1 - 20 of 790 Bookmarked Items in Swapfell Papyrus (Undertale)
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Summary
Hold tight.
When the barrier fell, the spell preventing humans from using magic broke with it and you, along with your twin, became one of the first mages in a millennia. The monsters emerged from beneath the mountain hungry for retribution against the humans who trapped them there and the newly formed Circle of Mages responded in kind, launching the start of a bloody conflict.
Three years on, the two factions finally agree on peace terms. You are the Second Mage, subordinate only to the First. You want one thing: justice for the death of your twin at the hands of a dust-mad monster.
Pull.
When a soulmate bond snaps into place between you and Captain Sans Serif's brother, Papyrus, your goal becomes harder to pursue. The unfulfilled bond between you and the Captain only complicates things further. Your rage burns, warring with the two new links that have been thrust upon you.
Sacrifice, you find, has many faces, and all of them are looking at you.
Break yourself in two.
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Bookmark Notes:
Good stuff. I long for swapfell sans x reader
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Bookmark Notes:
Absolutely lovely
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Bookmark Notes:
Ch4
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Summary
You’re six months into your career as an electrician and for the first time in your life, you’ve got your shit together. Go you!
When the job brings you to a mansion inhabited by skeleton monsters and your ex-girlfriend, things change. The wiring in the house is fried, the skeletons are suspiciously evasive about the basement, and your ex keeps inviting you for sleepovers.
You just want to get through the repairs without setting the place on fire. Keeping your sanity intact would be a nice bonus.
Or another anti-harem fic, but in this one, the girlfriend is into you too.
Series
- Part 1 of Circuit Breaker
- Language:
- English
- Words:
- 80,666
- Chapters:
- 13/?
- Comments:
- 787
- Kudos:
- 1,305
- Bookmarks:
- 360
- Hits:
- 27,783
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Bookmark Notes:
Love this story!! Hoping for an update
Ch13 -
Bookmark Notes:
We love a well done fleshed out oc! The harems cool too lolol
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Rus' brother got himself banned from another of his favourite coffee shops for his silly shenanigans. Black's only option now is to send his nervous little brother in to retrieve his favourite cup of coffee. Thankfully for Rus there is a really nice (and beautiful) girl there.
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You had to leave that place, you knew transferring wasn't going easy but you couldn't stay, you just hope this time... this place... these people... it could be better. You just didn't quite expect to be meeting this many Skeleton monsters never mind just on your first day. Maybe these guys could be your freinds, your allies...? Only time will tell.
A reverse harem fic focused on Sans and Papyrus from UT, UF, US, SF.
Inspired by a flufftober prompt list-
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Coming back for this
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Sans has put in the bone work.
For fifteen years, he's raised Papyrus.
Not even counting the time loop.
And now some pretentious ancient bones want to have a say?
Oh hell no.
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Said "ancient bones" are mortified.
How were they supposed to know the short depressed skeleton was barely two decades old?!
- Language:
- English
- Words:
- 200,233
- Chapters:
- 48/?
- Comments:
- 1,741
- Kudos:
- 1,324
- Bookmarks:
- 288
- Hits:
- 45,281
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12
Restante
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A Human and A Monster Walk Into Electrical... by Shatterflowerdemon
Fandoms: Undertale (Video Game), Among Us (Video Game)
12 Jun 2021
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Summary
You've known Mutt for months now and have been traveling with him for most of that. These are your experiences in space. Things get weird and weirder, probably.
Mutt attracts awkward like Mothman to the world's largest lamp.
Series
- Part 35 of Reader inserts
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Summary
The monsters are free from the underground, but they didn’t all make it. Papyrus, Sans younger brother is dead, leaving Sans to care for the two children he left behind. After a long night of work Sans finally relents and hires a nanny/housekeeper. Enter you, just another human down on her luck and running from her past. This job seemed like an easy way to pass the time and get paid until your past inevitably caught up to you. At least that’s what you thought, until you started developing feelings for the odd skeletons. Now you're having strange dreams, and all these new skeletons keep turning up.
Can you help them? What is Sans hiding? And what is with this new gaggle of skeletons?
************decided to update the rating to mature because, well, we all know where this is going.******************
Series
- Part 1 of It's not all roses AUs
- Language:
- English
- Words:
- 169,855
- Chapters:
- 53/?
- Collections:
- 1
- Comments:
- 628
- Kudos:
- 583
- Bookmarks:
- 138
- Hits:
- 23,318
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Undertale aus with kid reader! by I_is_so_cool
Fandom: Underfell - Fandom, Undertale, Undertale (Video Game)
24 Feb 2025
Summary
Just some cute lil one shots with random aus and a kid reader :) any requests in the comments!
- Words:
- 28,283
- Works:
- 17
- Bookmarks:
- 23
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Summary
You're new around here and just trying to get by.
You really should've known better.
