1 - 20 of 3,068 Works in Sans Ensemble (Undertale)
Navigation
Listing Works
-
Kidnapping the Boss and giving him the happy childhood that he deserves by catdemonakatsukigirl
Fandoms: Undertale (Video Game)
07 Oct 2025
Tags
Summary
When Killer decided to bring some unknown science experiment into the castle, the last thing they expected was time travel. But hey now they have the most adorable baby bones ever, their boss Nightmare who doesn't know who they are and oh yeah is also 5.
-
Tags
Summary
We're back with another year of Inkwhumptobertale!
And this year, we have another twist: another list! That's right: every day, I'll be facing the challenge of eight different unrelated prompts, and I'll have to do my best to cram them all into the story, somehow. Admittedly, there is a low chance of me actually doing that, but I am obligated to use at least three prompts each day, and I'll add more if possible. I'd like to do at least one day fitting all eight prompts into the story at some point in the month, though. So..prepare for chaos!
These characters are not mine!
Series
- Part 4 of Writing Prompts
-
Tags
Summary
Après avoir découvert que tu étais enceinte, ton partenaire t'abandonna
Tu croyais que tu allais te débrouiller en solitaire
Mais la vie décida autrement lorsque tu croisa le chemin de 5 squelettes, ou plutôt 6, qui décidèrent que tu leurs appartenais
Ils ne s’attendaient pas à s’attacher et tu ne t’attendais pas à changer
/
After discovering you were pregnant, your partner abandoned you.
You thought you were going to manage on your own.
But life decided otherwise when you crossed paths with five skeletons, or rather six, who decided you belonged to them.
They didn't expect to get attached and you didn't expect to change
/
Disponible dans les deux langues
Available in both languages -
Tags
Summary
My first Kinktober attempts :)
-
Here Comes the Bride by FandomWorld9728
Fandoms: Undertale (Video Game), Underfell - Fandom, Underswap - Fandom, Swapfell red - Fandom, Fellswap Gold - Fandom, Horrortale - Fandom, Underlust - Fandom
06 Oct 2025
Tags
Summary
You were so excited to finally get married to your long time fiancé, only for him to leave you for another girl with nothing but a note. Lucky for you, your two best friends were there to help you through this rough patch of your life.
Series
- Part 12 of Undertales Across the Multiverse
- Part 8 of Papyrus/Reader Fics
- Part 8 of Sans/Reader Fics
- Part 1 of Here Comes the Bride
-
More Flash Fics for Kridow by Mochimunchies for KridowKMS27
Fandoms: Undertale (Video Game)
07 Oct 2025
Tags
Summary
A short collection of flash fics/oneshots specifically focused around fight scenes for Kridow!
Includes:
Chapter 1 - Ink vs Error
Chapter 2 - Blue vs Murder Time Trio
Chapter 3 - Paperjam & Gradient vs Ink & Error
Chapter 4 - Nightmare vs Fatal Error
Chapter 5 - Geno vs Bad Sans GangSeries
- Part 12 of Flash Fiction Giftfics
-
Tags
Summary
A story about Ink and Co. being space pirates and are living in the vastness of space.
Dream and Nightmare are immortal pirate captains, well known and feared among merchants and other sailors alike as Burning Sun and Kraken.
Ink, also immortal, is a member of Dream's crew and has been his closest friend for as long as he can remember.
It's a dangerous life they live with the guard hunting them down and trying to kill them.
So what happens when Dream and Nightmare get a call asking for help from the very guards that want them dead, offering a full pardon for their crimes if they do.
All they have to do is catch someone who is known as the 'Destroyer' and bring them in, so they can be dealt with permanently.
Problem is, no one knows who that is.Series
- Part 1 of Space Pirate AU
-
Tags
Summary
First kinktober ever, list isn't complete but trust it will be done by Halloween.
Dedicating this fic to my very very special friend of mine. Pookie, if you see this, ily <3
Uh yeah, hope y'all enjoy ^^
-
Tags
Summary
EBOTT CITY, 191X
Three years have passed since the two districts of humans and monsters reunited, leaving their differences, which once resulted in a civil war, behind in order to strive for a brighter future together.
In the area of Roadin, you can find a little stationery shop called "Doodlesphere", owned by a certain skeleton monster: a carefree, cheerful artist and storyteller named Ink. Despite leading a relatively unexciting life up until now, his natural ability to run into trouble causes him to bump into Error one day, the so-called "Destroyer of Progress".
