Undertail Stories

You've lived your life without ever knowing your parents. Despite that you dream big because you don't have much; aiming to become a famous singer and prove anyone who h...

Sans decides to use a special fertilizer for his tomatoes...

It's been a while since Horror's world could be considered even remotely kind. But a newcomer drops in, and reminds him that there's still sweetness to be found in life...

Not for kids lmao

Howdy, this is a flowey X reader thing, I'll try to post often.

Nightmare, The King of Negativity, known for being cruel and torturing people. But oddly enough he feels lonely, I mean it must be hard when his only friend Error is alw...

" why dont you just take a swan dive off a building and hope that in your next life you get a quirk " was the greatest advice given to the quirkless boy izuku...

This is a undertail animal au but also normal undertail in this Frisk is part cat and Chara is part werewolf. Frisk got everyone out of the underground while looking for...

A contest between friends I'm sorry you had to witness this horrible story.

Just a drabble :P This story will include 18+ content, if you're comfortable reading that then move along, but if you are younger than thirteen and still have not had...

It's your first day and you had a black eye because of you dad. You where nerves for school because you where going to Underhigh. And you love sciance but what if that a...

Yep, art not by me by the way, there will be inappropriate references in here

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

this is full of omotale stories I write please excuse my Shity spelling and grammar this is NSFW I do take requests some fontcest

Plz give me suggestions of what to do next and if I don't upload for a while it's because I have important things like school homework and I'm probably thinking about wh...

Frisk always had a crush on Sans ever since they had left the underground. After she turned eighteen, she fantasized him of fucking her.

As requested by my readers. This book contains explicit content. Stories that follow with your deepest fantasies about the characters of undertale. I take suggestions dr...

You aren't supposed to be alive. You fell into the bowels of Mount Ebbot - you were supposed to have died, right? It doesn't matter, anyway. Someone very frightening is...

This is like my other one shot story except with lemons/smut/sin/sex or whatever else you want to call it. It might/will include boy x boy, girl x girl, boy x girl, and...

A skeleton named Sans falls in love with the only thing that makes him happy, that made him feel complete... his brother Papyrus. But when sans suspects papyrus of falli...