"Shoot. My keys." You grumbled, having heard them jingle on the parking lot pavement after they fell out of your pocket. Due to your hands being full with groceries, you weren't able to simply pick them back up, but luckily you were almost to your car anyway.
 
After heaving the grocery bags onto the trunk of your car, you turned to where you had dropped your keys just a few feet away. Except looking back, your keys appeared nowhere to be found. Not in the spot you dropped them, nor anywhere nearby. You felt a slight panic as you checked your pockets to see if you had simply made a mistake believing you dropped them. Unfortunately, it seemed you really had dropped them. You remain puzzled as you scanned the ground for any sign of them. Without your keys you wouldn't be able to drive home with your freshly bought groceries.
 
Your eyes come across something on the ground where you thought you had dropped your keys. Upon picking it up, you realized it was a distinctly red strand of hair. It didn't appear to be from a human, as the color was much too red, like that of a fox. You were rather new to the area, but you were sure you had heard something about foxes living around here, and to be wary about leaving anything shiny and valuable outside. Could a fox have swiped your car keys so quickly? There was a slight wooded area not too far off from the edge of the parking lot closest to your car. Without many leads to go on, you determined a quick venture through was in order. It didn't feel good to leave your groceries alone as you hurried into the wooded area, so you tried to be fast. Unfortunately it didn't take long before you ran directly into trouble.
 
"Ah!" You yelp in surprise as the ground beneath you gave way. A small circle had opened up directly underneath your feet, causing a swift vertical drop into the ground as if a literal rug were pulled out from under you. Luckily the fall was short lived, and there wasn't even a landing impact since you technically never hit the ground as the hole could just barely accommodate your shoulder span. As a result, you were wedged halfway into the hole at the torso with your legs dangling beneath the surface, and everything chest-up above it. "W-what the…?!" You were somewhat relieved your quick drop hadn't ended with a harsh landing, but on the other hand your arms were pinned to your sides, and therefore had no means of pushing yourself upwards. Your feet attempted to kick around to find anything to push off from, but were met with nothing but empty air. You swiveled your head down and around to try and garner any sort of escape plan from the shape of the hole.
 
"Hmm-hmmm~ Looks like you're a little stuck." A girl's voice hummed almost directly in front of your face.
 
"Wha-?!!" You start, startled to suddenly find a young woman lying on her stomach with her elbows propped up so her hands could cup around her chin and cheeks. She held a content looking grin on her face that bordered on smug, appearing casually devious. "Who are you? C-can you help me out here?" You asked, before her furry red ears on the top of her had tipped you off to what she actually was: A demi-human of the fox variety. You had no idea how she had appeared in front of you so fast like that. "Wait. Are you…?"
 
"Pretty clever to check the foxholes for your shiny stuff back. Buuuut it would have been better for you if you were more or less so." She says with a mischievous glint in her eye. "Probably less if it meant you wouldn't try to outfox a fox." Her tail swished behind her, and you noticed something you hadn't before due to the angle. Viewing her from halfway into the ground as she lies on her stomach, her rear was what you could best describe as mountainous, with each sweatpants-clad cheek likely being larger than a basketball and a half. You were no perv, but that was just simply something everybody would notice pretty quickly.
 
You put that out of your mind for now. "So you took my car keys then?"
 
"These things?" She asked, twirling your keys with her index finger.
 
"Y-yes! Give them back! Please?"
 
"Mmmmmmm…" She mock pondered. "Sorry. Anything left on the ground is mine to keep. That also includes anything IN the ground too, so…" She pushed herself up from the floor and stood up, looming over your half-buried form wedged into the ground. As far as you could tell from your lower vantage point, she was actually pretty short, but with a stocky build accentuated by fat thighs, a small amount of extra chub at the belly and breasts, and of course, an extremely sizable backside. That kind of frame made it all the more impressive when she turned around and dove straight into another foxhole, not getting stuck as you had somehow. There wasn't much time to wonder how she did it or where she was going before you felt something dive into your pocket and abscond with your wallet before you could even react to it.
 
"H-hey!" You complain, kicking your feet around in response but finding no target. The fox girl pops out in front of you holding your wallet. "Give that back! I thought you only wanted shiny stuff!"
 
"I do." She smiled, flipping it open and taking note of all the bills in there. "Perfect." She grins, before looking down at you, her stocky frame casting a wide shadow over you. "Let's get you out of there. I've got something I've always wanted to try."
 
It was nice to hear she was going to help you get out of here, but you couldn't feel too happy considering she was in the process of robbing you. You were trying to formulate what to say and balance toning down your bewildered frustration without swaying her out of helping you. You were for sure planning on tackling her or something as soon as you were able. "Okay, just let me out, please."
 
"Of course. You're not particularly shiny yourself, so it won't matter if I store you where the sun doesn't shine." She informed you.
 
