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Here we are again! Another series of Undertale one-shots following the Fictober prompts and featuring the skeleton brothers as love interests to either my nameless or named girlies.
Just like the past two years, if you'd like any of these to be turned into fics, then please let me know in the comments! If enough people show they're interested, then it'll be added to my list of future fanfics! Five requests are what's needed for them to be added.
And if you choose to wait till the end of the month to read, that's okay! Requests can be made up until November 7th, when I post the list of the lucky winners!
Hope you all enjoy!
Series
- Part 3 of Fictober
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Where Do Monster Souls Go When They Die? by Just_AliAnne261
Fandoms: Undertale (Video Game)
01 Nov 2025
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"Papyrus felt... strange. Softer. Lighter than ever before.
He could've sworn he was just in his bedroom a minute ago. He remembered his old, cold bones curled up under the sheets, his soul crying out with deep, painful loneliness. He's pretty sure he just fell asleep in that bed with tears running down his face.
He's never been the same since Sans passed away two years ago.
But now he's on a fluffy white cloud, high in the sky. At least, that's where he thinks he is."
Series
- Part 12 of Skeletwins Side Stories
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Snowdin Adventures with the Skeletwins by Just_AliAnne261
Fandoms: Undertale (Video Game)
01 Nov 2025
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"You want to know what to do here in Snowdin? Grillby's has food, and the library has information... If you're tired, you can take a nap at the inn. It's right next door - my sister owns it.
"And if you're bored, you can sit outside and watch those wacky skeletons do their thing. There's two of them... Brothers, I think. They just showed up one day and... asserted themselves. The town has gotten a lot more interesting since then."
The daily lives of wacky skeleton brothers Sans and Papyrus. Watch and read as they get into all sorts of wacky adventures, cause mayhem, and learn life lessons along the way!
Series
- Part 1 of Skeletwins
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The thing about soulmates is, no matter what pries them apart, they always...always find a way back together
Chapters 1-3: Prologue
Chapters 4+: Main Story
*This is a rewrite of I Have The Power of Gaster AND Anime On My Side. Same concept, with a bit of a serious feel.*
**Please be aware that this is not like my usual reader-inserts!! This story is in 3rd person pov, very vague description of a female reader. Unnamed (Pet names only). No use of y/n, y/e/c etc.**
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Cross finds himself responsible for the death of his universe. After years in the white unending void, his tears summon Nightmare, who brings him back to the Castle.
It’s the aftermath of a more brutal XTale au, where Cross deals with PTSD and OCD, while trying to make a place for himself in the gang. It’s difficult, when you make mistakes left and right.
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The butcher (Short oneshot) by Kitteninasuit
Fandoms: Undertale (Video Game), Horrortale - Fandom
01 Nov 2025
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The short story of horrortale sans AKA the underground’s butcher- reluctantly dragging himself to kill the next fallen human who managed to befriend both him and his brother.
- Language:
- English
- Words:
- 767
- Chapters:
- 1/1
- Hits:
- 3
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Summary
(Y/N) doesn’t remember much. Not since they awoke midway up Mt. Ebbott, having mysteriously collapsed onto the grassy terrain.
Thankfully a tall skeleton passing by spotted them and vowed to helped them recover, as far fetched and impossible as it seemed. After all….
Monsters didn’t exist…
Did they?(A classic undertale Sans and Papyrus AU x reader fic with a Twist ;P)
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Years after monster and human society merge, a young monster returns to the Underground with the intention of finding a story to tell. She finds that story in a stack of well loved letters between one Cathode and Mailman.
NOTICE: The final arc of this story contains implied suicidal ideation and serious self-destructive behaviors. If you are not in a position to read this sort of thing, you can stop reading after Chapter 22 and skip from there straight to the epilogue!
Series
- Part 1 of Dear Mailman: Yours, Cathode
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Seasons Don't Fear The Reaper (Nor Do The Wind, The Sun Or The Rain) by Uncreative_City
Fandoms: Undertale (Video Game)
31 Oct 2025
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Lotus and their partners engaging in some seasonal activities that definitely don't involve going into the haunted woods.
- Language:
- English
- Words:
- 778
- Chapters:
- 1/1
- Hits:
- 11
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Mamamangoverse Memes and Incorrect Quotes by Mamamango123
Fandoms: Hazbin Hotel (Cartoon), Murder Drones (Web Series), Five Nights at Freddy's, Deltarune (Video Game)
31 Oct 2025
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Summary
So yeah, I just thought of these and thought it'd be funny
Series
- Part 11 of The Mamamango verse
- Language:
- English
- Words:
- 631
- Chapters:
- 2/?
- Hits:
- 40
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KillerVlogs uploaded a new video!
Tape #00: Calling Creepy Numbers
"A company? A friend? Simply someone to talk to. I've been... lonely as of late." The line went silent for a moment and before Killer could answer, the voice asked. "Are you perhaps... interested?"
KillerVlogs is currently live!
Now Streaming: Help Me
"How long are you going to keep me here?"
The camera positioned on uneven surface. A broken leg propped on one of the small chairs and beyond that, an easel was positioned along with a canvas effectively blocking the figure currently painting the holder of the device. The soft light of the morning from the windows betrayed the air of discomfort. The comments of the live stream pour like heavy rain.
'GET OUT!'
'RUN!'
