Sans AU One-Shots

❀Fell❀ || pet.

Pairing: UnderFell Sans x Female Reader
Prompt: The only reason you're alive is because Sans slapped a collar on you like a damn dog, but after being his bitch for so long, you've found you enjoy it more than you thought you would.
Type: smut
Length: 7.2k words
Background: The Underground is a cruel and merciless place, with each monster desperate to claw their way to the top in any way they can. Some choose to train for the Royal Guard, others try to kill a human to take their soul, and you? You're just a human caught in the middle with no way home.
Notes: A word of warning: Y/n goes through it in this one, and it's heavily implied she's into the whole submission/degrading/pain = pleasure/wearing a collar & leash thing that Fell likes to do (or at least I feel like he'd be into). I wanted to try my hand at something more 'aggressive', I suppose, but in a controlled setting where the characters are into it - that's kinda a requirement, after all. 

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A sharp crack echoed off the surrounding pine forest as I jerked back, the immediate smell of iron warning me something was very wrong. My hands flew to my face, cupping around my nose to try to catch the blood before it dotted the white snow under my feet, but it slipped through my fingers as I coughed. The dog monsters yipped with excitement, and while I may have been able to escape 1 by running off, there was no chance I could evade all 5 surrounding me.

I didn't see the next blow coming until it was too late, and I hit the ground with a grunt as a puff of snow shot into the air. It came raining back down on top of me, covering my already shaking body with goosebumps, and I glanced up as the dogs crept in closer with barks of laughter. This wasn't good - I wasn't sure how long they'd be willing to play with their food before killing me, and the fear clouded my ability to think so I could do nothing but panic and curl into a ball. The fluffy collar around my neck dug into my chin, and I watched with teary eyes as Lesser Dog drew his sword to bring it crashing down on top of me.

The sound of a skull cracking made me flinch, but it wasn't mine. Lesser Dog collapsed to the ground, his skull split open with a jagged bone through his eye, and I scrambled away from the body with a yelp. The dogs all turned to the threat, only to freeze in place when my back hit a pair of legs. I couldn't breathe, fear sending my heart racing but the adrenaline did nothing to spur me into moving. Like always, I was paralyzed.

A bony hand reached down to feel for my collar as the dogs watched with varying levels of fear, and I tilted my head so he could feel the red leather. A sharp phalange drug across my neck as the hand retreated, and I swallowed harshly while debating whether I would rather die to the dogs or the Great and Terrible Papyrus, Captain of the Royal Guard. But I couldn't make my decision in time before the hand returned to my neck.

I jolted when I heard a metallic clink of a leash clicking around the front of my collar, and my eyes shot skyward to see it was Sans instead. Instant relief made me smile, ignoring the blood dripping down my face, but he noticed and the scowl his face was already twisted into became more furious. The dogs took a step back as Sans tugged on the leash, pulling me to my trembling feet.

"Heya, pet." His grin stretched wider than was anatomically possible as he cocked his head at me. "Who gifted you that fucking shiner?" I didn't have to say a word as Greater Dog instantly dropped to all fours and darted away, but his retreat was cut short with a bone summoned out of the ground under him, spearing him in place. His legs kicked in the air, a whimper escaping his mouth as his tongue lolled out, and the other dogs stiffened, eyes flighty while they refused to run and meet the same fate.

Sans grabbed my chin, turning my head back and forth to inspect my sad state, and my blood trickled onto his white bones. His teeth pulled back in a sneer as he shook his hand out, flicking the blood onto the snow. "Clean yourself the fuck up." I reached down to grab some snow, shivering as I used it to wipe the blood from my face with trembling, slow fingers. I stayed close to the ground as Sans met eyes with each of the dogs and told them to stay away from his property. His language was too awful to repeat, and when he was done, he tugged on the leash to pull me back to my feet.