"What?" You asked, although you were even more confused as she instead turned herself around so her back was facing you. She grabbed at the waist of her sweatpants, struggling to tug it down for a moment before it dropped under her cheeks like a revealing curtain. Her ass was already incredibly large contained within the form-fitting sweatpants, and its sudden exposure had it spill out to its full size, somehow looking even more plump and weighty is it wobbled just a bit before settling. Her moon loomed over you, threatening to eclipse you at any moment. Your eyes widened in shock as you never thought that you could be so intimidated by an ass alone. "W-wait a minute. What are you doing?!!"
 
"Claiming." She answered as she looked over her shoulder, giving a cheek a soft slap, allowing you to see the ripple run through its excessive mass.
 
"Wh-"
 
*WHOOSH!!*
 
The fox girl bent her legs and thrust her rear downward. The motion was incredibly abrupt and swift, and yet everything appeared to move in slow motion to you. Your widened eyes stared helplessly at the pristine wall of flesh descending rapidly where you remained trapped, consuming more and more of your vision until all you could see was the skin of her cheeks and the crevice formed between them. The warm sensation of her ass-cheeks pressing into your face-cheeks was not long after that, with her doughy mass parting slightly and giving your head and neck nowhere else to go but between her orbs.
 
The natural weight of her mass would not stop nor even slow down for your presence. Her hips were wider than your shoulder span, and as such they too were easily welcomed into the cramped space between her cheeks, only allowed as much space as they took up. Your arms being pinned by the hole in the ground was seamlessly exchanged into being pinned on either side by her ass cheeks. The edges of the foxhole were smashed open to accommodate her width, allowing her to drop into a brief free-fall deeper underground with you half-way wedged up her rear.
 
*THOOM!!*
 
The fox girl landed ass-first onto her living room armchair, situated underneath where you had originally gotten stuck on the surface. The cushioned impact prevented the rest of your body from shooting directly up her ass, but there was still a good few inches hammered upward into her body as a result regardless. She relished your desperately squirming legs sandwiched between her rear and the chair for a few seconds before standing up from it and strutting over to a full length mirror. Facing away from the mirror, she turned over her shoulder to catch a view of herself from the back.
 
The reflection cast the absurdly humiliating sight of everything from your waist to your feet sticking out from between the fleshy boulders that were her ass cheeks. Your hands, with your arms still pinned to your side, stuck out just barely as well as they futilely attempted to claw your upper body out of the fox you found yourself halfway inside. Your legs kicked helplessly above the ground achieving just as much as your hands.
 
You had been in a daze for a moment, and it took you a little more time to be able to accept the absurd reality you found yourself in, but the memory of her ass falling towards you, and all the current sensations around you made it undeniable. You found yourself in pitch blackness simply because there just wasn't any space in your cramped position for even rays of light. The fleshy walls clamping around you on either side only squished aside as much space into existence as what you filled up between them. You were pinned perfectly in place, greatly restraining your panicked and frantic wriggles within this warm and impossibly stuffy void. Your legs and hands could feel the open air outside, but no matter how you tried moving, pushing, or pulling with them, backwards motion was not achieved. You didn't want to believe what currently was happening was actually happening, but you couldn't think of any other reason despite how impossible this should have been. Her ass may have been big, b-but there was no way that meant she could catch half of your entire being between her cheeks, right?!!
 
"What's happening?!! Let me out!!" You cry desperately, although you're sure that only you can understand exactly which words you were using from the muffled result.
 
The fox girl felt the vibrations of your voice more than she heard it. And the casually content smirk on her face remained as if she wasn't doing something as extreme as dictating the course of your life from now on. "If you fit, you're not coming out~" She warned you playfully, grabbing the waist of her sweatpants and tugging upwards. The extra width of her naked ass would make it a challenging endeavor.
 
*Tuuug*
 
Her first tug was entirely ineffective at raising her pants, as the overhang of her ass effectively acted as a wall against the polyester fabric. It did however squish her cheeks together a little bit, smearing and smooshing you between their warm masses and slightly squeezing you further in as a result.
 
*Tug. Tug. Tuuug…*
 
"HMF?! HHMPH!! HMMMPH!!!"
 
No ground was made in covering up her exposed backside, but you were squeezed deeper with every clench, your hands disappearing with the rest of you, and losing inch by inch of your legs' freedom. Despite having more than half a human in her ass, there was no bulge on the fox girl's belly or ass. Proof of your existence was entirely determined by your legs and feet, which gradually was becoming a rarity as you felt her warmth clamp around your lower body. Her doughy cheeks intermittently clenching around you somehow made your containment feel even more claustrophobic. Before long not even your legs remained, only your feet poking out from her fatty orbs, wriggling as desperately as it was useless.
 
*Tuuuuuuug!*
 
A more drawn out tug at her pants finally managed to make some headway, pulling up the curtain of polyester over the initial barrier of her ass, only to hit another roadblock: your exposed feet. You could feel the band of her sweatpants pushing against your ankles as it was pulled upwards, and some of that force was redirected towards you, pushing your feet slightly further into the fox girl.
 
