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...

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!!

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...

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...

Mettaton thinks you look absolutely fabulous~! Come and read this book so he can give you some love darling~!

"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...

You are an orphan, abandoned by your parents at birth. You've lived between countless foster families and a dreaded girl's home for as long as you can remember, because...

A second-person relationship with Asgore Dreemur, former king of the underground. With all the pressure on a sixteen-year-old hiding his sexuality from his family and th...

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...

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

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)(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...

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

"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.

We all know nightmare had eaten the negative apple, because of that he's overwhelmed by negativity making him a monster leaving his brother dream to feel an extreme guil...

Undertale aus x reader Featuring (in order): Nightmare Error Dream Ink Cross Dust Killer Blue Horror The Soulmate Au is where everyone that comes or lives there will hav...

A Goat!FriskXAsriel Fanfiction After the Barrier is destroyed by Asriel, he is doomed to turn back into Flowey once more. Lilac (Frisk) desires otherwise, and gives the...