underfell
26 stories
UF!Sans X Reader (Finished) by _The_Creator_
_The_Creator_
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Unlike other stories, monsters and humans have already joined. Nothing was ever easy for you AT ALL. Your mom died when you were 6, and ever since then, your dad was.... different. Your a 17 year old girl, and you ran away when you were 15. You decided you couldn't take the pain. Hope you enjoy my story, and sorry if I misspell some words. Autocorrect never works correctly.
Power to Heal (Underfell!Sans X Reader) by Fruityyloopz
Fruityyloopz
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    Parts 41
You wanted to help but it was too late... So, you left. Tears filled your eyes as you thought of the one person that needed you the most... They were gone and it's your fault. You ran and ran trying to escape reality. You thought if you could run far enough or fast enough that you wouldn't have just lost everything that made you want to live and exist... but you did. [CoverArt: By Me <3] [I own none of the artwork within the chapters.] [Spin off of the game Undertale brought to you all awesome people who love Undertale by Toby Foxx]
Not All Monsters are Bad (UF! Sans x Experimented! Reader) by FandomFreak490
FandomFreak490
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    Parts 26
You've been experimented by your own brother to see what could happen if he tried a monster DNA in a human, No one wants to get experimented by him so you decided you'll be his test subject but it went terribly wrong......
Yikes! 【underfell Sans x Reader】|Undertale AU| by attackonteetans
attackonteetans
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u n d e r f e l l You were searching for your brother Frisk. He was obsessed with monsters, he always talked about being their friend. You never understood. He talked about Mt Ebott and how he wanted to climb up it. You had a sneaky feeling he had gone there. You packed your bags, heading out of town to only find the mountains core. A hole. You jump down... Was this the right thing to do?
I hate to love you ~Underfell!Sans x Reader~ by UndertaleTrash003
UndertaleTrash003
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Prepare for crappy writing skills-
【Angel of Blood】Underfell!Sans X Reader by BapBeep
BapBeep
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    Parts 51
Description: Once a long time ago, the multiverses were doing what they would normally do and were getting along just fine. Suddenly, it changed. Y/N L/N fell along with their parents into the Underground. In this world, it's LOVE or love.
Why Did You Do This? (Yandere!Underfell Sans/Edge X Reader) by AuthorBlitz-Chan
AuthorBlitz-Chan
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Basically dis is exactly what the title says it is xD I am ze magnificent Author-cha- I MEAN SANS!! Enjoy~ :3 ♡
Underfell by MissMarissaaa
MissMarissaaa
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...I'm Undertale trash. This is basically going to be the story of Undertale retold as the Underfell version. I'm sure something like this exists already...but whatever. The story is told from Frisk's point of view, and it's the Pacifist version because Genocide scares me. Anyways I hope you like it!
I'm not alone... (Underfell Sans X Reader) by saaaaaaaaaans
saaaaaaaaaans
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You fall down into the Underground, thinking your life was helpless. Now....you realize your life is helpless without him....