*Tuuuuuug! Release. Tuuuuug! Release. Tuuuuuuuuuuuuuuuug!*
 
The fox girl, ignoring the vibrations of your voice against the inside of her ass cheeks, continued looking over her shoulder as your feet were forced to fold together upon being slowly pulled into her crack. Her progress garnered the only change in expression she had during the entire process: her eyelids lowering almost imperceptibly, and having her look just a little more smug. Soon, only your toes poked out from the sandwich of her cheeks. "Just a little more, aaaaaaand…"
 
*Tuuuuuuuuuuuuuuuuuuuuuug!*
 
*Plap!*
 
"Done~"
 
With the steepest part of her ass surmounted, and your feet pushed in just deep enough, a final tug up broke through all resistance and slid all the way up to her waist in an instant. She let go with her fingers pointing outward by her hips in a girlish pose, the elasticity of her pants plapping her cheeks as she allowed them to snap into place, bunching her cheeks together once more in its form-fitting fabric. In that same instant, The very last of you was pulled up into her ass, sealed entirely in her all-encompassing warmth. Just like that, you effectively vanished from the world without a trace, sandwiched between her asscheeks and hidden away behind her sweatpants.
 
"He fits so perfectly." The fox girl remarked, and a mischievous glee ignited within her as she imagined walking through town without anyone being able to tell she held an entire human being trapped in her ass. She slapped a cheek and watched it wobble in the mirror, feeling how your trapped form wriggled extra hard in response. She just had to try it out, and so prepared to take a short trip outside.
 
Despite all the evidence literally surrounding you, you still wanted to rationalize what was happening in any other way. It was like being pressed by two bouncy castles that were swelteringly warm, especially when they bounced and wobbled around, smearing you around and creating even more warmth through friction. There was no way you could even guess what was happening in the outside world, except for the motion and general movement of your captor by how much your prison wobbled around you. And currently, it was doing a LOT of movement. "L-let me out! LET ME OUT!!"
 
The fox girl walked with a confident sashay, purposefully swaying her hips back and forth as she made her way to the grocery store. Her naturally large rear bounced within her sweatpants, and her tail swished from side to side happily. "H-hmph mf mph! HMPH MF OUT!!" Muffled cries vibrated her cheeks, which she easily and nonchalantly ignored. She stepped into the grocery store and noted with giddy how many customers there were inside.
 
She paraded through the aisles, not paying attention to any of the products on sale, but rather watching the reactions of all the humans she passed by. Despite the maximum efforts of struggling and pleading for help from a certain trapped human, and no matter how close she got as she passed them by, no customer was able to catch wind of her little secret. The fox girl's mischievous glee and pride heightened her spirits and affirmed to her she made the correct decision on how to handle you. You were her little secret, and the fact she could keep you masterfully hidden away like this was immensely gratifying.
 
She rounded nearly the entire store before ending at a checkout aisle empty handed. The clerk recognized her, eyeing her fox ears and the large tail sticking out from the back of her sweatpants. "Let me guess, change for a dollar?"
 
"Change for many dollars, and only the shiniest coins you have." She grinned, pulling out your wallet and emptying out every bill inside. The clerks eyes widened at the amount she handed him, before wearing an expression that looked like he was making a great effort not to groan in annoyance. She purposefully let one dollar fall from the stack by her feet. "Oops, let me get that." She said.
 
She turned around and bent over, knowingly pointing her large ass directly at the clerk, wiggling her hips as she spent more time picking the dollar off the ground than she needed. "HMMMMPH!! HMMMMMMPH!!!" She felt a voice inside her. The clerk's eyes were drawn to her rear due to its size, and yet despite the attention and closeness, he was not able to pick up upon the desperate peril within. The fox girl finally swiped the dollar from the ground, before turning to see the clerk hastily look away with a blush.
 
"Hee hee hee~" She giggled knowingly.
 
"What's so funny?" The clerk asked.
 
"Can't tell. It's a secret~" She said with a wink.
 
"Whatever." The clerk rolled his eyes as he took the last dollar and opened the cash register.
 
"Shiniest first, then lowest value!" She reminded him.
 
"Yeah yeah."
 
The joy she was feeling from your containment was reversed and tenfold for you. Your mind desperately wondered how and when you'd see sunlight again as you wriggled as best you could in your cramped prison. "S-someone! Help!! Get me OUUUUT!!" You pleaded into the abyss, although the only thing that achieved on the outside world was having her tail swish to the other side. You understood how helpless you were, and the only way you were going free was if the fox girl ever decided to fish you out. You prayed that it would be more accurate to use "when" than "if".
 
The fox girl came home with a fantastic haul of shiny new coins for her collection, and yet as she looked her backside over in her full length mirror, she determined that her favorite new possession was you. She stretched out the back of her sweatpants before letting them snap back into place.
 
*Plap!*
 
*Wobble wobble*
 
"HMMMMMMMPH!!!"
 
She did tell you anything left on or in the ground was hers for the taking. That rule did not stop at you. After one last smirk in the mirror, she strut off to her bedroom to retire for the day, naturally carrying you along with her, and having zero intention on fishing you out from the void.
 
She was so happy that the strand of fox hair she had purposefully left behind had worked.