1 - 20 of 73 Works in Bara Underfell Sans (Undertale)
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A rewrite of a previous fic, changed structure and story and more Sans' to have sex with.
Years have passed since the barrier had fallen and freed the monsters. You had your found family with them, Sans in particular being your best friend and support. You heard of SOULmates and how monsters have them, you wondered yourself if humans also had SOULmates, and you find out as you begin to travel through different Undertale AU's just how SOULmates and SOULs work through the multiverse.
*I DON'T USE Y/N*
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Why does he know so much about me?
Everywhere I turn, he's there
Anywhere I go, he's with me
I cant even think without him being in my thoughts
How does he know so much about me . . . .
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Nightmare(s) at the Museum by Cantal3ar
Fandoms: Undertale (Video Game), Night at the Museum (Movies)
05 Nov 2025
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Welcome to the night shift of the Doodle Sphere! Are those statues moving? Nah, it's all in your head, but things don't get started till the Pharaoh's out of his tomb. Except, something's wrong. Dream, are you okay?
Basically, Night at the Museum two in the vast Undertale Multiverses.
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Sans looked at the ceiling in pure boredom, unable to sleep as he listened the guards opening the gates of the inmates one by one. It didn't take long for him to hear a guard slamming his club against the bars of his cell.
He'd been told a doctor wanted to do check up on all the inmates, so he didn't really question it when he was forcibly pulled out of his cell so early.
Being pushed around wasn't fun, but at least it was exciting to meet new people that weren't convicts. They had a tendency to be assholes and not appreciate his humour anyway.
"Sans?"
He saw you, with half on your face covered by a mask as your eyes squinted in curiosity.
You were looking at him so intensively, it almost made him feel uncomfortable.
"Please, have a seat."
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I'll Buy Ya Dinner Later (Kinktober 2025) by merrinbrite for Sinsational_Sinnabon
Fandoms: Undertale (Video Game)
04 Oct 2025
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Prompt: Strangers
Bara Sans Underfell x Reader
Series
- Part 1 of Merrinbrite's Kinktober 2025
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You hear yelling as you step out from the bathroom of the bar. You had left Sans alone for a minute thinking he'd be fine as he'd only had one shot before you left.
Oh, how wrong you were.
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Sans gets drunk and flirts with you. You guys have sex. Hooray!
This is my first fic please don't judge me too harshly. -
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Red gets out of prison after doing federal time. And with his freedom he is ready to get back out into the world and get his revenge. There's a lot going on and he just has have his hands in it especially if it leads him back to the snitch that got him locked up.
There is no SansXReader in this one. And I will explain why in the story so if you don't like that particular style of writing you may go past this. But if that doesn't bother you, welcome come on in, I hope you enjoy this debauchery.
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Xena Stone is the therapist for all monsters to help them get most acclimated into society. She has worked with countless monsters with reintroducing them into society for 5 years.
One day a very large skeleton walks into her office.
And her calm peaceful world gets flipped upsidedown.
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Sans wasn't planning on getting himself a slave. There were just too many mysteries surrounding the human to just let them go. Sans was going to find every little secret of theirs if it killed him. Make no mistake, it was likely to kill him. If only the human would stop sucking up to his brother.
Or in which, the author is sick of people using slave fics to make reader a broken/submissive doll and Sans a dom butthead, so author makes their own story and gleefully tramples over some cliches.
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Bewitched, Bothered, and Bewildered by CrimsonAndCloverOverAndOver
Fandoms: Undertale (Video Game), Mafiafell - Fandom
08 Jul 2025
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Cherry Sweet is a rather unconventional performer at a club like 'The Velvet Crop' with her thick thighs and plush stomach, but she does well enough for herself. The patrons enjoy a bit of variety, but what will she do when she attracts the attention of a monster--and a mob boss monster at that?
Featuring a 1920's vibe with music from the 20's-60's, a meet-not-so-cute developing into a partnership, and a spitfire, plus-sized FMC. I hope you all enjoy!
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Mermaids are the social butterflies of the sea, living in sunny, shallow water together with the rest of their school. On the other end of the spectrum, meroctopuses are violent, antisocial fucks who like the cold and the dark, and who basically kill any competing predator they see.
But they aren’t stupid.
Red is proof of that, using his traps to hunt for food and saving his energy to ward off predators. So, how does he react when he finds the laziest creature in the ocean stealing his catch?
Bribe him with more food in exchange for peaceful company, of course! The ocean is fucking lonely for giant predatory mer!
Red unwittingly gets saved by those peaceful conversations. Apparently even a cold-hearted predator can fall in love. And from there, their family keeps growing as more lost souls are saved by the siren’s call that sings of peace, love, and family, no matter how terrible of a monster you were in the past.
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A determined detective wants to get rid of the mafia that has been infesting her city for decades.
She goes undercover as a waitress in a restaurant where mobsters tend to gather and there, she meets Red, the only monster involved with the mafia she's ever met.
