Sans Stories

There's only one rule for those capable of AU hopping: never bring a real person into the Undertale multiverse. But, like all rules, it was destined to be broken. | - Error Sans x Female Reader - Young Error - take places not long after he becomes Error - so he mimics his canon version more closely at the start before molding into my fanon version with experience - This intentionally doesn't follow the exact plot of Aftertale either - Achingly slow burn - I abuse Y/n more than necessary (oops) and Error is toxic pre-character development. This isn't meant to portray a perfectly healthy relationship, but show that perhaps even the worst person can change - The friendship dynamic is: bffs that insult each other for fun (while not meaning a word of it) & I include a lot of what's deemed 'filler' content b/w Y/n & Error (y'all just 'hanging out') bc there has to be a solid foundation for Error of all people to care about someone else - Expect a heaping helping of banter 👍 (I couldn't help myself)

Your favorite skeleton is back at it again... and again... agagaagaag Sans has had enough. Everyone is at the surface, holding their own jobs and lives. But... Sans can't ever let it fade from his mind. The dust. The cries. Watching the screen with Alphys as a child just rampaged in the underground. He is going to snap. He is mad. He is sad. He can never forget. Cover is NOT mine, find it online if you want ::Rights for the original concept and media 'Undertale' are all under the jurisdiction of Toby Fox. All other workings are done by me.::

Sans grows tired of Frisk's resets, and he grows tired of knowing everything, after over 100 resets, Sans feels something, deep inside him, could it be hidden potential? or just the resets driving him to insanity!

Have you ever thought about what it would be like to be.. Sans? Be Papyrus' lazy and playful brother? Be a comedian with endless jokes? Be the mysterious judge? Be well-liked? You envy him. You wanted to be him. Yet nothing could've prepared you for what's coming. . . . (WARNING, THIS IS A MIX OF CANON AND FANON FACTS. THERE MIGHT BE THINGS YOU DONT LIKE BUT JUST BE THE BIGGER PERSON AND TOLERATE IT. THIS IS NOT MEANT TO BE TAKEN TOO SERIOUSLY AND IS INTENDED ONLY FOR ENTERTAINMENT.) (Cover made by me. As you can see, I made that thing on IbisPaint. I understood nothing about making book covers and I messed up on the proportion many times so I gave up and that's how the cover came to be. Idk how to shade and make backgrounds/landscapes btw) (Tbh I wished I made this far earlier because it's late 2025, no one is going to read this pile of nonsense. 😭) YOU GUYS HAVE AN OPTION TO CHOOSE THE DIRECTION OF THIS STORY THROUGH FREQUENT POLLS I MADE!!! First thought of and made on 1st Dec 2025 Posted on 6nd Dec 2025 cuz I was feeling confident for that hour. I can proudly say I've been doing this book since last year hahhahahahahahaha (get it cuz I did this thing is Dec 2025 and now is Jan 2026?) I made the cover btw

Please check galaxiu on twitter they the one to design sans

Abandoned on Mt. Ebott at the tender age of five, young Harry's unsurprisingly died, but Death's always had a weird relationship with his variant... Meanwhile, before Flowey's revival as souless talking flower, Sans makes a discovery under the mound of snow, Papyrus has always wanted to be a big brother anyways. *Edited Summary (29/09/2025)

???: I want a fresh start and you seem like the perfect specimen to use for this story, Y/n L/n. (So in short the first story of this still happened but ???(me) Erased the memories of it happening making it all happen again I hope you guys enjoy this story till next time.)

"the healer likes t' sleep. like, a lot." Axe looks at the sole female AND human member of Nightmare's subordinates. She was only ever awake for about 8-10 hours a day, rarely ever 12, it was both fascinating and irritating at the same time. He was damn sure humans would be awake for more hours than that, he even asked Murder at the time if it was normal. Said skeleton didn't give a single care though, his words: "who cares, makes her more tolerable. 'sides she gets her job done." The cracked skeleton just couldn't shake off the feeling that there was more to it than meets the EYE. ━━━PHOTO CREDITS: Whale鯨豚 [@Whale5511] on X! ━━━MOST NOTABLE RANKING: #1 in sansxreader, horrortale, something new and badsanses on 23/12/2025 #1 in undertale on 25/12/2025 #3 in bittersweet on 24/12/2025 #5 in reader on 24/12/2025 #19 in sans on 23/12/2025 ━━━━━━━━━━━━━━━━━━ DATES PUBLISHED: 001 ━━ July 29th of '25 002 ━━ July 30th of '25 003 ━━ August 1 of '25 004 ━━ August 3 of '25 005 ━━ August 6 of '25 006 ━━ August 8 of '25 007 ━━ November 8 of '25 008 ━━ December 22 of '25 009 ━━ December 23 of '25

