Underfellau Stories

In a secluded part of the underground a tower exists sounded by a giant stone maze sounded by cavern walls in this space those that live in it consider it a direct world...

where underfell meets undertale and undertale knows about the au's and undertale gaster is out of the void and will uf sans forgive there gaster for on what he did? Will...

When a young boy named Frisk falls into the underground, accompanied only by his strange new friend Flowey the Flower, he must try everything to get both of them to safe...

This is a story about u and underfell!sans. A little edgy mayb

Red had always been by Sans' side. Classic's side. It didn't matter when the story changed or stayed the same, Red would always be there for him. He stayed when Undertal...

this took too long :(

Adrienne had been staying with the Gaster brothers long enough to learn about the business they were in, and she'd grown used to it. Just when she thought she knew every...

This is a story about 3 girls and their encounter with unfamiliar faces that happen to be S-k-e-l-e-t-o-n-s and this takes place in the 1920s, So sit back, read and sin...

Haro~ This is my first fanfic and story so please enjoy! "Kindness is all we can give, and sometimes kindess is enough..." PLS. READ THE ORIGINAL FLOWERFELL ST...

I have know idea what i just wrote, but i hope you would like it.❤

The legend says that love happens in an instant, and the binds between souls is stronger than anything. But what if your soulmate, wasn't who they should be? What if you...

Using my oc and many other charecters, i made a story about- .... i du

Asgore dies Papyrus becomes the new king Who is he gonna choose as his queen? ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ A series of one-shots, telling how Sans became Papyrus's...

How Papyrus and Sans deals with Sans running away. Maybe their lives will intertwine again. This is an alternate version to the AO3 story 'April Fools'. In the orginal...

(Note: installment in the A Knocking at the Door series, if you are unfamiliar with this then I would suggest you read it first!) This is the one shot collection of ran...

(DISCONTINUED) I have no Idea what to call this. Call It whatever you want. It's an Underfell Sans X Reader. You are in the role of Frisk in the Undertale universe, and...

You were simply taking a relaxing stroll with your little brother... Next thing you know, you're stuck chasing your brother up Ebbot, and manage to fall in... Now what...

In the middle of a reset, Frisk ends up pulling herself into another timeline. It's completely different from the original. She doesn't seem to know why she's there, but...