1 - 20 of 152 Works in Big Sans (Undertale)
Navigation
Listing Works
-
Tags
Summary
Who knew not knocking could lead to you knocking his socks off?
While at school, your friend Papyrus asks a favor, which somehow turns into you taking Sans's virginity :0
Porn with Plot
-
Tags
Summary
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.
-
Tags
Summary
When the rain came pouring down and he turned his back on a second chance at living, Sans knew he was done for.
This was it.
He knew he would turn to dust right in front of the convent he had been eyeing since he was left without a home or anything else to his name.
Then came a nun, reaching a hand out and offering him the mercy he longed for since the moment he stepped away from an easy life.
Now, Sans is determined to make the nun who gave him another chance at life feel as good as she makes him feel.
He wants a life alongside her.
The problem is convincing her out of her reluctance that he's worth the risk of leaving a life of faith behind.
-
Tags
Summary
Once known as one of the best scientists of the Royal Guard, Sans lives on logic and logic only.
He's rejected the idea of soulmates being real, too stubborn to picture it as something remotely plausible.
So, when he starts to gain glimpses of a thin red string tied to his only other human friend besides Frisk, Sans ignores that for an entire year.
Unable to accept his new reality, he drinks himself to near intoxication, and then his drunken self wanders into Grillby's, searching for the woman responsible for making him feel this way.
-
Bewitched, Bothered, and Bewildered by CrimsonAndCloverOverAndOver
Fandoms: Undertale (Video Game), Mafiafell - Fandom
08 Jul 2025
Tags
Summary
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!
-
Tags
Summary
Sans works odd jobs at an apartment complex.
And you, the tenant at 2D, always seem to need his help.
Series
- Part 3 of Smutty Sans/Reader One Shots
-
Tags
Summary
You wake up in an unfamiliar bed, next to a burly man snoring as loud as thunder.
Series
- Part 1 of Smutty Sans/Reader One Shots
-
Tags
Summary
It’s heat season, and your mate Horror has been… managing to keep himself in check. You’ve been nervous about this, you’ve never done it with anyone.
You think… you’re finally ready. And if it was with anyone, you want it to be with him.
Series
- Part 21 of Requests
-
Tags
Summary
Living in a rural town at the back of Mt. Ebbot has given you peace in your life, but it didn't quite feel whole.
Luckily, two newcomers are here to patch that.
-
Turn Around and Count 2 Ten (DISCONTINUED. Will return as a new story in January 2026!) by vidrioborroso
Fandoms: Undertale (Video Game)
13 Oct 2024
Tags
Summary
Just as you're ready to wrap up for the day and hand out the leftover pastries to the folks around town, there's the sound of someone bursting into the bakery and shattering glass.
Frying pan firmly clutched and ready to swing at the intruder, you're met with a skeleton monster standing in front of the broken door, a vibrating dog in his hands and a human child hiding behind him.
"uh..."
He grins wider upon noticing the weapon in your hold.
"i promise this'll make sense if you just sit down and hear me out for a second."
-
Kentucky Ax Murder - Introduction: The Family by BlissofanAngel
Fandoms: Undertale (Video Game)
08 Aug 2024
Tags
Summary
There is nothing like family.
The saying goes; a family that prays together, stays together. In this addition to What's That Piggy-piggy? Axe has expanded his family and in addition to new souls comes new problems.
Yet one thing has remained, they prey together.
Series
- Part 2 of KAM - Horrortale Farm AU
-
Tags
Summary
Romance is in the air and you can't help but feel a little lonely when you see all the couples around you, and you can't shake off the feeling as if you're missing someone in your life, like you haven't met someone important to you.
Little did you know, someone felt the same way! And not only that, he's not even from your universe!
... What?
He's also convinced you're the one he's been missing all this time.
---
For as far back as he remembers, Error was alone.
He decides to remedy that.
Series
- Part 4 of AKA_Indulgence's Longfics
-
Tags
Summary
this is my shot at an ambitious "story" where i really wanna write smut... but chances are ill write smth else i just plucked outta my head
im on hiatus and very tired even tho i did nothing so ill try to revise a lot of this since a lot of this is very fresh from writing (meaning little revision was made)
Series
- Part 2 of MY UNDERFELL SHIT
-
Don't Shoot The Messenger by BuckorNine
Fandoms: Underfell - Fandom, Mobfell - Fandom, Mafiafell - Fandom, Undertale AU - Fandom, Undertale
04 Feb 2024
Tags
Summary
If Casey had just refused that last drink, they wouldn't have been running with the Mafia. As time goes on, however, they realize they wouldn't have it any other way.
-
no title im sick of trying to come up with one by fellsanssimp
Fandoms: Undertale (Video Game)
03 Feb 2024
Tags
Summary
REWRITE IN THE WORKS. THIS WILL NOT BE CONTINUED BUT INSTEAD REITERATED AND MADE (hopefully) BETTER. EACH CHAPTER UP TO 13 WILL BE REWRITTEN AND ONLY THEN WILL BE POSTED.
Series
- Part 1 of MY UNDERFELL SHIT
-
Tags
Summary
Danger was everywhere.
Any mundane task or fun trip could lead to danger. These thoughts linger in the back of everyone’s minds, labelled as anxiety; unnecessary fear; paranoia.
A simple trip to the store and a drink at the bar lead to two kidnappings, and neither you, or the strange and slightly scary skeleton are pleased about it.-OR-
You (The Reader!) and Sans (Underfell!) are both kidnapped by an organisation consisting of both monsters and humans, and forced to live a communal life together.
(Discontinued! Skip to Chapter 12 for some drafted one-shots about Underswap Sans and Underfell Papyrus - totally unrelated to the story.)
-
Tags
Summary
You receive a letter from a loyal visitor, inviting you to join him for a night at Mettaton's new hotel.
Series
-
Tags
Summary
You answer an ad online about a farm needing a hand. But the ad has been posted for a while. You answer up on it and surprisingly get a reply. The city life isn't working out anyway.
You barely think twice and make your way to your new life.
You won't regret this right?
Series
- Part 1 of KAM - Horrortale Farm AU
-
Tags
Summary
"Alouette, gentille alouette
Alouette, je te plumeraiJe te plumerai le cou…
Je te plumerai le dos…
…les ailes… le ventre…
…les pattes… la queue…"
-
Tags
Summary
Papyrus and his Detective partner (you) have to solve a missing persons case. It turns into a huge undercover operation where you still have to rescue the missing person: Sans!
Along the way there's shenanigans, swearing, sex, misunderstandings, bad puns, and you fall in love with your spiky partner's brother.