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   Monsters Don't Do Background Checks by saltedpeppermintmocha

   Fandoms: Undertale (Video Game)  

   • Explicit
   • No Archive Warnings Apply
   • F/F, F/M, M/M
   • Work in Progress

   16 May 2026

   Tags

   • No Archive Warnings Apply
   • Sans (Undertale)/Reader
   • Burgerpants/Nice Cream Vendor (Undertale)
   • Alphys/Undyne (Undertale)
   • Other Relationship Tags to Be Added
   • Sans (Undertale)
   • Other Undertale Characters
   • Alternate Universe - Underfell (Undertale)
   • Underfell Sans (Undertale)
   • Enemies to Lovers
   • Eventual Romance
   • Fluff
   • Smut
   • Sans is kinda an asshole
   • but thats okay so is Reader
   • reader is female
   • Teasing
   • Mutual Pining
   • Swearing
   • Smoking
   • Drinking
   • All sorts of debauchery
   • Bara Underfell Sans (Undertale)
   • Plot
   • Speciesism
   • The Monster fight for Basic Rights
   • Slow Burn
   • Friendship
   • Idiots in Love
   • Past Abuse
   • Ecto-Genitalia (Undertale)
   • Some scary moments
   • Domestic Fluff
   • Many more smut scenes than I originally thought but here we are lol

   Summary

   Moving across the country and starting your life anew on the basis of a rumor may not be the smartest thing you've ever done...but, well, you're here.

   If only you could stop running into that asshole skeleton, life would be pretty good.

   Language:

   English

   Words:

   154,549

   Chapters:

   22/?

   Comments:

   822

   Kudos:

   1,031

   Bookmarks:

   209

   Hits:

   26,886

   Bookmarked by Elk08

   17 May 2026