1 - 20 of 173 Bookmarked Items in Undertale Fics I Love
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Maybe next time you work around Monsters, you should check the ingredients in your perfume oil first.
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sans brings home a machine (one that’s already ruined his life more than once, by the way.) it malfunctioned, tore holes through reality, and dragged in his counterparts from places that he shouldn’t have business knowing existed.
so when the machine activates on its own once more, he heaves a sigh and slumps down, mentally kicking the bucket. nothing surprises him anymore; the machine convulses like it always does and he expects another version of him to tumble out. he gets his speech ready and—
oh. it’s a human.
- Language:
- English
- Words:
- 106,860
- Chapters:
- 24/?
- Comments:
- 220
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- 616
- Bookmarks:
- 146
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Same You, Different Font by radskull69
Fandoms: Undertale (Video Game), Deltarune (Video Game)
14 May 2026
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Ah yes. The classic ‘’Heather’ convinces the skeletons you’re an evil human so now it’s a EVIL reverse harem’. Right?
Oh? But what’s this? A TWIST?
Sans couldn’t live with himself after what happened to you, going near insane after you’re gone. So behind the others back he uses the machine to undo what he did, except it didn’t. He can still feel his sins crawling on his back.
Oh well, it’ll all be worth it once he has you back in his cold hands again. Screw the other skeletons.
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Schrödinger’s Cat Theory;
‘A person may be considered simultaneously both alive and dead as a result of their fate being linked to a random subatomic event that may or may not occur.’
__________ ______ ___ _
It’s survival of the Fittest in the Underground, with both Monster and Human fighting for power, respect, food, territory, and SOULs.
You’ve managed to survive, making choices that have saved your life time and time again.
It was all up to Chance. . .
And with the name you’ve been given by the residence of the Underground, you’ve gained respect and power. It was the way of life, it was survival. . .
So what are you supposed to do when you’re suddenly ripped away from your way of life and expected to act the same as the woman who wears your face in this Universe?
By Chance, you’ll try to Survive.
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A Bleeding (RED and PURPLE) Heart by Silksong02
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga), Undertale (Video Game)
28 Aug 2025
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They had finally escaped the underground after years of resets. So naturally the first words that were said… “I didn’t expect the surface world to look like this. I wonder if they have spaghetti?” Said by everyone’s favorite orange scarf wearing Skeleton.
…….
We find ourselves on a roof with a boy getting his dreams crushed. But what if there was someone else there to offer a chance? To offer a new path and new future? Well maybe it’s not so what if anymore.
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Spending Spring Break Underground by 4Trixs_Animations3
Fandoms: Undertale (Video Game), 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga)
06 Jun 2026
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Once upon a time many centuries ago, the world was ruled by two species: Humans and Monsters. Both of these creatures thrived together using their special talents to help one another. That was until the humans declared war on the monsters out of the blue. This led to the monsters to be banished beneath a mountain.
But rest well when I say the humans suffered their karma. Without monsters they soon lost their magic, along with their way of life. They developed their own powers called quirks, with this power came the raise of heroes and villains. Quirks were quick to spread until only 20% lacked them.
It wasn’t long before magic and monsters were reduced to legend. This led many to climb the mountain to see if the legends were true, only to never return. This was because of the heartbroken monster king who put a bounty on every human who fell.
When the last human fell, the monsters were ecstatic. Finally they’ll be free to wander the surface to feel the sun and the rain again! But unbeknownst to them, they have become even more trapped than they had before. With each reset the monsters were forced to live the same day over and over without anyone knowing ... .Well, almost everyone.
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Hey, brother/Do you still believe in one another?/Hey, sister/Do you still believe in love? I wonder by AmazingAroAce
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga), Undertale (Video Game)
02 Apr 2026
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(title - Hey Brother, by: Avicii)
One of Error's portals glitched out, or perhaps broke, right as Dream and Nightmare are thrown in. Now the twins are stuck in the world of My Hero Academia without a way to get back on their own.
Series
- Part 29 of My MHA fics (hope y'all like them!)
- Part 5 of My UTMV fics (hope y'all like them!)
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You didn’t know where you were, you haven’t for a long time, but at least then you were familiar with your surroundings.
After being rescued by Papyrus, you were appointed as his ‘guard dog’. Everywhere he went, you would follow, looking out for threats against him and the Snowdin community. Even as hunger ravaged the underground, you stayed loyal, protecting the monster that saved you from frostbite and starvation.
Now you are in an unfamiliar basement with a hoard of monsters that look just like your Papyrus and Sans, and you were going to protect them with your life or die trying.
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While walking home, you get followed by a group of cat-callers. Panicking, you slip into the nearest gas station and call the first number you can think of, your overly intimidating neighbor and tentative friend, Black. His brother picks up instead.
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- Part 3 of Fluff Fics (Random Word Prompt)
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It seems like your hiking trip has gone quite awry as you now find yourself hundreds of meters underground.
