Undertalefanfic Stories

Want to talk about falling into the wrong place at the wrong time? Y/N definitely scored big time on that one. One moment she's falling, the next she finds herself trapp...

It's only been a few years since monsters have been released from their underground prison. In some towns, monsters are welcomed with open arms. Others? Not so much. Y/N...

This is a story before the last human fell around the time Chara was still alive and well. Humans were not being hunted till the adopted prince's passing, however with a...

Y/N, meets a new coworker that changes her life forever. A monster, doing his best to make a living after moving out of the underground. Sans is this ecstatic, cheerful...

Au Sanses x Reader If you like edgy and scary Sanses, and romantic and fluffy and edgy scenarios, then this is the book for you!!

"Psychotic tendencies..." As a child, Y/n L/n had a good life. She was always complimented for her h/c hair and e/c eyes. She had a loving little sister and a...

It's been a few years since Y/N started her family. Without Honey, she made due with what she had; that being the cafe, her brother-in-law Blue, and her two twin sons. O...

-FIRST BOOK OF THREE- Ever since the War, magic humans have been training to kill all monsters when they escape. They've even built a special school designed for teachin...

[In Editing] I hope you'll like this Undertale AU Fanfic I made. This is a Fanfic story about Vampire Sans sinse I didn't see any story of him. And I thought that I sho...

(Y/n)(L/n). A girl who received an unknown email telling her to download the link of a "game". She didn't know what could happen.. Except maybe a broken laptop...

You were always a curious child. One day, your curiosity took you too far. You lived not to far from a mountain, MT. Ebott, and always wanted to see what was on the top...

Innocence had already been more or lost by the Dreemurr brothers, but the friends and memories they'll make along the way are certainly worth it. The question is: will t...

Y/N was a normal teenager who gets bullied everyday, she has only one friend who called 'Frisk' one day they decide to climb the mountain but then... "I want you to...

When Weiss Schnee Gets Hit by Cinder Falls Fall Maiden power she falls into the abyys and ends up in the anti void instead of The Ever After where she meets Error!San's...

The perfect Mx. Y/N always had a crush on that mysterious quite loser, Chara, but for them? They didn'r care about Y/N, they disliked them ... But what if one day, we fi...

Nightmares gang were at his mansion chilling out when they hear three loud bangs at the door, they opened the door to find the star sans', lead by Ink, in floods of tear...

"Are... Are you going to come back?" I ask the black gooey skeleton. I bite my lip as I hold back my tears from falling. I grasp into the end of my gloves tigh...

Hello! Here is a fanfic that I will write for you people who wanted this but couldn't find any.

This is the first fanfic I've ever written so plz don't judge. Reader-Chan is a female BTW but guys can read too. I hope u enjoy it! ^-^ COVER IS NOT MINE

A story about (y/n) on a mission to explore the underground and find the mysteriously disappeared children. (All of the gorgeous artworks seen in this story belong to th...