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Flowered Vines Grow on the Memory of the Arch of a Swing-set by yastaghr
Fandoms: Undertale (Video Game)
05 Jul 2026
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Summary
One childhood promise leads to changes that will ripple through the lives of more than just the three skeletons who shared it. When it comes into the spotlight, the result is a wave of change that will effect lives, families, and even an entire web of nations. Will the luck behind it bring good or bad to the people at the center of it all? Will Blue, Dream, and Nightmare find the love, peace, and safety they so desperately need? What is most important of it all, though, is whether anyone will ever help Blue find the rest of his mother's last gift.
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This takes place in a post Underfell King Papyrus ending.
Struck by under population, King Papyrus makes it law that all monsters left alive by the murderous little human have to procreate. This leaves Fell!Sans and The King himself in a tight spot. There are no female skeletons left in the whole Underground and both skeletons are sure they are the last of their species. Fell!Sans proposes something. With the help of the first Royal Scientist's machine to travel to other universes, he will find mates for breeding purposes.
Tale!Sans is having his first sub heat as a female. This happens when there are only males left and the strongest one undergoes a gender swap. He knows this means Papyrus will have to be his mate.
That won't do. They are brothers, for the Angel's sake! So he does what he does best, HE RUNS.
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Stretch (US!Papyrus) and Mutt (FS!Papyrus) remember their friend saying he'd like to try being submissive. He's too stuck in his ways to ever do it, though, so they take matters into their own hands.
Red (UF!Sans) gets tied up against his will.
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Sequel to "Star Catcher" (though not strictly necessary to read), Swapfell Sans copes with past events and a new pregnancy.
Featuring babies, adoptive babies, bad skeletons, good skeletons, bad monsters, good monsters, bad humans, violence, fluff, smut, Royal politics, weird tree stuff, boots and amazing tits.
Story handles sensitive themes, taken to extremes.
PART ONE - Cataclysm [1-38]
PART TWO - Consequences [39-66]
PART THREE - Climax [67-85]
PART FOUR - Conclusion [86-End]Series
- Part 2 of Star Catcher
- Part 3 of Swapfell Sans OC stories
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When the people started becoming monsters, Qiunn wasn't surprised. She had been waiting to meat them for years. She just wished they wouldn't keep her waiting.
You know how this gose, Monsters surfacing makes humans become mimics. MC needs help but the font clan already has a mimic to look after.
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Edge and Red go to pick up Papyrus and Sans to stay with them while Grillby is on vacation.
Series
- Part 5 of Sanses are good bois AU
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“Fuck you and fuck your mom and fuck your recovery,” the other sans snaps, coming to a halt only a few paces away with his face twisted towards Sans where he’s perched at the foot of the bed.
His eyelights are practically pulsating, molten hot pink with rage. Nonsensically, Sans registers that it’s a really pretty color. “Were you even listening to me, you little nutjob? I killed Gaster to protect my brother. Now riddle me this, asshole: why would your brother, the laziest fuck in the Underground, plot and execute a whole entire murder with a girl he barely knows?”
(Act Two, or: Blue goes on a road trip across time and space to salvage what’s left of Edge.
the direct sequel to ‘little blue pills’ and dealing with the events in ‘everyone learns faster on fire’
Off hiatus as of 2026)
Series
- Part 3 of goddamn, we missed the vein
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It's well past midnight, and Sans still hasn't contacted him. Papyrus, while searching every nook and cranny in Snowdin, makes another call, his phone rings once, twice, thrice… and nobody picks up. Just what in God's name could possibly be holding up his brother tonight, and why didn't he bother to tell him anything about it, after he had explicitly promised to…?
Then, to his surprise, a familiar golden corolla appears in front of him — but not for the reasons he'd hope.
"Papyrus! Hurry! Your brother's in big trouble!"
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Science tenía planes muy distintos para su vida. Con el mejor promedio, soñaba con laboratorios, investigaciones y proyectos científicos ... Lo que no esperaba era terminar trabajando como bailarín en un club nocturno administrado por la mafia.
Entre ensayos, nuevas amistades y un grupo de personas tan extrañas como acogedoras, Science descubrirá que algunos caminos inesperados pueden llevarte exactamente al lugar donde necesitas estar.
Aunque al principio no lo parezca.- Language:
- Español
- Words:
- 1,110
- Chapters:
- 1/?
- Hits:
- 18
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Summary
With everything they have been together for the last few weeks, Nightmare agrees to let Luna and Honey go out to get supplies for the growing number of residents within the Castle.
Who could have known the dimension the deity sends them to is one that will have past lives clashing and major secrets finally revealed.
Series
- Part 5 of Kaleidoscope
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Collection of dark fontcest doodles (Papyrus centric)
W.D. Gaster is the father of Sans and Papyrus. -
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I have a bin of colorful balls with prompt stuff in them and pick from the ball pit to do warmups! This is where I post them
Yellow-writing prompt
Orange-Undertale AU
Green-Song
Blue-Something extra
Purple-Ship
Pink-Character(s) -
this is the beginning by freshywritescrap (freshiewrites) for Alennyah
Fandoms: Undertale (Video Game)
05 Jun 2026
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Summary
(of the rest of your life)
Papyrus has been watching Sans, feeling so pleased now that they're on the Surface and his brother has access to the stars that seem to enchant him. Maybe he can do something to show Sans how special he is to him...
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Mettaton’s rise to fame on the surface was much harder than he’d thought. The surface was much different to what he expected. Though not all the problems Mettaton was faced with originated from the surface…
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Your contractual marriage with Gaster was supposed to stay professional.
Then somehow, over the course of ten years, you accidentally became more emotionally attached to his sons than expected.
Unfortunately for everyone involved, you were serious about the custody battle.
Series
- Part 2 of OneShot Shenanigans
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It's been four months since the whole world tilted and spun out under Sans, dropping him into the snow in front of a very tall skeleton.
Four months, as it turns out, is a very long time.
Series
- Part 2 of no way off the hamster wheel
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You are…well…you’re not sure who you are. You must’ve hit your head pretty hard. It’s a good thing these nuns are here to nurse you back to health. Most of them are total sweethearts— cooking and cleaning for you, wearing cute little maid outfits, serving you with a smile. The others wouldn’t be caught dead with a feather duster in their hands and become your tutors. They love to tease and are very unsubtle about wanting to sleep with you. You may not remember much, but aren’t nuns supposed to be celibate? And uh, not skeletons?
These sisters have a secret. As the moon waxes full so does their feral horniness and nowhere is safe.
(A silly, smutty story set in a world wherein all characters are female, all skeletons are also magical girls, and ‘that time of the month’ means transforming into whatever kind of skele-monster the author most recently has the hots for)
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Sans finds out the hard way what really happens during a reset. And he's already seen it before.
This is very short, but feel free to steal the concept.
- Language:
- English
- Words:
- 306
- Chapters:
- 1/1
- Kudos:
- 7
- Hits:
- 77
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Read the labels first to find out the content.
Do you like Undertale or the different Sans that exist? Well, here you'll find some of the aberrations I write. My main inspiration is music.
Feel free to make requests, with music and details, absolutely everything is accepted.
Everything and without restrictions. :D
Series
- Part 1 of Let me turn the plate over.
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Red has been insufferable lately, shamelessly ignoring Edge's attempts at being a normal family. On one hand, the tense silence between them is helpful: Red won't notice the petals Edge keeps coughing when thinking about his brother in a certain way.
On the other hand, it's killing Edge inside. One petal at a time.