Fionna squinted down at the array of petri dishes neatly spread across the seat of the large, flat throne. If she squinted, she could just barely make out the thousands of specks that populated Princess Bubblegum’s latest pet project: The Speck Kingdom.

A collection of millimeter-high metropolises barely creeping over the lip of each lid, connected via an intricate network of fibrous tubes and shuttle chutes. It was a microscopic marvel, one that Fionna grew anxious just watching.

Each distant footstep from her and the princess must’ve been like an earthquake rattling the foundations of the speck-society. A single bead of sweat could cause mass flooding, drowning countless speck-souls in her salty sweat. And if she wasn’t careful, her stale morning breath could scatter millions to the wind in an instant.

Fionna composed herself and carefully rose to her feet, trying to put some distance between them. “So uhhh what kinda adventure did you need me for, PB?” She asked, scratching her head.

“Well, it’s… more of a study, really.” The princess replied, shuffling together some important-looking paperwork.

“Oh.” Fionna blinked. “And what’s with the fancy chair? I don’t suppose it’s for… all of these guys, right?” She gestured vaguely in the direction of the Speck Kingdom.

“Crown Royalty beeswax,” Bubblegum replied matter-of-factly. “You need a throne to have a Princess, and you need a Princess to have a Kingdom.”

“Right, right…” The prospective adventurer nodded along. “So… What’s this have to do with me?”

“Oh, I need a census taken of the Speck Kingdom.”

“CENSUS!” Fionna repeated excitedly, not knowing what it entailed. “Umm…”

PB handed her a clipboard and pen. “I need you to write down the names of everyone who lives there and what they do.”

“Awww but there's like a BILLION of them down there, it’ll take forEVER.” Fionna pouted.

“Yeah so I need you to ingest this,” PB said, unveiling a vial of frothing green science.

“Whoa what’s tha—”

“DON’T TALK JUST DRINK MY SCIENCE!” She belted, forcing Fionna’s mouth open and pouring the concoction down her throat. 

It tasted… mathematical.

Which meant bad.

“What WAS that???” Fionna asked, coughing up geometric backwash.

“Shrink juice,” PB replied, writing something in her notes. She looked up from her science scrawlings and grinned madly. “Now you’ll be able to talk with the Speck Citizens 1-on-1, at their size!” 

Fionna blinked.

“THAT’S GONNA TAKE EVEN LONGER—”

A zip coursed through her body, and she was weightless. Free-falling through the air like a donkey-brain bird, she barely had time to process the instantaneous shrinkening of herself, and the embiggening of… everything else.

A vast, pink wave slid into view as the world rushed past Fionna, and she fell face-first into its spongy, gummy cushioning.

Fionna sat up, groaning. “Ughh PB… P… B…” Her voice evaporated as she was assaulted by the enormity of Princess Bubblegum. She instantly shriveled up and blushed as the titan delicately cradled her in her palm.

“IT WORKED!” Her sugary breath blasted her. “MY SCIENCE IS POTENT!”

It was nearly enough to send her flitting across PB’s lab, luckily the sticky gum-flesh held Fionna in place as a delicate pair of tweezers pinched her by the scruff of her shirt and hoisted her up before the great pink behemoth.

“Whoops… Sorry about that. I might’ve gotten a little too excited.” Her soft, playful giggles were magnified to godly levels for the shrunken girl, staring in awe at the towering scientist. Her massive, round glasses reflected the light like twin suns in the sky, and her simple smile stretched on for miles.

Fionna wondered if the Speck Kingdom recognized her as a creator-god of some sort…

She supposed she’d find out soon enough, as another pair of tweezers delivered a tiny pen and clipboard and she remembered what she’d been shrunken down for.

Ugh, census.

Princess Bubblegum beamed as she lowered Fionna down towards the buzzing collection of petri dishes. “I’ll be in my soundproof study running a few calculations. I SHOULD have that Grow Juice ready in a few hours!”

Fionna pouted, trying to mask her fluster. She should’ve been more upset that PB didn’t already have something formulated to reverse her shrinkage, but…

“Aww, don’t worry… If it helps, I think you’re kinda cute like this!”

Fionna blushed uncontrollably. She didn’t appreciate being shrunk to the size of a speck against her will, BUT…

BUT she had a job to do, Fionna told herself as she neared the Speck Kingdom.

What were once barely-noticeable sugar-grain-sized structures came to tower over her like intricate skyscrapers as Bubblegum finally set her down among the silent city streets. All the microscopic metropolis’s inhabitants had frozen in shock and reverence.

