1 - 20 of 3,499 Works in Papyrus (Undertale)/Reader
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You, dear reader, have been transported into your own AU — as Sans.
Just when you’d begun to settle into this new, bone-white life, one small mistake sends everything spiraling.A malfunctioning machine, a flash of blinding light, and suddenly you’re falling through worlds — each one a reflection of stories you once imagined, and others you never dared to write.
Gaster calls it an experiment. Papyrus calls it an accident.
But Sans — your Sans — knows it’s something deeper.Every jump takes you further from home, and closer to the truth behind the tether binding your souls.
Will you find your way back… or lose yourself to the story you created?Whatever happens — the worlds will never be the same now that you are part of them.
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Alternative Title: I Found Myself In An Isekai Styled Game Of A Game I Barely Know
How’d I get so lost that I found myself in a different dimensional plane?
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“why is it… every time i see you, your flavor text is always written as ‘confused’.”
“… It’s my default….”
“i find it funny how you sound both confident and confused with just that.”
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Basically you fell in the middle of the Underground and you just remembered this is a game you played once and never thought about it again. No amount of isekai mangas, reincarnation manhwas, and magical manhuas could ever prepare you for what you should do in situations like these. Because honestly, the fact that you know absolutely nothing outside of playing the neutral route was already a disadvantage.However, you can’t remember if there was an element to the game that included the enslavement of the whole monster race after they got out of the Underground.
Nor can you remember that there was any sort of color to the status windows that keep randomly popping up out of nowhere. Not that you were complaining since these status windows are what keep you alive from this… chaos…
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You are a shapeshifter with the rare ability to turn into an orange fox—a secret you’ve kept hidden, knowing humanity once hunted your kind. Living near Ebott, you slip into the night to run free, though the fear of discovery always lingers. Meanwhile, Sans and Papyrus have unknowingly welcomed a manipulative woman named Kora into their lives.
Behind her sweet facade, Kora is a gold digger using the brothers for wealth, status, and comfort, willing to lie, fake affection, or even blackmail them if needed.Eventually Kora stumbles across your apartments terrible condition, deciding to become “friends” with you and inviting you to stay in the mansion with her and her apparent mates. It started off fine, until she began to spread lies— rumors.. Even blaming you for mistakes, stealing. And god who knows what else.
Maybe you can help these skeletons see past whatever game she’s playing at? (Anti-Harem, That’ll switch into a actual harem..)
As well as machine chaos.
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Skeletons, roommates, yea no by UnderTrash
Fandoms: Undertale, Underfell - Fandom, Swapfell - Fandom, underswap, female reader - Fandom, SAN’s x reader, Papyrus x reader - Fandom, bullying - Fandom, Mutt from swapfell, undertale x reader - Fandom, Grillby’s, reader getting bullied, (y/n) - Fandom, Selfharm - Fandom, cheating - Fandom, Mutt x reader - Fandom, Underfell sans Red, Red x reader - Fandom, G sans - Fandom, G pap - Fandom, Mafiatail bros, roommates - Fandom, Fanfic - Fandom, anxious reader - Fandom, Mafiafell bros - Fandom, reader as mantle breakdowns, Killer sans - Fandom, Killer sans is a asshole, Killer x reader - Fandom, mental illness - Fandom, Non-Consent - Fandom, sexual harassment - Fandom, Romance - Fandom, Poly relationship - Fandom, Mafiafell sans - Fandom, Mafiafell Papyrus - Fandom, AsylumTale sans - Fandom, Lusttale sans - Fandom, Lusttale papyrus - Fandom, lustfell sans - Fandom, Lustfell papyrus - Fandom, friends to lovers - Fandom, Y/n just going through trauma, Chubby reader insert - Fandom
10 Nov 2025
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You’re a bit of a nervous wreck type of girl, chew on ice as you hide into your room. Though no one could blame you, after all you lived with asshole skeletons that makes it their goal to push you around and bully you.
Why you may ask?
ALL BECAUSE A BITCH NAME LILIAN!
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They all hate you but if they gave you a chance they might like you…
(Heavily been Edited PLEASE RE-READ ) nov/13/2023 - feb/12/2024
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You have had a tough life that has left you scarred and untrusting of others. Growing up in a mage family obsessed with power and ensuring their lineage, you are the black sheep of the family, possessing a green soul of kindness and excelling in healing and growth rather than the combat magic your family specializes in. Trapped in a loveless relationship with a controlling, abusive partner chosen by your family to ensure a 'proper' match, you live in fear of triggering his anger, often resorting to your magic to heal yourself. Every aspect of your life is controlled by someone else, leaving you resigned to survival and scraping together what happiness you can.
What you could never foresee is the way a miserable night out with your fiance would lead you to a drunken one night stand with your soulmate.
Nor could you predict you would have 9 more soulmates out looking for you.
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You and your family are just enjoying a nice day at the park, when a life changing event happens that ruins everything.
You get taken away to a facility to be tested on...
Life doesn't feel as peaceful as it once did, you hated your new life.
"I wish I could just go into those story books I used to read..."
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Three years into college and of course shit hit the fan. Thankfully for you, your good friends Sans and Papyrus are able to help you and offer you a room in their house when things go sideways for you. The catch? You get to meet all of their family and join in on the chaos that is the Serif family.
What could possibly go wrong?
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Falling into the Underground wasn’t on your to-do list. Falling for two skeletons definitely wasn’t either.
Blue is sunshine bottled in bone—sweet, loud, and determined to make you smile even if it kills him. Rus is quiet, steady, and the kind of person who remembers your favorite tea. Between the two of them, you’re constantly flustered, overfed, and very, very loved.