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"We're alerting the King of your presence. In the meantime we have food to restore your health." Says a booming voice. Okay, food, that's got to be good. Someone holds a sandwich near your face, which you eat from their armoured hand. You had been more hungry than you'd realised and are now feeling worlds better. You roll onto your back and look up. Right above you there's a hole in the ceiling revealing the afternoon sky. No, ceiling wasn't the right word for it, it's just the ground which is above you right now. Rock and earth and vines endlessly going up until they reach a sizeable crack of sunlight. That must have been where you had fallen from.
You push yourself up off of the floor and take a look around. Pretty yellow flowers cover the ground; they must have broken your fall. Your bag is crushing a few next to the indent where you'd landed.
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Papyrus was a monster larger than life. He grinned brightly and wore the goofiest mismatched clothes as he helped little old ladies across the street.
He was also loud. He screamed and stomped, and he scolded his brother in a way that shook their whole house. He towered over you by at least two heads, and if he hit you, there'd be no makeup in the world that could cover that bruise.
So… you dodged him, just like you dodged everything nowadays. You were more than happy to avoid your neighbors.
Until you saw the dog.
Maybe there was one neighbor you didn't want to avoid.
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"MY. DOG. YES, UM, MY DOGGY FRIEND NAMED BUDDY IS AT FAULT FOR THE HOLE IN YOUR FENCE! AND WHAT KIND OF …OWNER WOULD I BE IF I DIDN’T TAKE RESPONSIBILITY FOR HIS DOGGY CRIMES? CRIMES THAT ARE TOTALLY UNRELATED TO ME, BY THE WAY, EXCEPT FOR THE FACT THAT HE IS MY DOG."
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Aka the fic in which Gaster blaster!Papyrus pretends to be his own dog to obtain pets from the cute neighbor lady because she is, inexplicably, less terrified of the giant bone dragon than she is of the clumsy two-legged skeleton.
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In a dog eat dog world, you just run a little sweets shop.
In a dog eat dog world, Papyrus is just looking for something soft to keep close.
- Language:
- English
- Words:
- 21,638
- Chapters:
- 21/21
- Comments:
- 324
- Kudos:
- 846
- Bookmarks:
- 167
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- 10,935
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Papyrus attends college and you are his Human Tutor by Spectascopes
Fandoms: Undertale (Video Game)
21 Mar 2026
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Papyrus, now a surface-dweller, decides he's going to go to college to meet human college students and become wildly popular. Being the first monster student at a human post-secondary school inevitably comes with a unique set of social challenges, but Papyrus is nothing if not capable! With the help of a new human tutor and his family cheering him on, he will acquire every degree possible and then some.
You are a part-time student who gets asked to help out the new skeleton monster you've heard screaming in the halls, and you couldn't say 'yes' fast enough.
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The House Like 4 Minutes Away (if you speed walk) by akiimbo
Fandoms: Undertale (Video Game)
25 Mar 2026
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This fic was heavily inspired by “The House Next Door” By Battlemaiden13 and “The House on Lane 66” By OolongTeacup :333 It’s a little like a hybrid of the two but with my own little things mixed in there. I actually doubt anyone is gonna read this but I’m posting it ANYWAY
*ੈ✩‧₊˚༺☆༻*ੈ✩‧₊˚
Your life was beyond boring.
No “irl” friends + shitty job = no parties, or hangouts, or long ass calls with friends that lasts hours at a time, day wasted spent laughing at absolutely nothing but everything at the same time. The fact you lived 20 minutes away from town didn’t help, either. Your humble little 2 story cottage home was isolated at the top of a steep hill, a ways from town and quarter a mile away from an abnormally large, probably haunted creepy wooden mansion. That’s probably why the house was so cheap, a cabin surrounded by forest next to a Halloween attraction would probably scare away any other normal person. Perfect for someone like you, fuckin’ weirdo.
(Guess who lives in that mansion.)
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The arrival of monsters from Mt. Ebott threw society into disarray. Not only was a previously unknown species discovered, but the shattering of the barrier released centuries of magic back into the world. As society struggles to move forward from their bad history with monsters, MOPA, “The Monster Obligated Placement Act” was formed. As such, all mages must provide housing for a minimum of one year for a MOPA designated monster family.
Having jumped through enough hurdles to kill a horse, you are finally forced to house a family of your own.
Between eight skeletons of varying color schemes, your reluctant past, forgotten dreams, and a desire to make up for your sins, you are forced to use your wits in a world breaking at the seams.
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- Words:
- 12,113
- Works:
- 2
- Bookmarks:
- 5
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Decay was persistent. Anyone who had survived the Final War was cursed.
Your closest friends, the eccentric Serif brothers, were persistent in their efforts to keep you lucid. It was a losing battle. Still, you played along, indulging them in their game of make-believe. You would treasure the memories while you still had them. But nothing was permanent.
…It was sudden. A split second. An abrupt force hooked onto your long forgotten soul, dragging you and the brothers into an alternate universe.
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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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Summary
A series of semi-connected Soulmate Fics
- Words:
- 28,881
- Works:
- 3
- Bookmarks:
- 11
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Dream and Nightmare play tug-of-war with a god and everyone else gets dragged into it
- Language:
- English
- Words:
- 18,498
- Chapters:
- 6/?
- Collections:
- 1
- Comments:
- 13
- Kudos:
- 142
- Bookmarks:
- 34
- Hits:
- 1,773
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