“Alright, have fun down there! I’ll be back to check up on you soon!” The titanic princess winked at her and scurried off. “Viel Glück!!!"

As the rumbling footsteps faded, Fionna nodded with determination and approached the nearest dumbstruck Speck Citizen, ready to start her biggest adventure yet…

“Excuse-me-sir-would-you-mind-answering-a-few—”

It hadn’t even been an hour and Fionna was already tired of this man-on-the-street schtick. As it turned out, aside from being the size of, well, specks, the denizens of the Speck Kingdom were extremely boring.

They all worked in boring, gray buildings doing boring, gray jobs and went home to their boring, beige houses and boring, gray families. Everything ran like clockwork in a Kingdom where the seconds ran like minutes and the minutes ran on for hours due to some time-space-distortion thing Simon or someone else had talked about once.

Something about celestial bodies.

If Cake was here, she’d probably say something about having a “Celestial body” herself.

Where was she anyway? Fionna thought, wiping the sweat from her brow and leaning against the cool plastic wall of what she now knew as Dish 2. She hadn’t seen her feisty feline companion since it’d been confirmed that everything in the kingdom was, in fact, made of candy, and Cake had immediately started eating the castle’s drywall.

Maybe she should’ve tried some after all—

A series of booming earthquakes rhythmically shook the city. 

Someone was coming, but who?

It couldn’t have been the princess, she recognized her royal footsteps as being soft and light on her heels, as if purposefully trying to avoid an impact. These thundering stomps were clumsy and careless, like they belonged to some reckless, scatterbrained—

“OH CRAP, CAKE!!!”

A massive figure billowed into the room, bringing a foreboding gust of wind with the air it displaced. It was a round, squat shape that nonetheless towered far, FAR above the heads of every speck-citizen and one speck-sized girl.

It was the one thing Fionna had always secretly dreaded.

A colossal Cake the Cat.

“HEY, FIONNA!” The incoming giant boomed, munching on a graham cracker hunk. “You would not BELIEVE what the drywall is made out of here!”

“...Fionna???” Cake’s voice rolled over the miniature skyline, rattling rooftops. She glanced around the empty lab and called out, “FIOOOOONNAAAAA!!!”

As windows shattered across the Speck Kingdom, Fionna covered her ears and yelled, “CAKE! STOP!!!” 

Over the rumbling caused by her partner’s mere presence, she realized that the massive cat couldn’t actually hear her—Let alone see her at this size.

She was just another barely-visible speck to the clueless cat…

As she explored Bubblegum’s lab, her gaze eventually fell upon the vast throne in the center of the room. Cake cooed with curiosity, approaching the microscopic civilization and leaning in for a closer look.

Fionna grit her teeth and pressed her back against the vast wall of the petri dish. “Ohh Caaaake…” She groaned, along with the rest of the anxious millions as their intruder loomed over them menacingly.

Cake’s eyes swept across the throne, glinting with intent. She quickly shoved the rest of her graham cracker snack into her mouth, and brushed off her mouth, causing a plethora of crumbs to rain down over the Speck Kingdom.

It was less of a hail and more like a meteor shower—the apocalyptic kind. Colossal crumbs battered the micro metropolises, blowing holes through buildings and crushing cars by the dozen. Fionna leapt out of the way right as a huge hunk of a crumb came crashing down right next to her, still burning from the Speck-atmosphere.

“Cake, be careful!” She wailed in vain, knowing it’d never reach her ears.

Didn’t she see them down here???

“Now THAT is a seat fit for a Queen…” Cake finally boomed, completely glossing over the microscopic civilization it housed.

Fionna felt herself withering away inside.

Sh-she wouldn’t just… plop her BUTT down on someone else’s chair, would she???

“...And it’s gonna take some Queen-sized buns to fill it!” Cake cackled like thunder. 

Of course she would.

The titanic cat spun around, showing off her smooth, rounded backside. Sticking her thumb in her mouth, she blew and instantly inflated a pair of bulbous butt cheeks, each the size of a hefty medicine ball—scratch that, yoga balls. The massive, meaty orbs wobbled with menace, casting the kingdom in shadow.

Fionna squawked.

Oh, this was WAY worse than she tho—

“BUTT-SIT!!!”

Cake eagerly spilled across the seemingly-empty throne, her shapeshifted cheeks swallowing up every inch of royal real estate.

In an instant, the ocean of her rubbery butt-flesh washed over the Speck Kingdom, smothering everything and everyone underneath her.

