(Note, the accompanying story takes place in an alternate universe from main FNaF, y'know if that wasn't obvious already)

Its the late 2000's, and you're feeling nostalgic over Freddy's. Your parents used to take you there when you were younger, and you remember loving it there. Sure it was cheap in retrospect, but you could tell that place had some real love put into it. At least...that's what you thought for most of your life.

There have been rumors throughout the years of people disappearing at Freddy's locations. Kids were always fine, and so were their parents usually. But there's been a strange reoccurring theme of adults never leaving the building. Even after police combed through security footage they couldn't figure out what happened. Eventually, they would always enter an off-camera room and never leave, with nothing incriminating being found IN said rooms. It wasn't just guests either, staff such as Nightguards, janitors, even higher ups like managers going missing.

Naturally, this made tons and tons of urban legends surrounding the place, and by that you mean creepypastas. They used to really make your skin crawl, but hearing the 18th story about Chica secretly cooking people into the pizza, or Freddy running around with an axe, or that old puppet thing they used to have trapping people's souls in the animatronics really does desensitize you. But you have noticed something interesting.
When looking into disappearances, almost everyone who has vanished have been troubled in some form. Mentally or emotionally, they come to Freddy's to forget about their troubles...and never return. It was strange.

It was...something you wanted to get to the bottom of. And so, one night, you decide to drive out to the nearest location. This one specifically closed back in the 90's due to low attendance. Cracking the lock open and pushing open the doors, you find the pizzeria remarkably untouched by time. It was exactly like you remembered it, if not a bit less through rose-tinted glasses.

Something was off, though...something was missing.
Freddy was missing, so was Bonnie, and so was Chica. You even ran over to Pirates Cove and sure enough, even Foxy was gone. Where could they have went? You began to investigate the building further, looking for clues about the animatronics' whereabouts. It was so odd seeing this place as an adult, it used to be so full of kids, but now it was a ghost town.

Finally, heading down into the security office, you would find something that could help. It was a cassette player, with a cassette already in it. Most of the film looks to have been ripped out, but there was still some left.
You play it.

"At Freddy Fazbear's pizzaaaa, we'll stuff you until you pop!!~♫"
...
You don't remember that being their jingle, it sounded perfectly identical to the chain's usual theme, it even had the same singer...yet something was wrong.
...
You would hear a door creak open on your right, it was the kitchen. When you first entered, it was locked. Heading over to it now...it was wide open, yet inside it was dark. Impossibly dark, pitch black.
...You stepped inside, and felt yourself falling.

...
*BWOOMPH*
...
You felt yourself land on something soft, before the overwhelming smell of pizza became noticeable. You got up...and found yourself not in your own body. Where a human once stood was now a tall, white fox with orange accents and purple lipstick...
That wasn't even the strangest thing! Looking around you...you saw immensely bloated shapes, throbbing, pounding, slamming into eachother. At first, it was completely incomprehensible, but the longer you looked, the more you knew what you were looking at.

It was dozens of taut, swollen balloons of fat. Their bodies stuffed to the brim with pizza, their features softened and bloated, sunken in and overgrown. All facial features were gone, save for ears and eyes, the former reduced to taut, round balloons, and the latter reduced to intense, bulging spheres of rubbery flesh, constantly bulging out more and more as they gorged. Their limbs were nothing more than rounded, tight nubs, completely incapable of anything but flailing and stomping around on...speaking of, around each and every one's waist was these tight, intensely stretched pieces of clothing...were they all wearing mawashis?

Just then, you felt a suddenly rather filling sensation, as enormous wheels of pizza began rolling towards you, flying into your mouth without you chewing even once! You were being STUFFED!! Your body bulked up more and more, your small frame rapidly bloating with round blubber, as you felt something tight being wrapped around your waist. And you were forced into the ball pit of indulgent gorging before you could even process what was happening...but with your growing form...you had an epiphany just as your own eyeballs began to push out and bulge, realizing what all this was...
and being filled with joy over it~

This was what had happened to them all. Every single one who disappeared, wherever this...place was? They all ended up here, transmogrified into a truly living version of the character they best fit, and left to grow, to gorge, to wrestle, bounce, and party~ Their lives weren't mysteriously cut short, they were extended to infinity, extended to a perfect, indulgent lifestyle.

....
...
The year didn't matter anymore, and you were now the biggest of the bunch in Freddy Fazbomb's Endless Sumoparty~ Quite impressive for how comparatively short its been since you arrived, you still faintly remember who you were before you came here!!
But to make up for it, you've long since forgotten your name, it just wasn't important~ You're just called Lolbig now, ever since you caved in and let yourself go, you've become a titan of tight fat with an even tighter mawashi, and you've gotten VERY familiar with all your friends~
Funtime Fatmo is your certified GF/BF, they like to swap around, you don't mind as long as they keep on growing~
Things have gotten alot tighter recently, but even the smaller ones in here have managed to bulk up, you're proud of BombBomb and Bomb-et
Of course Mangrow always loves to push and pull on your eyes, ESPECIALLY after your pupils started getting bulgey, they've always been a hell of a tease, but you don't mind~

Overall? Probably the best decision you've ever made~ Hopefully you're 117,000th XXXXXXXXXXXXL pizza for today comes in soon, you're practically STARVING~
=====================================================

Happy 10 year anniversary FNaF!
I am. So sorry xwx

Every character present in this!
Major: Lolbit(You~), Lefty, Funtime Foxy, Springbonnie, Mangle, Toy Chica, Toy Bonnie, Toy Freddy, Foxy, Bonnie, Chica, Freddy, and Shadow Bonnie/RXQ!
Minor: Mr. Cupcake, Bonbon, Bonnet, Helpy, Caution Sign, and the Mediocre Melodies if you look reaaal closely at the left :p