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Life isn’t fair, case in point, you didn’t expect to be trudging through the snow to the corner store to pick up some much needed, over priced, feminine hygiene products while trying not to bleed all over yourself all because you failed to remember to pick them up with your normal shopping. That’s the thing, no one ever said life was meant to be fair did they?
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Promises were just words, promises of home, safety, love. Only ever worth something if the person kept those words close to their soul. That was something he learned pretty damn quick. Built for love, to be a friend, a companion, tossed into the rings to be a fighter, something he was never meant to be. The only promise he knew he could trust were the few he made to himself, the promise to never fall for the sweet lies of a pretty face again.
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What happens when two souls who honestly need each other, don’t know how to open up and trust? Can love, trust, and home be found when the world has proven that trust is a dangerous thing? Can they get over the hurt that this unfair world has piled on them? Open up to each other and maybe, just maybe find the home they both need? -
The Purest Soul 💙 by Sinsational_Sinnabon for merrinbrite
Fandoms: Undertale (Video Game)
21 Dec 2025
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The leader of the human province, and head mage, Cadoc, has no qualms in letting anyone willing to listen know that his third daughter—an unassuming girl with a deep blue Soul—has the most powerful magic known to mankind. She's able to perform feats that would make the entire monster kingdom tremble in fear. She may even have enough magical prowess to tip the scales of power between the already tentatively peaceful neighbors.
Reluctant to violence, but hand forced with the protection of his recently unearthed populous, King Asgore levels the humans with an offer. Hand over this Blue mage to be paired with his Son, in a show of unity between their nations. Eager to breach the tall walls of their secret kingdom for information, Cadoc agrees.
Unbeknownst to all, there's a third party at play, who's been intently watching the Head Mage's daughter as she spends her time in the meadow between their lands. She's nothing like everyone says she is... and soon he finds he's fallen for her—hard.
When the Prince agrees to switch places with him for the courtship ritual, her secret admirer will have to win her heart, and Soul, sight unseen. But can he keep pretending he's someone he's not?
Series
- Part 6 of The Butterfly Effect 💚💛🧡💜💙🩵❤️
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An action-based fantasy fan novel about the popular game Undertale. Taking place within a vastly different alternate universe from the main one, 25 years after the freeing of monsters, watch as a young child named "Javelin" learns to grow through his own naivety while keeping the people around him and the world itself safe from a dangerous new threat.
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Crossed Wires: Living Compatibility Trials by Fallen_Butterfly
Fandoms: Undertale (Video Game)
21 Dec 2025
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After the barrier shattered, monsterkind was granted full rights on the surface—but decades of isolation made monster-human relations complicated. Misunderstandings run deep. To combat prejudice and promote peaceful integration, a media-backed government program launches a hybrid initiative:
“Living Compatibility Trials” — a televised social experiment where randomly-paired humans and monsters cohabitate for 90 days, with full documentation (and viewer votes) to study emotional/social compatibility, challenge stereotypes, and promote interspecies unity.
Participants get a generous stipend, housing, and an out-clause after the first 30 days. The catch? Everything is filmed. Every interaction becomes public.
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a socially-anxious human in her 20s, signs up for the Coexistence Co-Op part of the program—intending to live with, small ice monster or shy bunnyfolk.
Sans, a ex-sentry-turned-lazy-lab-consultant, was accidentally routed to the wrong show—he thought he was joining a quiet integration test run for introverts.They’re paired anyway.
And the cameras love them.
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New city, new start.
Not that you're running from anything, of course. It's just time to break free from the small town you grew up in, the one that never felt like home, to break out into something bigger. For yourself.
Unfortunately for you, your new neighbor is an asshole. A very hot, very charming asshole.
And he won't seem to leave you alone.
You're not sure if you want him to.
(Fem POV on this one guys)
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Tails and Alphys love story by RisingTails
Fandoms: Sonic the Hedgehog - All Media Types, Undertale (Video Game)
21 Dec 2025
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Tails and Alphys start to notice something between them
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Life underground may have had it's drawbacks, but Sans' life was infinitely better. As much as he wanted to see everyone's dreams of the surface come true, he never wanted to end up back on the surface again.
And then one day, it breaks, and Sans has to go back to a world that wanted him dead. He can't let the ones he cares about down, so he has no choice, but to proceed.
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Sans and papyrus are missioned to go undercover, to try and get close to and figure out things about a spy called y/n l/n
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Ink was never meant to play god, but desperation has a way of rewriting rules. With Error closing in and entire timelines being erased, Ink makes an impossible choice: he fuses countless Undertale AUs into a single reality, hoping to preserve every version of Sans and Papyrus at once.
What he doesn’t account for is an anomaly.
Y/N exists where no one else like her does. No alternates. No echoes across universes. While everyone else has infinite reflections, she stands alone.
The combined AU reacts violently to her presence, binding itself to her soul and turning her into its living core. The Anchor. As long as she lives, the universe survives. If she dies, everything, every AU, every timeline, every version Ink tried to save, will collapse with her.