When both brothers realize they’ve fallen for you, chaos ensues—except it’s the polite, apologetic kind of chaos where no one wants to hurt anyone else. What starts as a tangle of awkward affection becomes something honest and warm: a relationship built on trust, laughter, and a whole lot of skeleton hugs.
“WE CAN SHARE THEM!” Blue insists, bright as ever.
Rus sighs. “That’s not how dating works, bro.” -
⋆˚࿔ "I'd Rather do Normal "People" Things...Thanks!" ⋆˚࿔ by Cr8ter_Eight
Fandoms: Undertale (Video Game)
09 Nov 2025
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You are a Normal Person.
You wake up.
Brush your teeth.
Comb your hair.
All that jazz.One day, you do the same thing.
On that same day, you don't notice that an Insanely huge skeleton has tumbled out of your closet.Amazing.
(Previously named: "Skellies in my Closet" & has currently been revised!) -
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You had been playing an immersive VR game: The World Of Aspenheim. However, after 10 years, the servers were about to close and to give your last farewells, you decided to stay online until the servers kicked you out. In the end, you fell asleep on the golden throne...
Only to wake up still logged into the game!? And why couldn't you log out!? And who was the one knocking on the door!?
"YOUR HIGHNESS? ARE YOU AWAKE?"
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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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You should be dead. Everyone else in this god forsaken city died as soon as the barrier came down and these creatures, these MONSTERS, invaded Ebott City. You got lucky, or maybe not.
You had the bloodline of a mage. Which meant you could create barriers. In a moment of panic you had created a barrier in your apartment, locking you and your neighbor inside, and the monsters out.
But now the clock was ticking and you had a group of skeletons sniffing around your apartment, telling you that they couldn’t wait to drag you back to their den.
They meant as food…. r-right?
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Seeing a murder in an alleyway was the last thing Riley ever thought she’d see happening in her small town WestonVill. Having the murder disappear over night and the murders move in across from her was also something she’d never expect to happen. But here Riley Dottingham was, being pursued by one of the mentally unstable skeletons.
If she could only figure out what he wants from her.
Series
- Part 1 of Being Neighborly
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You are a one-of-a-kind human being, and you can't let anyone capture you.
Everything was fine until you encountered these skeletons while sailing the seas undisturbed.
And they seem to be a little too interested in you now. They won't let you go that easily.
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A spin off of Okami_Norino's story Kittynaped with a darker tone and twist.
You, a dog once loved and cared for, had been fighting in a place called the Ring for far more than you could remember. Yet on a wet thunderous day you had somehow managed to escape. With the so called 'King' of the ring on your tail along with his lacky you find yourself cornered and attacked until this really scary wolf looking dog saves you. Although a complete prick and an asshole you agree to see through the favor he expects of you now. The only problem? His "pups" aren't exactly puppies. Instead you are now stuck trying to heal your injuries with two grown ass wolf-dogs!
Ooh! You promised that day that when you see Gaster again you were sure you were going to bite him. -
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Summary
Seeing a murder in an alleyway was the last thing you ever thought you’d see happening in your small town WestonVill. Having the murder disappear over night and the murders move in across from you was also something you’d never expect to happen. But here you were, being pursued by one of the mentally unstable skeletons.
If you could only figure out what he wants from you.
Series
- Part 2 of Being Neighborly
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A mutation has spread across the globe when monsters were released, humans either dying as their bodies couldn’t handle it or mutated with the rest.
The mutation was simple really, a change of dynamics. Humans started taking more unusual forms, growing more than a few ears, eyes, arms, legs, shit even a head at one point. Or body morphing differently altogether. Turning into their worst nightmares.
Y/N being a young child at the time of the outbreak changed with the rest of her family, half of her family died or killed themselves resulting in her being an Orphan at a young age, left alone in the world as her body shifted and changed. Body becomes leaner, smaller…cute. Cat-like ears and tail sprouting from her body, legs breaking and reforming into back hind legs of a cat's, fur covering her legs stopping at her waist.
Not only that, but she is an Omega.
Of course she doesn’t know oh no no no blissfully unaware, well that is until an over caring human Frisk decides to visit the Orphanage dragging along her friend Chara. Whom in turn absolutely dreads the visit. Let's say…frisk was the door to meeting a rowdy group of skeletons…
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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 story has LONG chapters. I’m not sorry**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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Hypersomnia (Insomnia Rewrite) by KovalSorrow_z
Fandoms: Undertale (Video Game), The Borrowers (TV 1992)
05 Nov 2025
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An scientist. Or what you called yourself, a mad scientist? You probably just wanted to sound cool. So much to the point of every other borrower wanted to explicitly kick you out of the pack. The only reason for your own mind hasn’t done such was because you were currently working on a medicine to help the sick borrowers.
But time was getting cut short.
(Borrower Reader!)
- Language:
- English
- Words:
- 1,102
- Chapters:
- 1/?
- Kudos:
- 7
- Hits:
- 90
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Skeletons Like Honey Buns: Horrortale Edition by YinYanChan
Fandoms: Undertale (Video Game)
04 Nov 2025
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Summary
You and your daughter Amelia have left a highly abusive situation with your ex. Poor Amelia has silenced herself to protect you and herself for the longest time. You had been afraid to leave but the moment he started to go straight for your daughter and not you? Gave you the courage to leave and spirit your daughter away to an old house that belongs to your Great Aunt. She had fallen and broken her hip, knowing how far you've come she offers you her place to stay while she recovers in a facility... though before you leave... she says things tend to go bump in the night.
Series
- Part 3 of Skeletons Like Honey Buns