Because Ink is always having dreams about other universes with Error being his archenemy, the artist decides to follow said businessman out of curiosity, only to realize that he and other "outcodes" are experiencing similar dreams that seem to be connected with one another.
So now what? Ink working together with the short-tempered Destroyer to solve this mystery sounds like a dangerous idea, right? Especially if you consider Error's relation to Nightmare's gang, the infamous mafia group which is causing restlessness in Ebott City right now...Series
- Part 1 of ÆTHERVERSE (Steampunk UTMV)
-
The Tales of Kháos: A Reapertale Re-Take by Palito266
Fandoms: Undertale (Video Game), UTMV
06 Oct 2025
Tags
Summary
A sequel to the previous three stories: "Tales of Infinity," "Tales of Pragmatism and Fabulism," and "Zero Tales."
Follow the gods: a brand new species that had been given consciousness by a mysterious form and a body as well. Explore how these deities accustom not only to their existence but also to the world around them that they must protect.Reapertale was created and is owned by Renrink. Inktale was created and is owned by Comyet. Dreamtale was created and is owned by Jokublogs. Errortale and Fresh Sans were created and are owned by Crayon Queen.
(English is not my main language, so there may be some grammar issues.)
Series
- Part 4 of Markings of the Cosmos
-
Tags
Summary
So, I heard you like skeletons...
Reader insert prompt fills for @skeletonh0e's sans-centric Kinktober challenge on tumblr
-
Tags
Summary
A mix of fluff, angst, and crack! Universe and genre used will be in each chapter's author note, along with chapter specific warnings.
-
Tags
Summary
Kamari333's Kinktober shorts, following the prompts set along HERE.
Another year of Kamari333 doing their best to celebrate Kinkplay and the fun of erotica <3
Individual tags in the chapter summaries and notes.
Functional Table of Contents (with tags and warnings) included!
Series
- Part 9 of Kamari333 Kinktober Archive
-
Tags
Summary
Red wanted a drink, not a human. All he needed was one damn night away from Sans' smug comments, Edge's lectures, and the constant chaos of trying to fix the machine that yanked half a dozen alternate versions of himself and his brother into one reality. Instead, he found you- jaded, mouthy, and entirely too good at pushing his buttons.
-
Tags
Summary
Here we are again! Another series of Undertale one-shots following the Fictober prompts and featuring the skeleton brothers as love interests to either my nameless or named girlies.
Just like the past two years, if you'd like any of these to be turned into fics, then please let me know in the comments! If enough people show they're interested, then it'll be added to my list of future fanfics! Five requests are what's needed for them to be added.
And if you choose to wait till the end of the month to read, that's okay! Requests can be made up until November 7th, when I post the list of the lucky winners!
Hope you all enjoy!
Series
- Part 3 of Fictober
-
Tags
Summary
Another year another Inktober. Here's my contribution.
All set in the same AU unless stated otherwise.Series
- Part 2 of Inktober
-
Tags
Summary
Exactly what it sounds like; Flufftober 2025 with UTMV, except there's a different ship (almost) every chapter. Every chapter is in a different universe--except when they aren't. I don't know what else to say. Expect OOC-ness and fluffiness.
Also, I apologize, half of these ships do include Nightmare. I have a favorite.
-
Tags
Summary
As a person, falling in love wasn't on the top of your priority list. If it happened, it happened, but you weren't all too bitter if it didn't. Maybe whatever social higher power wasn't too happy about that, so it just had to partner you up with some nerdy idiot who flew too close to the sun and ripped a self-shaped hole in the middle of reality itself.
And then you also fell in love with his brother. Too bad that you aren't too up for polygamy.
Inspired by Milk Tea and Souls by Lady_Flame96 and Soulfound by yeo_sin, Title inspired by Baile Involvidable by Bad Bunny
-
Tags
Summary
Red and Edge free from the underground just to find that 5 different undergrounds have already been living peacefully just to be thrown into a placement with OTHER SKELETONS??
"dis is bullshit!!" Red yells kicking dirt
"SHUT UP" Edge says looking in the sky then at a large mansion
or
Author really likes underfell and wanted a story focusing on them and found family... that is also just alternate version of them uh... anyway enjoy!!
-
Tags
Summary
Nightmare didn’t pay Killer to be nosy, but then again Nightmare didn’t pay Killer at all.
Besides, Killer never really knew when to quit. After a nasty fight with Cross, Killer gets lost in his frustrations and ends up in a part of Nightmare’s castle he’s never been to before.
The deeper he goes the colder it gets, and the darker it gets. The light he finds at the end of this tunnel seems more like someone's prison than a way out.