Underfell Stories

You're a human that has fallen into Mt. Ebott on the year where all humans dress as monsters...Halloween. So how will the monsters know if you're a human or not?

Somehow...I've become a sans...and not just any sans.. I'm classic!? What the flip is going on!? Wait why are different sans and papyrus's showing up at my home? I didn'...

Y/N's been traded and sold her entire life. She's learned firsthand that if you don't obey your master, you get hurt. If you force yourself to listen, you live another d...

"How rude, not even gonna ask for a name??" He teased. "Why are you here?" You glowered, raising the whisk. The skeleton scoffed: "Well, glad yo...

Y/n was half human and half bird. She had a dark tone of s/c due to her 'disease'. Raven wings was a part of this 'disease', along with interesting eye colors. This caus...

What if someone from our world was transported into momma Cq as nightmare? What if a bit later after being nightmare for a while, he finds the momma Cq version of nughtm...

There is not a enough Fellcest books!!!!!!!!!

[Undertale Au's x F!Reader] Can be found in my Quotev Account --> @.FanboilingTrash | AO3 --> @.FanboilingWriter | Tumblr --> @.bdudette When Blueberry and Str...

Y/n was and/or is a very sweet child, unfortunately for them they weren't treated very well by their mother or father, Y/n was abused and didn't have anyone. Fortunately...

Underfell Papyrus is viewed as one of the most ruthless monsters in the underground but what is really under that tough persona? Thanks to Tamqul on Deviantart for letti...

y/n y/l/n is one of the people who has access to the magic in their SOUL. so she's working where everyone with magic that wants a legal job works, plus it pays real good...

Sans and Papyrus were your best friends until randomly they just cut off all contact with you. This went for everyone else in your life so it didn't really hurt that muc...

I somehow become killer sans!? (Different everything, different beginnings, different personalities, different multiverse, multiverses etc

What if someone from our world became papyrus from underfell? Well certainly things won't be staying the same of course. (Differen thing happening including personaliti...

Ok this is my first X reader so it might be tear-able *rips a piece of paper*

It has been 10 years since the monster broke free from the barrier, and since then monsters and humans live together in peace. But for some reason, monsters have somehow...

What if someone became papyrus from underswap? What if they gave their brother more freedom? What if they were the one that error kidnapped instead of sans? (Things wil...

Nightmare found a young child a long time ago. When they fell into a coma it sent him over the edge. several hundred years later the child wakes up in a castle of darkne...

The universe can be seen as vast.....Watch how the school that bullies a poor boy is seen to watch him in different universes Yes this is the same multiverse story from...

If you can't tell what this is from the title idk what to tell you... I will do requests and they can be as detailed or as vague as you want. I will do OCs if you want. ...