Underfell Stories

1.2K Stories

Our Pen by R3myR3ad3r
#1
Our Penby R3myR3ad3r
You're the Ink of your multiverse, and you don't even know it. Well, until you meet the Ink of another, along with Error. -NOTES- I made the cover! This obviously isn't...
Never Go Back (Au sanses/Papyrus' x reader) by BrightLadyStarlight
#2
Never Go Back (Au sanses/Papyrus'...by BrightLadyStarlight
You are a doctor in the emergency department living in the city of Mount Ebott. You live with two magical skeleton who defy any type of logic and have a sleeping schedul...
My Life as the Prince's Servant (UF!Asriel x Male Reader) by Ungrateful_Hacker
#3
My Life as the Prince's Servant (U...by Ungrateful_Hacker
After the monsters broke free from the underground they enslaved all of humanity. The monsters took complete control over the world and the world was powerless to stop t...
An Oath of Mercy || UnderFell Sans x Reader by StrawberryMilkSnake
#4
An Oath of Mercy || UnderFell Sans...by Silver
One clumsy moment and a broken leg are all it takes to leave you at the mercy of the very edgy and very hostile monsters of the underground. Thanks to your knowledge as...
Itty Bitty Love by Cookiedoll14
#5
Itty Bitty Loveby Naomi Gonzalez
(Cover Done By Me) Y/N is a very successful woman, who is the top surgeon in her job and has a family loan that is given to her every month. But even with her riches and...
CANINES ;; undertale by BRA1NR0TTED
#6
CANINES ;; undertaleby rot
When a dog is found in the Underground, Sans decided to keep the Mutt as a guard-dog and bait catcher. What happens when universes collide and this dog... isn't even a d...
Undertale: giving soul by Author-Dayo
#7
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...
About Time by _Irrelevant_Author_
#8
About Timeby Irrel
You were always put in second place due to your sister being favored over you. No matter what you did it always seemed that you both were competing against each other. Y...
Ulty: A God's Birth by Ultimateashes
#9
Ulty: A God's Birthby Ulty Dust Sans
Official remake of Ulty: Creation of a monster A story that starts from Dusttale and goes around the AUs, completely transforming our protagonist English is not my nativ...
New Life In The UNDERGROUND Underfell Papyrus X Reader by Naryhey
#10
New Life In The UNDERGROUND Underf...by Nrgs
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...
T O  M A K E  Y O U  M I N E [ON HOLD] by __APATHETIC
#11
T O M A K E Y O U M I N E [ON H...by Underfell Papyrus
Your everyday depressing fellcest- "Who Would Ever Love A Worthless Nuisance Like You, Sans?" The younger skeleton spat, glaring down at his chained brother. T...
My Two Masters (UF!Papyrus x Skeleton!Reader) by OreoDaSkeleton
#12
My Two Masters (UF!Papyrus x Skele...by ~Oreo~
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...
𝙻𝚘𝚟𝚎 𝚊𝚛𝚘𝚞𝚗𝚍 𝚝𝚑𝚎 𝚌𝚘𝚛𝚗𝚎𝚛 𝚜𝚝𝚘𝚛𝚎 by MerryJane8
#13
𝙻𝚘𝚟𝚎 𝚊𝚛𝚘𝚞𝚗𝚍 𝚝𝚑𝚎 𝚌𝚘�...by Bitxhy
(ᴠᴀʀɪᴏᴜs sᴀɴs ᴀɴᴅ ᴘᴀᴘʏʀᴜs ᴀᴜs x ʀᴇᴀᴅᴇʀ) ||ᴀɴᴅ ᴛʜᴇɴ ɪ ɢᴏ ᴀɴᴅ sᴘᴏɪʟ ɪᴛ ᴀʟʟ ʙʏ sᴀʏɪɴɢ sᴏᴍᴇᴛʜɪɴɢ sᴛᴜᴘɪᴅ ʟɪᴋᴇ "ɪ ʟᴏᴠᴇ ʏᴏᴜ."|| Life was merciful enough to grace you...
Underfell Sister Scenarios by EmilySkelewolf
#14
Underfell Sister Scenariosby Lady of WIP
How would your life be as Sans and Papyrus's sister in Underfell?
Completed
AU Sans X Reader One-shots by Little_Blue805
#15
AU Sans X Reader One-shotsby Blue
Completely female readers unless a request asks different. That's...really about it, enjoy!
The Mother Of Dragons「 Sans & Papyrus Au's x Reader 」 by GoneToSleep
#16
The Mother Of Dragons「 Sans & Papy...by Moe
❝ Long Ago, Lived Monsters, Humans, Mages, and Dragons. All living in peace. Until humanity decided that Monsters, and dragons weren't meant to thrive in peace along wit...
Naturetale : reborn as lavender  by KarmaAkabane425
#17
Naturetale : reborn as lavender by Karma Akabane
(As far as I know, no one has made a story about naturetale like this so..and the only reason why I writing one like this is because of fatal error part 5? Or part 4, go...
Black Roses (Overprotective!Bad Guy Sans' x Child!Reader) by JulesRedenger
#18
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...
Completed
Undertale x male reader by RandomKid362
#19
Undertale x male readerby Toad Yeager
So harem book of Charas and Frisks x male reader but real description is below this. The only one of his person in all universes is part of Undertale with an OP powers b...
The One Thing That They Care About (Sans AU x Reader x Papyrus AU) by TheiChronos
#20
The One Thing That They Care About...by 𝐜𝐡𝐫𝐨𝐧𝐨𝐬, 𝐭. 𝐯.
Y/n L/n. A special human with a special SOUL. Yes, her Soul Trait is something new. But other than her SOUL trait she has another secret. One day, while she was at the...
Completed