Now hunted, protected, and feared in equal measure, Y/N is trapped at the center of a multiverse that cannot exist without her. Ink must face the consequences of his creation, Error sees a new way to end it all, and the fate of every world rests on one human who was never meant to matter this much.
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Monsters have been free on the surface for about two months, and Frisk has a problem: They've been having nightmares every day for almost a week, and they’re getting worse. The source of the nightmares? Mount Ebott and a golden necklace they took from it.
For some reason or another, someone – or something – has latched onto them. Whatever it is, it’s angry, and more unhappy about the arrangement than Frisk could ever know.
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As Carol and the Knight's conspiracy slowly unfolds, their plans are intruded as unknown players find their way into the field..
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A Future Without Them by Baddrummer
Fandoms: Deltarune (Video Game), Undertale (Video Game)
20 Dec 2025
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Years pass. People grow. The world moves on without you. The Angel grew content with that for a while. It still hurt whenever they thought of the world that had long banished them, but something new pulled them out of the depths. Now, the Angel walks amongst friends who swear that they will not be banished. Kris, Susie, and Ralsei mean everything to them. Maybe this time, their banishment doesn't have to be as set in stone as they thought.
The Roaring comes. The light falters. Everyone falls.
A desperate connection is established in an attempt to save what remains of the Angel. If they fall, all hope will be lost. The world that banished the Angel long ago has forgotten them, but they have not forgotten it. This connection will have to be enough. Even if the rules have changed irrevocably, the Angel's one goal remains the same: Find them.
Series
- Part 3 of Clawing Toward What Hope Remains
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The Serif household has been through many odd scenarios. After all, they are entirely comprised of other versions of the same two skeletons who got stuck in the world they have called home for six years, unable to return to their worlds and thus forced to carve out a life for themselves until further notice. All things considered, they found their stride and adapted to the ongoing weirdness of universe hopping.
That is, until she arrived. Flora, a woman so out of left field and disrupting their normality, appeared in the basement, battered and bloodied to hell and back. Stuck like all the others who had appeared before her, the Serif household is forced to accommodate her until she stabilizes, slowly beginning to get to know the lackluster and stone-faced woman who ensures they don't injure themselves via stupid means.
Few expect her to open up. Fewer expect her to accept becoming friends.
None expect for any of them to become much, much more.
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Unavoidable Outcomes by Crystalight532
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game)
20 Dec 2025
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The Multiverse isn't as unreachable as one might think. Sometimes, all it takes is one aware person to tip the scales for another to find out about it. But when one isn't ready for it, returning to their own world is relieving and best for the psyche.
Humanity's thirst for knowledge is near insatiable. How far would they be willing to go to learn more about their new magical coinhabitants on the surface? How far would they go if they could weaponise their magic?
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The main cast of Undertale finally made it out of the Underground... But... something seems strange, especially to Frisk. Where is everyone? Where is humanity? How will the monsters be able to live on the surface? What is... going on?
A Vintage Story x Undertale Crossover
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Tenna was the royal entertainer. The Dreemurr's T.V who brought bright smiles to darkened faces
Spamton was a bestselling Journalist, a "genius coordinator" collecting human souls to reach the surface.Now, they were in the dumps of the Waterfall, discarded, broken, wrought with regrets. When Spamton pulls Tenna out of the trash, armless and half aware, two ends meet and begin again.+.
(How two morally dubious hotshots become a sweet old married couple in Undertale)
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Choose Your Fighter by FandomWorld9728
Fandoms: Undertale (Video Game), Mafiatale - Fandom, Mafiafell - Fandom, Mafiaswap - Fandom
20 Dec 2025
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When your life gets turned upside down, you move to a Monster run city to for a fresh start. Against your will, mind you. On your way to your new job, you get saved by some very interesting skeletons...
Series
- Part 18 of Undertales Across the Multiverse
- Part 12 of Sans/Reader Fics
- Part 13 of Papyrus/Reader Fics
- Part 8 of Reader Inserts
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There is heavy darkness weighing the teenage WingDings Gaster down in this Gothic world. Not only is something dreadfully wrong with him, the world itself is draped in a monotone and dreary tint that does its best to claw its way into everything. Can WingDings run to his soul in time or will his new troubles get to him first?
Series
- Part 15 of Shattered Soul Series
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The idol group Blushing bones is super famous and somehow miraculously you ended up dating one of the idols.
At least it feels miraculous at first, but the longer your with Blue, the more it feels like something is wrong.
Series
- Part 2 of Starstruck
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WingDings Gaster has finally made it into his teenage years, but this isn't making his quest to find the pieces of his soul any easier. This time he finds himself in ancient Babylon, manning a little shop to survive in the city. He knows where the piece of his missing soul is, but the trouble is getting to it without drawing unwanted attention . . .
Series
- Part 12 of Shattered Soul Series