Pressed face-first into the plush behind, Fionna screamed. It was like the air itself had been replaced with her friend’s furry feline ass. There was simply no escaping it.

Things couldn’t possibly get worse, but Cake wasn’t comfy yet.

She ground her overinflated rear into the seat, wiggling from side-to-side. “Forget Princesses, THIS is a throne worthy of a REAL Queen,” She purred, indulging in the feeling of the cushy throne’s armrests pressing up against her generous hips.

Meanwhile, the Speck Kingdom was haphazardly swept to and fro by the colossal cat’s fidgeting movements. One rippling buttock rolled over one of the petri dishes, sweeping its squirming contents across the continental mass before the other cascaded over it and guided them into the dreaded crevice of her crack.

It was a nightmare for the helpless Speck-citizens, one that seemed far from over as she began lifting and slamming each cheek back down, giddily tottering from side-to-side.

“Big ol’ buns, big ol’ buns, I got them biiiiiiggg ol’ bunsss~” She sang playfully.

By some miracle, Cake felt the slightest tinkle of crunching plexiglass beneath her bubbly behind, as the structural integrity failed on one of the Speck Kingdom’s great glass walls. It cracked and gave way, collapsing under only the slightest fraction of Cake’s cheekage, which eagerly ate up the remaining space.

“Hm? Wuzzat??” Cake paused and began to investigate, rocking her hips inquisitively.

Oh, she was DEFINITELY sitting on something. 

Just had to hope it wasn’t anything important, She thought guiltily as she began to shapeshift around whatever she’d flattened beneath these big ol’ bunssss~

Fatty fur-flesh contoured around the shape of each petri dish like suction cups. The shapeshifted orbs of flesh that had made up Cake’s Queen-sized behind slid across her pill-shaped body, repurposing themselves into a makeshift boob-shelf.

Cake blinked down at what looked like a couple broken glass circles filled with… dust?

She picked up one of the shallow dishes, rocketing the residents of Dish 3 thousands of feet into the air. The thousands of screaming Speck Citizens were greeted with an immense eye, the slitted pupil sweeping across the decimated landscape of rubble and ash.

“Mm, looks like some of the Princess’s science stuff.” Cake mused, rubbing her chin. “Wonder if it tastes as good as Gary’s…”

Baking was KINDA like science, so it made sense that Gary’s candy counterpart would’ve inherited some of his prowess.

Besides, if she squinted right, it KINDA looked like a crème brûlée!

The Speck Citizens’ hearts sank as they were lowered before the curious cat’s mouth. It parted, and a plump, prickly tongue slowly slid out, dripping eagerly.

Holding the small dish before her, Cake suddenly hesitated.

But what if it WAS something important…?

…

…Still worth a taste test, probably.

The great pink behemoth scraped along the Speck countryside, abducting thousands of helpless micro-people. Her bristling tastebuds raked across the decimated cityscape, leaving no acre un-licked. The Speck Citizens screamed as the giant’s sandpapery tongue dragged them back into the depths of her dripping maw, savored among her spit.

Cake took a long, curious lick, dragging her tongue across the rough, ashy surface. It was a chalky texture, more like an uneven-grain of powder than a definitive substance. 

“...BLECH! I don’t know WHAT PB was cooking, that’s some nasty chalkstuff right there,” Cake muttered. She spat bitterly, spritzing thousands of screaming specks into the air. Like motes of dust they spiraled helplessly before falling victim to their inescapable tormentor—The lucky ones landed amongst the million-acre forest of her yellow-and-white fur.

The unlucky ones were still in the air the next time she inhaled.

Cake flicked the petri dish across the room, then reached for the next one resting upon her chest. Her clumsy, catty paws nicked the side of the dish, upending another section of the Speck Kingdom. 

The inhabitants of the microscopic metropolis felt their entire world rotate ninety degrees as a massive pad pressed up against the curved glass walls and tilted it violently. The entire city collapsed, careening horizonward towards the abyss that awaited them.

The endless expanse of Cake’s cleavage.

“Whoops, hey!” She said, feeling the infinitesimal dust silt between her shapeshifted chest-orbs. Her surprise and frustration quickly gave way to opportunity as she realized what she had in front of her. “Hey…”

Looks like her big ol’ buns had turned into some big ol’ boobies…

“Hmmmm, I could get USED to these babies,” Cake cooed, pressing her elbows together and puffing out her chest. “Always wanted to try ‘em out for myself!” She groped her breasts playfully, claws digging into the plush, pillowy surface. It was immensely satisfying, but as the colossal cat played with her newfound breasts, the residents of Dish 3 were facing tectonic upheaval.

