1 - 20 of 4,154 Works in Post-Undertale Pacifist Route
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Summary
You're a grad student at a house party. How many skeletons are you running into there? At least one you didn't expect.
(This explains nothing. Please read if you like Sans/Reader romance slice of life with plot, character relationships, fluff and eventual smut. Underfell headcannon is being used.)
(Time for a second note to reemphasize PLOT. Drowning in plot. Plot for days. Send help.)
(None of this is really about college.)
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Summary
Anti error leaves the anti void for the first time
Frisk is misses their friend
Shit happens
(Some things in the tags may not have happened yet)
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How to Build a Brand (UT/DR/UTY) by tealsnicker
Fandoms: Undertale (Video Game), Deltarune (Video Game)
17 Feb 2026
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* You found an odd journal on the ground. It seems well-used, and there are sticky-notes and tabs poking out from every corner, tacked onto almost every page.
* Its colour is pretty faded, but once upon a time it must have been a bright, cheery pink. You can just tell—it’s the vibe it has.
* Now, it would be rude to snoop and take a look at what was written inside, since this isn’t your journal, but…
* Well, it looks like whoever owned it left it here a long time ago, or else they would have come back for it by now, so…
* Read it?
* ...
* Just one little peek wouldn’t hurt…
(A silly self-indulgent AU about Mettaton [and others] making it big on the surface post-pacifist ending, but the story is told through the eyes of Lucy, the protag, while she struggles to find her own path on the surface despite having lived there her whole life, unlike Mettaton. Has DR/UT/UTY characters combined into one UT scenario lol. I kinda write it for fun and for myself, but... As that text post goes: "You can read it too, I guess.")
- Language:
- English
- Words:
- 120,953
- Chapters:
- 16/?
- Hits:
- 52
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Summary
You're an engineer who works for Ebott's best research facility in one of the labs; your lifelong dream after finding a journal on Mount Ebott when you were a kid. When you aren't in the lab being smart, you're gathering materials at the abandoned doll factory for the machine you're trying to build.
But one night, you meet a skeleton at the factory. Naturally, you lie about why you're there and say you're there to hunt ghosts. You befriend him and try to find a way to gather the materials while keeping up with that lie. But those lies catch up to you when you start to meet all the other skeletons.
Edit: As of Chapter 29, all chapters have been edited and fixed slightly!
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One day, the severe bullying Frisk has to endure is just too much.
As Frisk's body gives up and she passes out in the hallway, a skeleton teleports just in time to witness the fall.
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It has been five years since monsterkind left Mount Ebott with the help of Frisk. Now a teenager, that’s six months they had been living far from their people with Toriel, who got hired as the first teacher for humans and monsters. Frisk lives that forced exile badly, but summer vacations are close enough to go back to New New Home and see all those they left behind.
Soon enough, Frisk realizes something is wrong with Sans. Despite the forced smiles, the skeleton is suffering in silence. Worried, Frisk decides to investigate. Is he still mad for all these timelines they did something irredeemable, or is it something deeper?
One thing is for sure, those vacations won’t be like the others.
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Bad Night by cptsubby
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game)
15 Feb 2026
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Frisk is plagued by their rather poor memories of Flowey in the middle of the night. They sneak out, fully expecting to get some fresh air alone. What they didn't expect, however, was for their friends to show up for them.
- Language:
- English
- Words:
- 4,102
- Chapters:
- 1/1
- Kudos:
- 2
- Hits:
- 43
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Summary
Hope can be a difficult thing in the face of adversity. Hope can be painful.
For some, it's easier to let go of the pain of what could be different and focus on the wall of pain that is. For others, hope is needed to hold back the landslide behind a fragile wall, so they can keep moving forward and make that hope into the reality they want to see.
A very vague summary to avoid spoilers, because this is a continuation of a large cliffhanger in this series. Summary might change as I post more.
**This is NOT a stand-alone fic and can't be read as such!**
Series
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A Future Without Them by Baddrummer
Fandoms: Deltarune (Video Game), Undertale (Video Game)
15 Feb 2026
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Summary
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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Summary
You'd never been fond of hookup culture. Too often, you find yourself attached and hoping for more only to be met with an empty inbox. Or worse, being blocked.
Not to mention the amount of dudes that turn out to be... gross, for lack of better word.
Yet here you were, backstage pinned to the glittery pink walls of a certain famous robot superstar.
♡
happy valentines day i still wanna fuck robots
- Language:
- English
- Words:
- 2,183
- Chapters:
- 1/1
- Kudos:
- 7
- Hits:
- 83
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Ever since you started actually dating, several weeks ago, the moments had become infuriatingly, intoxicatingly more intense. Like when he spilled juice all over his shirt and, neat freak that he was, stripped the whole sticky mess off while he was still standing in his kitchen, back flexing and scapula moving as he pulled the damn thing up and over his head. Or when you would climb into his lap and kiss him and he would just barely whimper, hands clutching your hips and face turning bright pink. Or when he discovered what tickling was as he lifted you by the sides to see further into the tank at the aquarium, and was so enamored by this 'HUMAN LAUGHTER BUTTON,' that soon he had you pushed up against the glass, hands under your shirt, laughing until you were panting, a burning want building in your guts. A security guard had to warn you both to move along. It was driving you crazy. You still knew you were not going to get anywhere without communicating directly.
