Underfell Stories

1.2K Stories

|| Catching Feelings || AU Sanses x Reader! || by sydneysayshello
|| Catching Feelings || AU Sanses...by im going to cough on you
You kind of zoned out for a bit, trying to piece together what they said, when the door opened suddenly. You let out a small shriek as your head slipped and you hit the...
Can I take you to Dinner? Mafi-fell!Sans x Reader.  [COMPLETED] by MissHoll-E-Socks
Can I take you to Dinner? Mafi-fel...by MissHoll-E-Socks
"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...
You and Your Bitty Pals by Blueprint15778
You and Your Bitty Palsby Blueprint15778
It has been 5 years since monster broke free from the barrier, since then monsters, and humans live together in peace. But for some reason monsters have some how go a mi...
(Underfell sans x reader (female)) UNDERCOVER by moon1767
(Underfell sans x reader (female))...by Arie
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?
Fallen Angel ~Undertale multiverse Vs Reader~ by S1MP-NonBinary
Fallen Angel ~Undertale multiverse...by RienTheSimp
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...
Becoming papyrus from underswap  by KarmaAkabane425
Becoming papyrus from underswap by Karma Akabane
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...
Reborn as fellswap san and now I'm kinda blind!? by KarmaAkabane425
Reborn as fellswap san and now I'm...by Karma Akabane
What if..someone from our world was reborn as fellswap sans? But an accident when he was young leads to becoming blind for a long time and papyrus feels guilty about not...
Not Just Evil (Underfell Papyrus X Reader) by TheIndianaCrew
Not Just Evil (Underfell Papyrus X...by Indiana
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...
Black Roses (Overprotective!Bad Guy Sans' x Child!Reader) by JulesRedenger
Black Roses (Overprotective!Bad Gu...by JulesRedenger
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...
I'll die smiling.....  by Blinkz_Terror
I'll die smiling..... by Blinkz
This is an Underfell fanfic about Sans doing some sly stuff..That ends up hurting Papyrus in more ways than one!
Castle's Pet (Bad Guys X Reader) by EmelinStriker
Castle's Pet (Bad Guys X Reader)by Emelin
[Highest Rank: #1 in "sans"] [Second Highest Rank: #18 in "xreader"] (Girls only!) (Earlier updates are on my Quotev account!) WARNING: Profanity a...
I am not cute (UF! Bitty Sans x reader) by crazywildernes
I am not cute (UF! Bitty Sans x re...by Crazy Wild
This will be my first book so please no hate. I am trying to make the book for both genders so if I wrote something for a specific gender please tell me. If you dont lik...
A Three Way SWAP by JimmySMASH4daWIN
A Three Way SWAPby Jimmy SMASH
Papyrus finds himself curious about the machine Sans has behind their house. When he accidentally activates it, he ends up sending himself to the world of Underfell. Mea...
My Two Masters (UF!Papyrus x Skeleton!Reader) by OreoDaSkeleton
My Two Masters (UF!Papyrus x Skele...by ~Oreo / Oreyna~
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...
Sweetheart(Underfell Sans X Blind!Fem!Reader/Discontinued) by ausans8080
Sweetheart(Underfell Sans X Blind...by Elkoi
Your a blind human girl who fell into the underground. After passing through the ruins, you met a edgy skeleton...
Hero With A Leo Sign (Au Sans x Reader) by Erinadahara
Hero With A Leo Sign (Au Sans x Re...by Erina_Strange
Hello everyone. This is my account in Quotev: https://www.quotev.com/Fearlesswoman I hope you enjoy
Reincarnated as Underfell Sans but different? (REWRITE) by _Dist0rtedVisi0n_
Reincarnated as Underfell Sans but...by ✦••𝐒𝐥𝐞𝐞𝐩𝐲••✦
This is the rewrite, the old book is still out for readers to read for reasons I do not know of.
Kustard Soul Mates (in writing process) by Yuki_TheDarkWolf
Kustard Soul Mates (in writing pro...by Yuki_TheDarkWolf
sOoo I've had this idea where they have soul mates. Like everyone is born with a half heart necklace. Every time the person gets near their soul mate it will heat up as...
Lost yet Found (an undertale Au story)  by itsjustellii
Lost yet Found (an undertale Au st...by Elli Leather
Hi there, if by any chance you've happened to stumble across this book, this is me, creating a storyline for my own au which I'll be mixing up with some other familiar o...
Undertale: giving soul by Author-Dayo
Undertale: giving soulby Author-Dayo
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...