chaesteria
- GELESEN 3,149
- Stimmen 252
- Teile 8
"What the hell...?"
The voice that cut through the white silence was sharp, deep, and dripping with un-friendly confusion.
(Name) jumped, her heart slamming against her ribs. She whirled around.
And screamed.
There, standing in the void as if he owned every atom of it, was Error. Not a hot drawing of a fanart. Not a pixelated sprite. Not even her deluded imagination. The real Error Sans, staring at her with an expression of pure, unadulterated contempt.
- wherein a fanfic author for the bad sanses gets sucked into their universe. the author is you.
Remember the times you joked about "dying for your fictional crushes"?
Well, one chronically online, strawberry patterned pajama-clad Bad Sanses fangirl actually did-courtesy of a pixelated meme dog and what might be the universe's worst case of writer's block. Now, she's stuck in the Undertale multiverse with nothing but her AU knowledge, a deeply unserious System guide named Selene, and the terrifying realization that her beloved skeletons don't blush on first meeting.
They try to murder her.
Armed with terrible skeleton puns, niche references, and a soul that might be powered by sheer cringe, her new mission is clear: befriend the murderous skeletons, grind enough EXP to not die (again), and somehow stop the multiverse from collapsing-all while convincing a glitchy skeleton that she's not the weirdest thing he's seen today. (She is.)
It's a self-insert isekai where the only thing stronger than Determination is a fangirl's ability to ignore red flags.
[ Hiraeth rewritten! The description seems silly but it's more serious than I made it seem HAHA! ]
Bad Sanses x F! Reader
Published: February 1, 2026