This isn't a normal Y/N story the bad sanses do a raid on an illegal auction of many rare, dangerous, and illegal things. but after the dust settles, killer finds what he believes to be a weird mutated cat and decides to take it back with him art by me. my first book, and feel free to correct my spelling in the comments Y/n means your name Y/fc means your favourite colour Y/fm means your favourite type of meat Y/hl means hair length Y/hc means hair colour Y/sc means skin colour Y/ec means you're eye colour

the bad sanses do a raid on an illegal auction of many rare, dangerous, and illegal things. but after the dust settles, killer finds what he believes to be a weird mutated cat and decides to take it back with him art by me. my first book, and feel free to correct my spelling in the comments

You are an orphan that was being chased by a dozen Orphanage keepers. You had just witnessed your friend's death and had ran away. You quickly run to Mount Ebbot. And you jump of a cliff into Mountain. You hit the ground and black out. When you wake, you are greeted by a family of monsters and 2 humans. They become your new family. All is well. ... Right? Cover Art: https://wallpapers.com/wallpapers/undertale-frisk-po8zlb7z6u9ucz1g.html

Dreamtale Oneshots that gradually turn into a story by the end! Featuring Dream, Nightmare, Ink, Blueberry and Error! And Bonnie the Bunny (not to be confused with FNaF (even though I inserted him as a FNaF reference (everyone got attached to him))). No ships, though some subtly hinted at such as errormare :> None are made canon! Dreamtale belongs to Jokublog Error belongs to CrayonQueen Ink belongs to Comyet Blueberry belongs to fandom, Underswap belongs to P0pcornPr1nce

A story of a young Ink discovering what it means to be a Protector of Creation, as he finds his place in the Multiverse.

DustDust intends for his final moments to be spent killing the one he oh so hates. Yet fate seems to have different ideas. (My first time writing anything, so don't expect much from this story. Also, this is my own take on the multiverse and DustDust. This DustDust is also inspired by UJD's DustDust) COVER ART ISN'T MINE, CREDIT TO THE ORIGINAL ARTIST. UNDERTALE BELONGS TO TOBY FOX AND THE OTHER AUS BELONG TO THEIR RESPECTIVE CREATORS.

Seven years ago, monsters were finally free. Seven years ago, a human was forced into bondage. Seven years ago, this world ceased to be the tale we all knew and loved. Now, the butterfly flaps its wings. How would this world react to a presence never meant to be in the script? How would it react...to You. After all, you were Not Meant To Be. Author's Note: Welcome to my very first story! Not Meant To Be is an Undertale Reader-Insert/Chara fic, with emphasis on a plot, written purely for fun. It is heavily inspired by other works in the fandom. Rated Teen (T) just to be safe. Might bump to Mature due to (little) explicit language, violence and fantasy violence, and suggestive/sexual themes. I do not own Undertale or its characters. Enjoy!

Underfell is a dark world with the major rule of kill or be killed. Even though children are suppose to be secluded from this rule, that doesn't stop monsters from hurting children. Undyne is a monster who lives in Waterfall. Under the care of Gerson. One day while out on a walk the fish monster stumbles across a baby. Though it wasn't any monster. It was a small little baby skeleton. (the cover is only temporary, until I'm able to make a cover for the story)

After thousands of resets, Chara had grown tired. Tired of the dust floating in the air. Tired of seeing the people they cared about die over and over And over And Over AND OVER AGAIN! ~~~~*ੈ✩‧₊˚༺☆༻*ੈ✩‧₊˚~~~~ After a fierce conflict, they encountered a certain man whom happens to speak in hands. Coming to an agreement that changed the very fabric of the world. Chara found themselves back where Frisk fell, and they waited. They waited and waited until somebody fell; it was expected to be Frisk, the real Frisk. But when Chara got up to take a look at them... they realised... That wasn't Frisk. ~~~~*ੈ✩‧₊˚༺☆༻*ੈ✩‧₊˚~~~~ 𝐓𝐇𝐈𝐒 𝐅𝐀𝐍𝐅𝐈𝐂 𝐈𝐍𝐂𝐋𝐔𝐃𝐄𝐒: - - Start ➤ 8/10/2022 End ➤ n/a

Garou, the Hero Hunter, finds himself trapped in the Underground. It's time to conduct... good?

All characters belong to their respective owners. Unhinged & Nonsense is a world where nothing makes sense. It just occurred to me one day at 2 AM that what if everyone just goes.. unhinged? Like Killer becomes a teacher? Abyss goes to become a delinquent? Mecha becomes a celebrity with unlimited money? Nightmare becomes an octopus? Color becomes obsessed with sea life (I know it's canon). So, welcome to my little imaginary world where my imagination is endless until my motivation runs out. This is pretty much one shots of some glimpses of ideas I get and wonders if I should draw or not. NOTHING IS CANON. THIS IS JUST FOR FUN!!