fennix: "Fuck off! I'm not losing this! Just...j-just...give me a minute, please" (whimper)
Wendell: "Okay okay, relax, I'll stop teasing. I'm s-so close to bursting too, you know? J-just breathe, calm down, and you st-still might win this."
Fennix: (prolonged whining) "...okay"

Fennix continues his effort to stop the leaking before he loses the contest. At this point, there's already a warm yellow puddle beneath him spilling out of the edge of the couch and onto the floor. And so far Wendell has lost only a few more drops during their interaction, but he's also near his bursting point.

Wendell still thinks Fennix is about to be the first to completely lose control soon, yet he wants to see how far he can push the poor fox to keep holding it in. But first Fennix is gonna have to stop leaking for a few minutes...if he can.

-----
Part 2 Story

Fennix continues to struggle containing his leak from his overfull bladder. But after a few more grunts and curses muttered under his breath, he managed to stop leaking for now.

Wendell: "See? You got this."

Fennix doesn't even say a word or make eye contact with Wendell. All of his attention is focused on not losing control of his bladder again. Nearly every muscle on his lower body is tensed up, and he feels that if he lets his guard down for even a second, he'll lose all control. He starts breathing heavily and rapidly while sometimes letting out a grunt or a soft moan.

Wendell: "F-Fennix? You okay?"
Fennix: "I...I...Ah...NO!...I c-...I can't!"
Wendell: "Not with that attitude." (laughs)
Fennix: "Sh-shut it!"

Despite his best efforts, Fennix becomes overwhelmed by the sheer amount of pressure and swallows his pride; he no longer thinks he's winning this contest. As soon as comes to terms with his imminent defeat and eases up, he feels a larger spurt escaping from his bladder lasting nearly two seconds before stopping it with his hands.

Fennix: (heavy breathing) "No, no no...ah...FUCK!...You win!" (whimpering)
Wendell: "Giving up already?"
Fennix: (growls then whimpers)

Fennix struggles to stand up from the couch as he wanted to make a break for the bathroom door. Once Fennix was on his feet, he realizes how much he underestimated the weight of his bladder as the shifting caused a strong pang followed by another large spurt of pee leaking out. He covers and firmly grasps his crotch area with both of his hands to slow the leak for now. Then he starts to quickly but carefully shuffle his way to the bathroom door while still slowly leaking and leaving a trail of pee behind him.

Meanwhile Wendell couldn't help but feel amused and even slightly aroused by the sight of this poor fox losing control of his overfull bladder, all while having an overfull bladder himself that'll burst soon. Wendell also blushes while watching Fennix shuffle away and noticing the white part of the fur on his rump wet and stained yellow from the puddle he was sitting on earlier. 

Now that he thinks of his bladder, Wendell realizes he doesn't need to hold all of that pee in anymore since he won the contest. Wendell tries to follow Fennix to the bathroom, hoping he can relieve himself too, but he's too late as Fennix slams the door shut before he could enter the room. Before Wendell could reach for the door handle, he hears the sound of the door being locked.

Wendell (thoughts): "Damn it! Oh okay. Maybe he needs some privacy. That's fine. I can wait...I think. Please hurry."

Unfortunately this was the only bathroom in the apartment, so Wendell patiently waits by the door while slowly pacing and shifting his legs, ready to bolt for the toilet as soon as the door opens. However his patience begins to wane as soon as he hears the muffled sound of a jet stream of pee hitting the toilet bowl followed by a loud sigh of relief and moaning from Fennix. Upon hearing these sounds, Wendell feels his bladder pushing harder to empty itself, followed by a spurt of pee escaping from him and hitting the bottom of the door and the floor below it. He grips his crotch with both of his hands and squeezes his thighs together to stop the leaking for now.

About 2 minutes has passed and the sounds of Fennix's relief is still ongoing and audible behind the locked door. So far every second of it has been torture for Wendell as he is still waiting to drain his overfull bladder. Then Wendell finally hears Fennix's stream fade out, so he starts knocking on the door to hopefully get Fennix's attention.

