1 - 20 of 8,724 Works in Sans (Undertale)/Reader
Navigation
Listing Works
-
Tags
Summary
Sans hates and struggles to live. And therapy isn't working
-
Rules to Survive the Zombie Apocalypse by BattleMaiden13
Fandoms: Undertale (Video Game)
01 Jul 2026
Tags
Summary
You have no idea when the world went to shit, but your pretty sure it was either when the dead came back to life and chowing down on anything with a pulse OR it was when you flunked out of college. Either way the world sucks now. You aren't entirely sure how you've survived this long either but your pretty sure it's due to your handy dandy rule book that you always follow to the T. well you follow it most of the time to the T. and everything was going great until you were basically kidnapped by a pair of skeleton monsters. That's went your world went from pretty ok to down right H, E double hockey sticks.
-
souvenirs denues de sens by Marco_enjoyer
Fandoms: Undertale (Video Game), Deltarune (Video Game)
01 Jul 2026
Tags
Summary
A human with the soul type of justice now works at sans' convenience store, after working there for awhile they notice strange things start to occur, like encountering multiple different people who look eerily similar to their boss.
- Language:
- English
- Words:
- 1,789
- Chapters:
- 1/1
- Kudos:
- 4
- Hits:
- 26
-
Tags
Summary
Shortly after you close up the library and make way to your office, the door slams open, the bell chimes clang with the force of the impact, and in arrives a rugged, baleful monster carrying a careless attitude and an offer far too tempting to not have strings attached to it.
-
Tags
Summary
what happens when you can no longer see the world in black in white?
After leaving the house due to an accidental pregnancy, you plan to start over, new a fresh for you and your baby, but something change once your baby daddy shows up and wants to be in your daughters life.
But their limited perception of over you and vice-versa leave all parties unable to see that everyone has multiple layers to them.
-
Tags
Summary
It all started with a housewarming party where only you showed up. Now, you're tangled up with multiple skeletons and a woman that hates your guts for no reason. As much as you want to act like you don't care, you really do, so what do you do now?
It's not like you can survive on your own.
-
Tags
Summary
I’ve always been fascinated by the sea. The mysterious, deadly waves that hold wonders beyond our comprehension. It is one of the reasons I went into my chosen career path, deep-sea fishing. Which is one of the most dangerous jobs on the planet. Yet, despite this fact I never thought anything would actually happen. I was on a safe ship with a very skilled crew after all.
Nature doesn’t care about such things, as disaster struck. I didn’t expect to live when I fell into those icy depths, yet somehow I managed to. For once it made me glad I was forced into Girl Scouts as a kid. Though those simple survival skills definitely didn’t prepare me for half of the things I would encounter.
*This is a rewrite! I dropped the original for far longer than I intended and decided to just rewrite it. I hope you enjoy!*
-
Tags
Summary
you were 16 when the barrier broke, freeing all the monster. you watched it happen on the news with your parents. you were in awe you've always loved magic and myths and everything of the sort, so when this happened you just new you had to befriend a monster and where better to do that then the monster capital, Ebbot. so as soon as you hit 18 you applied to the psychology course, The only thing is, you're from England which is about 14 hours from ebbot, good thing your parents are supportive and accepting right? wrong. your parents hate monsters and will barely even talk about them, let alone let their youngest daughter live with them. too bad that you're going anyway, will you make it, will you fall down and give up. or will you thrive in your new found life. no one knows but you. but if anything your gonna try.
-
Tags
Summary
You (Doc/Doctor) are from a destroyed universe and now live in the Omega Timeline with your younger sibling Frisk, and now you have to navigate dealing with a certain 90's piece of trash and an unwell child.
-
Tags
Summary
You had finally gotten to a point where you can consider your roommate Sans as a close friend. You're comfortable where you are, going to school for art and working part-time to split rent.
Yet, just as you're getting used to this system, two new skeletons appear in your shared apartment in the middle of the night. Are they going to go against your system and disrupt your life? What exactly will be changing?Series
- Part 6 of Reader Inserts
-
Tags
Summary
You lived a normal life trying to pursue a medical degree to help others, but when you end up in a hospital needing help, a group of skeletons appears, and they are determined to help you. Wait, Skeletons? No, that wasn't right, monsters don't exist.
But they do
For some reason, anytime you try to face the reality of your situation and remember the time before monsters, you suffer from a debilitating headache. Even memories you don't remember living, classes with or about monsters seemed to appear in your memories! Everyone around you swears that monsters have been on the surface for years, and yet, you can hardly remember monsters existing all the years they've been aboveground. You can no longer trust your memories, can you trust these skeletons?
Will you discover the cause of your new memories? And will you discover why the skeletons all seem to be intent on staying by your side?
✌︎■︎♎︎ ⬥︎♓︎●︎●︎ ⍓︎□︎◆︎ ♌︎♏︎ ♋︎♌︎●︎♏︎ ⧫︎□︎ ♒︎♏︎●︎◻︎ ❍︎□︎❒︎♏︎ ⧫︎♒︎♋︎■︎ ⧫︎♒︎♏︎ ⬧︎🙵♏︎●︎♏︎⧫︎□︎■︎⬧︎ ♌︎⍓︎ ⍓︎□︎◆︎❒︎ ⬧︎♓︎♎︎♏︎✍︎
-
Tags
Summary
The idol group Blushing bones is super famous and somehow miraculously you ended up dating one of the idols.