'Is this true, like no ARG shit? Somebody call the cops!'
The figure behind the canvas paused from dabbing the brush delicately on the image. Killer just know that his host was sporting a sweet smile as he said:
"As long as it takes."
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Life is monotonous and dull, but it’s okay. You’re fine.
Assignment after assignment, test after test, meaningless conversation after meaningless conversation. It fills the void like a flitting firefly in the smoggy night sky, a brief flash of light— followed by an endless expanse of nothingness.
That’s okay. You’ve grown accustomed to it like a goldfish stuck in a glass bowl. You swim, back and forth, over and over and over again until you can’t anymore. It keeps you occupied, distracts you from your lonely, miserable existence.
Until you meet someone who simultaneously fills the void, and drags you so much deeper into it.
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Underfell Sans x ReaderA story about the woes of young adulthood. Includes themes of abusive relationships, inappropriate age gaps, mental illness, and substance abuse.
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Redemption and Revolution by thevideogameempire
Fandoms: Undertale (Video Game), Undertale Yellow
31 Oct 2025
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It’s done, after all these years, monster kind can finally be free of their prison in the underground. But not all is well. A specter from the past haunts Frisk, and only by learning to move on from the past that never was can they both find peace. Meanwhile, another specter haunts the world. A war is brewing once again between the ways of old, and the way of the future. Dreams of world revolution and a classless society reignite, and soon the world will be divided between those who wish for a brighter future, and those who cling desperately to their own past that never was. Soon, the recently emerged monsters will need to choose what role they will play in this conflict, and what their place will be in the world.
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IT'S THAT TIME OF THE YEAR!
Kinktober time~!So yeh this is basically short drabbles of smut. Some will be longer, some will be shorter but I'm gonna try my best to make them juicy~
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Writing ideas that come to me at the moment, which may or may not be inspired by: Music, my drawings (or others), and/or other fanfics/videos.
For example: (I drew this)
Title: "The Radical Paradox" -Idk-
Relationship: Brotherhood.
Where Fresh (a parasite) feels a certain need to check on Doc (or Sci) to see if he's okay. This happens when Doc receives too many visits due to his knowledge of the multiverse, which leaves him exposed to danger and other... insinuations.
No one is happy with this arrangement (right?), which leads to various situations.- Language:
- English
- Words:
- 2,214
- Chapters:
- 2/?
- Hits:
- 8
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A Remnant of Your Soul by CrossoverAU for pinkladysuicide
Fandoms: Undertale (Video Game), Five Nights at Freddy's
31 Oct 2025
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Nightmare needed what this Fell verse seemed to have. His boys have worked with this one before. It seems he has a new mission for them.
Killer didn't want to leave the castle. He didn't want to go down there. He didn't want to be trapped again. But he'll do it, for his boss. Close spaces always bring out the worst in him. Especially when the people he loves are around.
Dust was stuck with the two idiots...his two idiots. Going down there. He didn't know what it would mean. But without magic, he was practically harmless. He needed them to be kept close. Kept safe.
Horror didn't know how to feel about this mission. There was something going on. He didn't trust it, and he certainly didn't trust this weird voice talking to them. That thing better stay away from his family.
Red didn't wanna do this! He just got dragged into it for no reason! Stupid Nightmare's gang. Fuck them! He could only hope he survived to see his brother again.
Aka Murder time trio and Red in sister location!!!! Because it's my love's birthday so she gets this, happy birthday, babes!
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The RESET button is pressed. No surprise. Another wound inside Sans tells him this wheel will never let go. The world around him melts, everyone forgets themselves, forgets what happened between them. The ketchup flies back into the fridge and dissolves with it into nothingness.
He accepts this with restraint, ready to face the void, to be a toy in someone else's hands.
But then he is torn from the shroud of nothingness, a golden light penetrates Sans, and he opens his eyes in a different... place.Sans and Allesandr full-length - https://ibb.co/V0WCqq4c
Sans (in battle, cover, AI) - https://ibb.co/qMPFB3Ks
Sans (AI) - https://ibb.co/NdYkS4bh
Allesandr Ethelien (sims) - https://ibb.co/4Fb2nwX
Allesandr Ethelien (in battle, cover, AI) - https://ibb.co/kfbS276
Allesandr Ethelien (profile art) - https://ibb.co/21XQYdgR
Mike Armory - https://ibb.co/YTPtmWV
Papyrus(spoiler) - https://ibb.co/fYXWcrZ3 -
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So, I heard you like skeletons...
Reader insert prompt fills for @skeletonh0e's sans-centric Kinktober challenge on tumblr
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The Seven (Plus Chara) have done it; they've ended the imprisonment of all monsters. With Frisk as their ambassador (and Papyrus as mascot), things are sure looking up!
But in the background, things are at play, events that could threaten everyone's happy ending.
After all, just because one story ends it does not mean the Tale has.
Series
- Part 2 of Hall of the Seven
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All you wanted was some ramen after a long night of catching up on your school work. Imagine your surprise when a colorful skeleton falls through your ceiling with nowhere else to go.
Feeling compelled to help the poor monster, you allow him sanctuary within your cozy little apartment while he figures out a way home.
You never would have imagined how that decision would change your life forever.
For better...
... and for worse.
(Or, Ink crashes through you ceiling and makes your life a living hell.)
(Updates at least once a month!)