Commissioned by me
Artwork by shirasiyuki
Story written by  xylenqs

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The canine looked down, eyes wide as she inspected her right shoe... or rather, where her shoe had been. Fay’s maw opened slightly in utter disbelief. It had barely been wet out here, and now one of her heels was completely soaked in muck!
“Wh... how is this possible?”
Really, the explanation hardly mattered. What did matter was her foot starting to slip on the slimy texture under her shoe.
“Woah, w-wait...!”

The swampy bog, of course, waited for no one, least of all a lone traveler in a gorgeous outfit. It wasn’t a particularly strong pull, but it was certainly enough to force the canine to step forward with her remaining paw. Another deep squelch, same as the first, rang through her ears, making her gulp and shudder as her shoe sank all the way down, nearly enough to make the muck pillow over the top and into her sock. Fay caught herself just in time, readjusting her weight to prevent her left leg from sinking too deep... but of course, that meant adding weight onto her right leg instead. The last of her shoe sphlorphed under, making her squeak as the cool, soft muck instantly flooded into her shoe and rubbed against her sock. With a second shudder racking her body, the canine huffed in annoyance.
“Ewwww... my shoes!”
She wasn’t that much of a girly girl, but this outfit was gorgeous! No way was she going to let this stuff ruin her cosplay outfit... or her pretty, white fur!

“Oh, please let there be a river or something nearby...” Fay huffed, looking around the area for a brief moment.
What she should have paid attention to, however... was herself, slowly starting to sink.
Despite only glancing around for a few seconds, that time had been more than enough to really get that sinking feeling. The muck continued to pull her deeper, seeping into her thigh-high socks with relative ease... and the extra weight simply made the canine start to sink deeper and deeper.
Once that sinking feeling truly hit, Fay looked down again in shock. “W-What?! No! NO!” Fay squirmed, trying not to struggle too hard, but enough that she could hope to get out of this annoying muck trying to swallow her legs.
“How deep is this stuff?! This can’t be happening, I just finished putting this outfit together three days ago!”
Of course, the earth didn’t mind its new catch gasping and huffing in annoyance. There was no one for miles to hear but the two of them.
“Come on...” She huffed, trying to pump one leg out, then the other. “...there’s solid ground... nffff... r-right there!”
Though her voice trailed off, her body only started to instinctively struggle more. The thin layer of crust around her frame began breaking apart more and more as her knees and thighs pushed and pumped against it. Every last inch of it gave way to the same, doughy muck she was already standing in... but the fear of what was happening to Fay was far too strong for her to stop.
“...I... I’m sinking...!” She gasped, giving a deep grunt. “C’mon... let me go, please!”

Her fluffy white tail was getting close to scraping the surface, and it wouldn’t be much longer before she was knee deep in this awful stuff.
“Ohhh, where’s the bottom of this stuff already?!” The canine squeaked out, breaths coming a bit faster. Despite knowing she was still sinking, convincing her body to stop squirming—much less convincing her legs to stop trying to lift and tug their way out—was impossible. “It can’t really be this deep!” Fay crossed her arms, snout held high for a moment, then looking down and seeing her right leg very close to sliding down to her knee. “...please... don’t be deep...”
The canine took a deep breath, her right leg slowly bending as she tried to lift it up.
“Okay... okay, Fay... you’re just sinking in mud. No big deal... just... give yourself one good push and you’ll be out of this muck.” Another gulp of air filled her lungs as she readied herself. “Alright... operation ‘stop sinking’... here goes.” Ready to give a good push against solid ground under her left leg, Fay counted herself down.
“One... two... three!”
The white canine pushed hard with her left leg, lifting her right one up at the same time. Sure enough, her right leg did rise a bit, strands of the muck coating her sock.
Glrrrrrphlaph.
Her left leg, however, quickly found itself sinking deep, well past the knee.
“No! Not my sock!” She grunted, nostrils flared.
Past the knee... up the thigh... and with her maw open in shock once again and one leg thigh deep in quicksand? Great, just great... her socks were as good as ruined. Worse than that, though...

Fay knew she was starting to really get into deep trouble.