At least it feels miraculous at first, but the longer your with Blue, the more it feels like something is wrong.
Series
- Part 2 of Starstruck
-
Tags
Summary
When the quiet solitude of your new life is disrupted by a gaggle of skeletons moving in next door, you and your sibling find yourselves pulled into their orbit. Healing takes time, but maybe, this chaotic, affectionate family is exactly what your soul has been waiting for.
*Inspiration taken from "Bonely Hearts Club" fangame by owl-bones (http://bonelyheartsclub.tumblr.com)*
-
Tags
Summary
You were kidnapped by the Bad Sanses gang because you apparently "stole" Horror's axe. All hell breaks loose.
arc 1 (1-15): encounter
arc 2 (16-?): after -
my heart. (HT!Sans/Reader) by Calibri_1201
Fandoms: Undertale (Video Game), Horrortale - Fandom
01 Jul 2026
Tags
Summary
A Yandere Horrortale Sans x Reader fanfiction. (College AU.)
---
After monsters rise from the mountain with the help of a worryingly skinny little girl, they adapt and enter society with relative ease. Obviously there are racist bigots, but for the most part, they are welcomed.
Legal issues get sorted, and monsters are officially allowed the same rights to an education as humans. Mars and Jupiter join with their respective courses set out, and both encounter a peculiar human. Jupiter sees a new friend, and Mars sees an angel. After living in a lawless land for so long, Mars' sense of normal is just skewed enough to let him think what he is doing is fair. It's for his datemate after all. He switches his course to yours, and with the encouragement of his brother, gets rid of his obstacles and competition in (mostly) non-violent ways.You are his heart.
---
Sans is named Mars
Papyrus is named Jupiter
Reader is named Protag.--
i absolutely cannot promise regular updates. -
Your Fear Is Tasty (Horror!Sans x Reader) by Cat_0967
Fandoms: Undertale (Video Game), Horrortale - Fandom
01 Jul 2026
Tags
Summary
You fell into the underground and try to get out of here alive but things doesn't go the way you or anyone expected, fortunately you have the greatest guide to help you.
This fanfic is a Horror!sans x reader although I hope I can turn it into a slowburn. (Maybe not, we’ll see :P)
Also I wanted to start this mainly because of a friend's request but also because there's not much of fanfics on horror recently... lol
Enjoy!
-
Bound by night, Born of light by KeyLimeLizard
Fandoms: Undertale (Video Game), Undertale AU - Fandom
01 Jul 2026
Tags
Summary
If you blacked out for a week or two after taking a projectile to the head, you'd probably be confused. Fair enough.
But come on—this? This is just excessive.
Waking up in the middle of an unfamiliar room, head pounding like it’s trying to cave in on itself, would rattle anyone. But it’s not just the room that’s unfamiliar.
Everything is.
No memories. No clues. Nothing.
Except… one thing.
your name.
Y/N. Y/N L/N.
And right now, that name is your only lifeline—something to cling to while you flounder through the wreckage of a life you no longer remember.
Now if only you could recall this elusive husband everyone supposedly insists you have....
-
[ERROR: This_Bed_is_Just_Right.docx NOT FOUND] by TheHenbaneCourt
Fandoms: Undertale (Video Game)
01 Jul 2026
Tags
Summary
[ERROR: DATA CORRUPTED]
[OVERWRITE EXISTING FILE? [Y]/N]
[PLEASE WAIT...]You always knew your past wouldn't stay buried.
In another life, you might have dreamed of living in the peaceful countryside, tending to the fields and nurturing your community. Maybe even find love along the way, if you were lucky.
But some things just aren't meant to be.
Fleeing from an abusive home doesn't leave room for fairy tales. And waking up in an all-too familiar hospital, after years of freedom away from your controlling parents, does not a princess make. Something cruel and hungry is calling out to you at night, when the plains are quiet.
And finally…
One night, you answer.
-
Tags
Summary
I HAVE RETURNEDDDD
I made something.
Do not eat it.
It is poisonous.
NO STAY BACK STOP YOU’LL GET SICKJokes aside please read this
After your father tricks you into meeting with the largest crime syndicate in the city, you’ve unintentionally bound yourself to them. Now trapped with a lot of morally questionable skeletons, you find yourself struggling to find a way out of this mess.
UPDATES ON THE 20th OF EACH MONTH
Title is currently a placeholder, if you have any suggestions just drop them in the comments!
-
Tags
Summary
You couldn't sleep no matter how much you tried. The storm outside certainly did not help, at that point you were just left with your thoughts.
Until a lightning struck your house, somehow not making any damages but causing you to hear multiple screams from the first floor of your newly moved in house.
Do you guys know the kind of fanfictions where Sans AUs get isekaied into the real world ? Yeah ? It's just that.
This is my first fic !! Any constructive criticism is greatly appreciated!!¡! ( ´∀` )b