Series
- Part 1 of Papyrus fics
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Waking Up // The Vessel AU by Sailor_Cinna
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game)
14 Feb 2026
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Summary
It’s them.
It’s not them.
“Chara?”
Chara thinks. Clover would get mad if they said they didn’t like it, right? That was rude, it- it was rude. But it just felt so wrong to exist right now. They attempt to stand- sort of expecting to fall over. But they don’t. Clover rushes over.
“Is- is somethin’ wrong, Chara?”
Yes.
“No.”
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My addition to the Cocoapowder Valentine's 2026 event!!! The prompt was 'The Beginning', so I decided to post about the beginning of my AU's timeline! This is when Chara first wakes up after their body is completed. Expect more on this AU in the future!Series
- Part 1 of The Vessel AU
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You're an office worker living in Ebott, one of few humans who had decided to stay after the monsters emerged a year prior. When asked why on earth you didn't hightail it out of there, you'd say that you, for one, welcomed our new monster overlords.
But despite the jokes, deep down you were excited at the prospects of an entirely new and fantastical species, plain and simple.
One unlucky day as you're caught in the rain with only a bar to seek refuge in, you get introduced to the monsters within: one of which has definitely caught your eye
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It's not a fairytale. Relationship of Sans and Frisk has its ups and down but they wish each other well and choose each other day by day.
- Language:
- English
- Words:
- 1,390
- Chapters:
- 1/1
- Kudos:
- 3
- Hits:
- 30
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Summary
You were just walking home. A tear in reality split open underneath your feet and suddenly you were falling.
Falling
FallingThen you fell up and onto the tiled floor of a basement lab.
Now all of a sudden you're in another world and surrounded by 6 strange skeletons (plus one's brother).
Being terrified of all things horror and monsters, what are you to do?*Will contain mature themes but no smut*
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15 years to the day since your younger sibling, Chara, disappeared. 1 month since monsters emerged from Mt. Ebott. You are paid a visit by a strange child bearing a striking resemblance to Chara.
- Language:
- English
- Words:
- 1,319
- Chapters:
- 1/1
- Kudos:
- 1
- Hits:
- 10
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Unavoidable Outcomes by Crystalight532
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game)
13 Feb 2026
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Summary
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?
'Creation, Destruction, Positivity, Negativity, Chaos, Peace, Possibility and Finality
The elements of the multiverse. All are necessary for it to function as intended.
All the pieces, all the gears, all turning as they should.'
OR:
Sans briefly encounters the Multiverse (I swear it will be relevant later) then gets thrown back into his world where humans have gotten curious and power hungry in regards to monster magic.
Series
- Part 1 of Gears Of The Multiverse
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Summary
lets make it quick
You're a mage, one of the 7 great mages. You and the 6 other mages helped your kind during the war, and you all won. You trapped the monster inside the mountain of E-bott. After the war, everything was perfect, peace everywhere, and the mages ruled the world. But something bad happened, and all of a sudden, you were the only one to survive; the other 6... they died, or at least 5 of them. One of them was never heard from again.Being immortal and being hated by your own kind, what a hellish life, isn't it?
Hiding away from society for decades, until finally, the time comes and you return to society to be a normal human being.
But you're not a normal human, so you need to change your appearance to look older and older over the years.
Then you fake your death
and change your appearance again to become yourself… then repeat.
You decide to open an orphanage to cure your loneliness, and it works! And then you start a business.
Over the years, you become one of the richest women in history.
Everything was perfect
and then fate seems to like you too much and starts saying, "Hey, let's break the barrier and give this mage some life!"good luck!
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Summary
You are suuuper obsessed with Galaxy and its thing, especially the universe! You spend over Years building a machine and another over years to make it perfect, night and day, even when you're sick, you still do the things you love.
You close your eyes and ears to the people who call you crazy, calling you mad, insulting your creation, Etc. Etc.
But who are they to stop you anyway??And dear god, after years of tears, blood, and mind... the MACHINE IS PERFECT! At least that was what you thought.
You get sucked by your own creation when you try to make coordination and testing on it, and now you're here.. with a skeleton.. oh my god
It's wonderful! YOUR MACHINE IS WORKING! HAH! You can't wait to slap the mouth that calls your creation useless by this INVENTION~
Well, after you successfully back to your own universe, survive on this world, well, you're gonna get help from the skeletons infront of you... right?
And then you can ask a few questions about this universe, hopefully he wants to answer them... he will... You're going to make sure he gonna help you, if it means begging.
Alright... here we go.
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Summary
Day 13: Why are you so handsome?
Series
- Part 12 of Femslash February 2026