The very ground itself seemed to wobble and quake like the waves of the sea itself, throwing the microscopic citizens into the air with each boobular bounce. Cake’s body gradually solidified its shape, carving her nebulous boob-shelf into a well-defined pair of breasts, with the unfortunate petri dish caught right in the middle of the massive, heaving breasts.

The shapeshifting cat didn’t even notice the miniature disc careening into her cleavage as she took on a more voluptuous, humanoid form. The cries of the missing speck-millions was easily drowned out by the deafening purring that erupted from her rumbling chest.

“Yes, ma’am, this is the NEW-AND-IMPROVED Cake the Cat!” She beamed, giving her chest one final shake of approval, ignoring the faint feeling of millions of dust-sized citizens lost to the depths of her heaving bosom. “Move aside Princess Bubblebuns, there’s a new Queen in town!!”

Crossing her shapely legs, her eyes fell upon the last little petri dish, dwarfed by the sheer size of the immense tit it rested upon now.

“Oh yeah, almost forgot about you!” Cake said, reaching for the final city of the Speck Kingdom.

Battered and bruised but still standing, Fionna could only watch as her lifelong companion’s paw filled the sky, quickly shapeshifting into a blobbish hand with thick, inarticulate fingers. It was like watching some alien-thing try to recall what a human hand looked like from memory.

Featureless fingerprints clasped against either side of Dish 2’s mighty acrylic walls and hoisted it into the air. As the G-forces threatened to squish her flat, Fionna cried out one last time for the colossal cat to hear her.

“CAAAAAAAAAAAAKEEEE!!!”

Cake rubbed her chin, which she now had. As much as it bored her, she DID wonder what these little dust-dishes were for. It HAD to be some kind of weird science thing the Princess was cooking up, but—

Suddenly her ears perked up, detecting the faintest traces of a whimpering whisper of a voice calling her name. It sounded like…

“...Fionna? Fionna!?”

She jumped and looked around the empty lab. Not a soul in sight, yet—

“CAKE, STOP MOVING!”

“Fionna? Where you at? Quit messing with me, you KNOW I get spooked easily! You sound like you’re really far away! Or… really small…”

Her eyes finally rolled down at the little petri dish in her hand.

Trembling, she brought it up to her face and squinted down at it.

“...F-Fionna?” She waited hesitantly. Just to be safe, she shapeshifted a giant ear and held it up to the tiny plate. Now she could hear what sounded like dozens of wailing klaxons and chittering cries, and—

“CAKE!”

“OHMYGOD FIONNA!” Cake shouted, surprised. The shock of her discovery caused her to fumble with the tiny dish and drop it, spilling its contents all over her newly-shaped body. The infinitesimal debris of a decimated Speck Kingdom sprinkled all across her chest, and a pair of round, heaving breasts.

“CRAP!!!” Cake hissed, realizing too late what she’d done. “Fionna!? FIONNA!!!” She tried parting the fur lining each boob in a vain attempt at searching for the microscopic adventurer, but it was no use.

Oh, she was GONE gone, she’d gotten this mess ALL OVER her.

“D-don’t worry, Fionna!” Cake said, trying to control her panic. Something like this was CRAZY… but it wasn’t impossible in the Land of Ooo, she supposed. “Iunno HOW this happened, but I’m gonna fix it! I just gotta… Yeah, I’ll go find Princess Bubblegum, she can fix this!”

She rose from the broken-in throne and winced as she felt her ridiculous boobs bounce from that simple motion.

“Heh, sorry ‘bout that,” Cake laughed sheepishly, causing her chest to rise and fall like a… Like a horrible, horrible earthquake, probably. “Crap, and that too! Just… Hang on tight, okay? I’m gonna fix this, you can count on Cake!”

And with that, Cake rushed out of the Princess’s lab, desperately searching for Bubblegum.

Each footstep was magnified by a hundred for Fionna, clinging to a single feline hair to avoid being thrown to the wind.

“CAKE, JUST UN-SHAPESHIFT THESE STUPID BOOOOOOOOBBBSSSS!!!” Fionna wailed, an unwitting host atop just one of Cake the Cat’s massive, sloshing tits; The rest of the Speck Kingdom now a permanent resident upon her celestial body.

Minutes later, Princess Bubblegum swept into the lab with a beaker of frothing red labstuff. “Good news, Fionna! I finally—” She felt a slight crunch underneath one of her heels and froze. She slowly knelt and picked up the shattered remnants of a petri dish.

“Scheiße!”