Wendell: "H-hey. Y-you almost d-done? C-can you unlock the d-door...please?"
Fennix: (sigh of relief) "Yeah I'm done now. Well...actually I really need a quick shower to wash all this pee off my fur."
Wendell: "But...but at least let me p-pee first...p-please?"
Fennix: "No, I don't need you staring at me again." (chuckles) "You can come in after I wash up, okay? I promise it'll be quick."
Wendell: (whimpers) "Y-you know you're gonna have to clean the floor. E-even if I pee here."
Fennix: "Hmmm...worth it." (giggles) "Or you can just be a good boy and wait your turn."

All of a sudden Wendell feels a strong pang in his bladder, causing a large burst of pee to slip through his hands. He tightens his grip and tenses his thighs and pelvic muscles even more to stop the leak. Wendell loses all of his patience and starts banging on the door with his right fist while still gripping his crotch with his left hand. He continues to beg Fennix to unlock the door as he is only seconds away from losing all control.

Wendell: "FENNIX! PLEASE! I...I-I can't hold it anymore!" (whines loudly)
Fennix: "What do you mean 'you can't hold it?' I thought you were a champ at this."
Wendell: "I-..." (grunts then whines) "Oh fuck...I-I-I CAN'T!...PLEASE!"
Fennix: "Not with that attitude."
Wendell: (weak voice) "F-Fen...pleeease." (whimpers)

Wendell's whimpering and begging is then abruptly cut off by the sound of running water coming from the shower. That sound triggered an even stronger wave of desperation with no sign of letting up this time. Wendell tries his best to regain control, but he quickly becomes exhausted then starts feeling some more warmth and dampness on his hand and the fur on his inner thighs. Wendell looks down and sees a large yellow puddle already growing beneath him, similar to the puddle Fennix made by the couch earlier before losing the contest.

Wendell panics and starts banging on the door again. There was no response but the continued sound of running water from the shower, and also the sound of spurts of pee hitting the door and falling onto the floor below him. He looks around for potential places to continue relieving himself, but even if he found something he could no longer move his legs due to the overwhelming pressure in his bladder pestering him to continue relieving himself where he's standing. So the poor wolf decides to relinquish his grip from his crotch, finally relax his muscles, and continue peeing on the door in front of him while looking down and watching his distended bladder slowly deflate. At least Fennix is gonna clean all of that up anyways.

About a few minutes pass and Wendell is nearly done relieving himself, yet there's no sign of Fennix being nearly done with his shower. Even though he won the holding contest, Wendell feels defeated because he didn't get to properly relieve himself and that Fennix got to humiliate him first. Out of shame and exhaustion, Wendell kneels down on top of his huge puddle and continues to wait by the door. He finally hears the shower come to a stop, then a few moments later he hears the sound of the door finally being unlocked and opened. Wendell glances up and sees Fennix wearing nothing but a towel wrapped around his waist.

Fennix: "See. I told you it'll be quick-...oh" (stifled laughter)

Fennix looks down and is immediately greeted by Wendell trying to hide his face while on both of his knees on top of a huge yellow puddle.

Wendell: (soft whine)
Fennix: (mocking tone) "Awwwww! Did the poor puppy had a little accident? And you said I was the one who needs a diaper?" (giggles)
Wendell: (blushes) "Oh shut up. I still won. And you're the one that's wearing a diaper at some point."
Fennix: "Yeah yeah, a deal's a deal. We'll talk about that later. Go clean yourself up. I'll get the mop."

Wendell slowly stands up then makes his way past Fennix and to the bath tub. Before Fennix could step out the bathroom, he realizes that there's no way he's stepping over that puddle Wendell created.

Fennix: "Dammit Wendell! You couldn't pee away from the door? I can't step over all of this."
Wendell: "Hey, I begged you to let me in. That's on you."
Fennix: "Ah fair enough. I'll just wash up again after cleaning all of this up. Still worth getting you to piss yourself though." (giggles)
Wendell: (chuckles) "Ah shut up. You're also gonna be pissing yourself soon. Don't forget that."

Fennix steps out of the bathroom and immediately gets both of his feet soaked with wolf pee in the process. He heads to the kitchen area to grab the mop and cleaning supplies, then looks around to observe everything he has to clean up: the puddles by the couch and on the couch, the wet trail leading to the bathroom door, and the huge puddle by the bathroom door now spreading to the living room and kitchen areas.

Fennix (thoughts): "Damn, we both really had to pee! This is gonna take a while to clean up."