She starts befriending him, to the point of actually getting worried about his well being if she were to take action against his group. -
Can't Remember To Forget You (Fell Sans x Reader) by Robyne_Byrd
Fandoms: Underfell - Fandom, Underverse - Fandom, Undertale AU - Fandom
02 Apr 2025
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When you moved to the new monster/human city, you wanted to just start again. Having lost everything back home, you don't want any new attachments. But longing for physical contact has you making a few too many poor decisions, Including making out with the monster Bassist of the band Messengers Of Hell, Sans the Skeleton. What you thought would be a quick hit of feeling needed quickly evolves into a painful situationship.
Will you put aside your doubts and worries to take sans on his offer of "true love"? Or will you pick a somewhat normal life, keeping this as a bittersweet memory?
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he’s got you on your knees with that formidable cool by spittinglass
Fandoms: Undertale (Video Game)
07 Mar 2025
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“Watch it, pet. Just because Frisk likes you doesn’t mean I have to.”
(Or: the one where you’re Frisk’s interpreter, Papyrus is their bodyguard and you aren’t sure if the pay is really worth it.)
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A person... perhaps you or idfk are going to school. They live in a world where there are only humans, no magic, no monster, nothing. We all know this is boring, you only got your games and what not to entertain this war thirsty world.
That is until a certain glitch in the Multiverse system causes a portal to appear. Its not supposed to be there but at the same time it needs a person. I mean, he almsot sucked in the janitor. Imagine that, just a dude sitting in front of Sans pointing fingerguns- wait, im getting off topic. Right! You arent a janitor, you are a random person with a random ass friend in your life. And you get sucked into the portal and land in a canon Fell Sans' chest. If one of you calls him red ill-
- Language:
- English
- Words:
- 2,163
- Chapters:
- 1/?
- Kudos:
- 1
- Hits:
- 31
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Summary
👎︎✌︎☼︎😐︎ 👎︎✌︎☼︎😐︎☜︎☼︎ ✡︎☜︎❄︎ 👎︎✌︎☼︎😐︎☜︎☼︎
❄︎☟︎☜︎ 👎︎✌︎☼︎😐︎☠︎☜︎💧︎💧︎ 😐︎☜︎☜︎🏱︎💧︎ ☝︎☼︎⚐︎🕈︎✋︎☠︎☝︎
❄︎☟︎☜︎ 💧︎☟︎✌︎👎︎⚐︎🕈︎💧︎ 👍︎🕆︎❄︎❄︎✋︎☠︎☝︎ 👎︎☜︎☜︎🏱︎☜︎☼︎
🏱︎☟︎⚐︎❄︎⚐︎☠︎ ☼︎☜︎✌︎👎︎✋︎☠︎☝︎💧︎ ☠︎☜︎☝︎✌︎❄︎✋︎✞︎☜︎
❄︎☟︎✋︎💧︎ ☠︎☜︎✠︎❄︎ ☜︎✠︎🏱︎☜︎☼︎✋︎💣︎☜︎☠︎❄︎
💧︎☜︎☜︎💣︎💧︎
✞︎☜︎☼︎✡︎📬︎📬︎📬︎
✞︎☜︎☼︎✡︎📬︎📬︎📬︎
📬︎📬︎📬︎✋︎☠︎❄︎☜︎☼︎☜︎💧︎❄︎✋︎☠︎☝︎📬︎📬︎📬︎
📬︎📬︎📬︎
🕈︎☟︎✌︎❄︎ 👎︎⚐︎ ✡︎⚐︎🕆︎ ❄︎☟︎✋︎☠︎😐︎ ☼︎☜︎✌︎👎︎☜︎☼︎✍︎____________
Reader is a struggling AFAB individual who just needs a break from life. Won’t happen anytime soon though because crushing on your OLDER roommate is totally a good idea. Who knew skeletons could be so appealing…
- Language:
- English
- Words:
- 1,164
- Chapters:
- 1/?
- Kudos:
- 11
- Hits:
- 132
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Monsters Don't Do Background Checks by saltedpeppermintmocha
Fandoms: Undertale (Video Game)
20 Jan 2025
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Moving across the country and starting your life anew on the basis of a rumor may not be the smartest thing you've ever done...but, well, you're here.
If only you could stop running into that asshole skeleton, life would be pretty good.
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Kinktober Day 12 - Anal/Pegging (UF!Sans/Reader) by NalaNox
Fandoms: Undertale (Video Game)
22 Oct 2024
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Sans admitted to you about a kink of his being pegged, you are more than happy to give it all to him.
*I don't use Y/N*
Series
- Part 12 of Kinktober 2024
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After a hard week, Sans and you decide to play, him as your wonderful, good pet. He acts up for a moment so he services you and then for being a generally good boy, you give him the orgasm he deserves.
*I don't use Y/N*
Series
- Part 6 of Kinktober 2024
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I don't know I got bored. Mostly just me rambling into a word document. Don't expect much from me. Serious lower your expectations. Or F chubby Reader insert x Underfell sans where reader is an art professor in college at Ebott city. Reader likes to draw things from life and finds herself regularly going to parks and cafes and..... stuff ensues following these actions. Sans is a mechanic. Both are broke. This is about reader being inspired by real life and enjoying what there is in life. So... yeah no this isn't going to be a fairytale with her finding a random dude (Sans) and him being rich and reader becoming a sugar baby. They both work jobs that don't make them rich.