Undertale Stories

Reborn as the guardian of positivity, you find yourself in a strange new world, uncertain of what it may hold. Navigating it isn't easy with gods like Nightmare and Error trying to strike you down every step of the way. But unlike the previous Dream, you have nothing to lose, and are determined to forge a better path than the soul whom you have replaced. Cover art by the wonderful @Nymara379 on A03 ♡

so I oh ways want to make a reborn as killer sans, but we're mentally unstable, of course, due to the rest and our past memories, which we can't remember what we were anyway! We know everything and everyone, so why not mess with them. This going to me fun!!!

One day, Y/N was playing Undertale. Y/N finished the game, both genocide and pacifist. After the second pacifist ending, you wondered how life would be like IF the monsters actually were real. If the monsters would actually roam around and act as humans. That thought soon changed. ( Book Cover Picture is NOT Mine. I found it on google. Credits to the owner. )

In this AU, Undertale monsters live amongst humans in the One Punch Man verse. How will it all play out? (THIS IS DIFFERENT THAN PUNCHTALE!!!) As an AU, characters may differ from their canon counterparts.

Being reincarnated is a lot but something one could get used to. Waking up in a weird body with strange creatures staring at you was startling to put it lightly. She was just going to leave these weird 'people' and try and understand things.. Wait...why was she so tiny?! -- OC as babybones Ink from a Shattered Stars multiverse. The usual story will certainly be different then usual with the script kicked far to the side. ---- Inspired by 'A Psychopath by Clichey'

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)

Sans and the gang escape the underground but the world outside doesn't accept them. They have to disguise themselves. Inspired by the glamours In A Wolf Amongst Us. Multiple Relationships, drama, romance, angst, despair, adventure and craziness ensues.

It all started with the sound of a knock, And evolved into a joke, The jokes continued until they became friends, And the friendship turned to a relationship, But soon life came into play, The king came along, Thinking he could sweep the love away.

Born into a world that decided his fate before he even took his first breath, Ryomen Y/N was never given a chance to be human. Feared by his own mother. Hated by his village. Rejected by humanity itself. They called him a curse. So he became one. With nothing left but silence and resentment, Y/N abandons the human world and falls into the Underground-a place filled with monsters who fear the surface just as much as he despises it. But the Underground is not what he expected. Monsters do not see him as human. They see him as something far worse. And within the depths of this strange world, he meets a wandering ghost named -a soul bound to the past, carrying hatred and emptiness similar to his own. At first, they are nothing alike but conflict and silence. Yet as their paths continue to intertwine, something begins to shift. Two broken souls. Two histories of rejection. Two beings the world tried to erase. And in a place where mercy and determination decide fate itself, Y/N must confront a terrifying truth: Maybe the real monsters... were never in the Underground.

Working at a luxury hotel has its advantages- the pay, discounts, seeing celebrities. It's not all sunshine and rainbows, but you enjoy it! As someone who overanalyzes things and processes things different then most normal people, you find the mind numbness of the job very relaxing. Not too exciting, not too boring, just nice and simple. Unfortunately, you're really good at your job. And that causes you to accidentally overhear some intel- causing you to be kidnapped and sold at auction. What happens when a perfectly composed and professional monster loses his rational thinking in her presence? What happens when they come together to stop forces beyond their control- beyond their power? _________ Art doesn't belong to me.

TW: Swearing and slight gore Y/N reincarnates in the anti-void as a Voice... Will he befriend error or will they make them hate their guts? And will they meet other people? Only time will tell. Hello, this is going to be my first book and idk if it's going to be good so meh :v This story was inspired by transported as a voice by Virus_bOi, I obviously do not own undertale and I don't keep up that much with the fandom, so some personalities might be different, but hey. I can just say that it's a different multiverse ¦ ] The cover image is from Shira Wolfiecute on tumblr

The word RUN still echoes long after the sound should have died. Not in his ears- in his bones. Each step forward drags two shadows behind him. One remembers her laughter. The other remembers her teeth. Sometimes she's there in reflections: whole, breathing, eyes soft with recognition. Other times the glass crawls with that thing-limbs bent wrong, smile too wide, voice layered over itself like a broken chorus. He doesn't know which version hurts more. The balance demands sacrifice. The world demands forgetting. But grief is heavier than any law, and hope- hope is a stubborn parasite. "If you can hear me," he whispers into the dark, into the places where light goes to die, "I'm still looking." And somewhere, between the shifts, between the screams and the silence, something hears him. Something remembers being her.

These four walls are the only sight he's ever known. There is nowhere to escape the prying eyes that watch his every move day after day. Surly, there has to be something better beyond this gilded cage? Started 2/25/25 Finished

???: 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.)

A new hope has awakened in the world of RWBY Y/n a normal boy is Isekai'd into the fictional world of RWBY and is determined to rewrite fate, How will he change the story I got no clue, how bout you? All RWBY characters are owned by rooster teeth And all other characters are owned by their respective owner's [Slightly Slow Uploads]

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!

My other art books are full, so here's a new one! The third! I wanna share my tumblr art with you guys <3 I add 3 new chapters at a time. Not everyday updates, just whenever. ENJOY!!!

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)

4 years after monsters came about Ebbot (Y/N) was friends with the Dreemurr children. Being the master dancer that she is can gather her magic to do amazing things. Having been through a lot in the short 19 years of life. She finally meets a handsome monster who knows her big brother and who understands what she goes through. What will happen between these two?

Moray, beloved member of the Feisty Five, gets ill without reason and ends up ultimately falling down. Ceroba, dear friend of the posse's leader, gives them a PSA from the Royal Lab, who could find a way to save them. But what is about to unfold is a lot more ghastly than what they could ever imagine.