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   Bad Decisions™ (aka: Sans fucks up and you have to deal with the consequences) by fundamentalerror

   Fandoms: Undertale (Video Game)  

   • Teen And Up Audiences
   • Creator Chose Not To Use Archive Warnings, Graphic Depictions Of Violence
   • Multi, Other
   • Work in Progress

   18 Apr 2026

   Tags

   • Creator Chose Not To Use Archive Warnings
   • Graphic Depictions Of Violence
   • Papyrus (Undertale)/Reader
   • Papyrus (Underswap)/Reader
   • Papyrus (underfell)/reader
   • Papyrus (Swapfell)/Reader
   • Papyrus (Fellswap gold)/Reader
   • Sans (Undertale)/Reader
   • Sans (Underswap)/Reader
   • Sans (Underfell)/Reader
   • Sans (Swapfell)/Reader
   • Sans (Fellswap gold)/Reader
   • Sans (Horrortale)/Reader
   • Papyrus (Horrortale)/Reader
   • Error (Aftertale)/Reader
   • Nightmare (Dreamtale)/Reader
   • Killer (Something New)/Reader
   • Dust (Dusttale)/Reader
   • Cross (XTale)/Reader
   • More To Be Added? IDK
   • Papyrus (UT)
   • Papyrus (US)
   • Papyrus (UF)
   • Papyrus (SF)
   • Papyrus (FSG)
   • Sans (UT)
   • Sans (US)
   • Sans (UF)
   • Sans (SF)
   • Sans (FSG)
   • Papyrus (HT)
   • Sans (HT)
   • Error (aftertale)
   • Nightmare (Dreamtale)
   • Dream (Dreamtale)
   • Killer (Something New)
   • Dust (Dusttale)
   • Cross (Xtale)
   • Ink (___tale)
   • Basically all the skeletons (and skeletors or smh idk)
   • spoilers in tags
   • NO SMUT JUST SO YOU DON'T HAVE TO BE SPOILED
   • ur welcome
   • you live in a fell timeline
   • yup that's right
   • ur snas and paps are fell bois
   • Sorry Not Sorry
   • this is my own little twist on like the six skeles one human
   • only different timeline
   • and you have like a billions skeles
   • congrats
   • i update like once in a while cuz galaxy brain
   • or do like 10 updates so don't be surprised
   • reader isn't a pushover just squishy :3
   • reader uses they/them
   • im dying
   • not really just internally lol
   • lets see how long it takes for me to develop the fanfic author curse
   • i mean i already did once
   • back in business baby and HOLY that’s a lotta tags

   Summary

   you live a cute little picturesque life with your skeleton boys, interrupted only by legal issues, racist cunts, raccoons, and sans fucking with his damn machine and bringing several alternate versions of himself and paps to your reality.

   it’s gonna be a skele-ton of problems from here on out.

   Language:

   English

   Words:

   7,325

   Chapters:

   6/?

   Comments:

   17

   Kudos:

   173

   Bookmarks:

   38

   Hits:

   3,033

   Bookmarked by Shronkuss

   17 May 2026