*A SWAPFELL FIC*
This time, with he/him pronouns! (Includes some content from The Hamper where the Reader was gendered)
Series
- Part 3 of Swapfell Indigo
- Language:
- English
- Words:
- 182,622
- Chapters:
- 38/38
- Comments:
- 158
- Kudos:
- 571
- Bookmarks:
- 157
- Hits:
- 25,243
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Bookmark Notes:
chap 32
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How To Be A Human Being by JayBird421
Fandom: Underfell - Fandom, Undertale (Video Game)
06 Jul 2025
Summary
A tale of seven human souls, and two *not* so human souls. (what length will a person go to for survival? where do you cross the line between simply surviving and actually living?)
I'm being dramatic actually, but these fics are pretty cool :D
- Words:
- 352,743
- Works:
- 7
- Bookmarks:
- 18
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Bookmark Notes:
16of2 5of6
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Summary
One day, you wake up in the body of an otherworldly being, impossibly far from home and lacking most memories of your past life. Your body's first and original occupant is who transported you here by pure accident, and created an infrangible link between your souls, melding the both of you into one.
Five years after you were first tugged into this alternate reality, you thought the storm had calmed. Then the machine that caused your life to turn topsy-turvy reactivated by itself. And it just happened to pull you into yet another universe, this time filled with variants of yourselves.
Hiding your nature had never been easy, but you seriously underestimated how stubborn all these skeletons are.
Series
- Part 2 of Tales of Odin's Wolves
- Language:
- English
- Words:
- 122,224
- Chapters:
- 20/?
- Collections:
- 2
- Comments:
- 930
- Kudos:
- 1,788
- Bookmarks:
- 416
- Hits:
- 47,048
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Monsters have come to the surface, and with that a lot of probelms have been caused, so maybe a marriage between two people from the two races might help?
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Bookmark Notes:
36
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You watch them suggest names and argue with each other as you stand there dutifully like a newly-adopted dog. Rus sidles up close to you and looms over you like a hanging specter. His smile does not look friendly.
“How about..Snowy,” He suggests, his grin widening at the twitching grimace on your face.
How to survive a blizzard and nonconsensual teleportation to a dilapidated sci-fi basement.
- Language:
- English
- Words:
- 200,655
- Chapters:
- 11/?
- Comments:
- 289
- Kudos:
- 869
- Bookmarks:
- 236
- Hits:
- 19,053
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[Swapfell/Fellswap] (Sans- Blue magic)
Sans fucking hates heats. He's skipped them the last dozen cycles and pays the aggressively submissive price.
Papyrus is willing to help but questions his Lord's (probably) heat-induced kinks.
Series
- Part 3 of What Comes After Thrice, Anyway?
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Returning home is hard, especially after the fact you ran away to marry someone. It's been almost ten years since then and you come back to your grandma gravely ill and skeletons living on your parents property.
You've missed a lot since you've been gone.
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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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Bookmark Notes:
48
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A Trip to the Beach by NightlyRayne for lollipopkitten93
Fandoms: Undertale (Video Game)
25 Jan 2020
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Summary
You take a trip to the beach with all the skeleton boys. But two decide you're theirs for the night~
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Reader Inserts by MrMiss
Fandom: Five Nights at Freddy's, Subnautica (Video Game), Undertale (Video Game)
06 Jul 2025
- Words:
- 301,382
- Works:
- 12
- Bookmarks:
- 37
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Bookmark Notes:
Fun to read.
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A Pony's Tale by NumberOneNezuFan
Fandoms: Undertale (Video Game), My Little Pony Generation 4: Friendship Is Magic (Cartoon 2010)
02 Sep 2023
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Summary
*also disclaimer Ebott takes place in Canada, but I know jack shit about Canada so google is currently my best friend at the moment.*
Ayla suddenly woke up in a facility 7 years ago as a monster with no memory of where she came from. Then 5 years ago a women drops of a baby who is the same type of monster as Ayla. Now it's just her and that child. What will happen when somebody finally decides to take them in?
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Undertale
MLP
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Summary
“What is a delicate miss like you doing here? Don’t you know the old saying: Curiosity killed the cat?” the grinning man says as he slowly walks toward you with a sledgehammer resting on his shoulder.
“Oh, I know that one very well, mister,” you smirk, turning around, “although, you got it wrong this time. You see, the curiosity didn’t kill the cat,” you take off the hood concealing your face, your left eyesocket flashing with golden flames, "𝗯𝘂𝘁 𝘁𝗿𝗮𝗻𝘀𝗳𝗼𝗿𝗺𝗲𝗱 𝗶𝘁 𝗶𝗻𝘁𝗼 𝗮 𝘀𝗸𝗲𝗹𝗲𝘁𝗼𝗻 𝗶𝗻𝘀𝘁𝗲𝗮𝗱."
It had been three years since the fall of the barrier when the strange disappearances of monsters and people began. Of course, you, as the very passionate lover of mystery novels and snoopy greenhorn of a detective, couldn’t let that mystery escape you and so you stuck your stupid nose into that strange case. Big mistake. You got caught and experimented on, even made into a dang skeleton! After two years of suffering, a chance to escape appeared. With nowhere else to go, you sought refuge with the monsters, meeting a particular set of weird skeletons that later on became your whole life. What secrets are they hiding and will you be able to expose the masterminds behind the sinister conspiracy?
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Bookmark Notes:
Reader gets experimented on and becomes a skele. Tori sends the skele man to fetch her home