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1. Big Brother Blue (and maybe a little lewd, too!) by orphan_account

   Fandoms: Undertale (Video Game)  

   • Explicit
   • Creator Chose Not To Use Archive Warnings
   • M/M
   • Complete Work

   21 Mar 2018

   Tags

   • Creator Chose Not To Use Archive Warnings
   • Papyrus/Sans (Undertale)
   • Fontcest - Relationship
   • Sans (Undertale)
   • Papyrus (Undertale)
   • Underswap Sans
   • Underswap Papyrus
   • Alternate Universe - Underswap
   • Bara Blue
   • Bara Sans
   • Undertale Skeletons in Heat
   • Breeding Kink
   • Incest Kink
   • Post-Coital Cuddling
   • This wasnt supposed to be this lewd
   • Baby's first fuckfic
   • Dom blue
   • Sub Papyrus
   • Dom Sans
   • Undyne does squat diddly shit so she doesn't get a character tag
   • Rough Sex
   • Anal Sex
   • Knotting
   • minor food kink
   • Dirty Talk
   • Mild Humor
   • Swapcest - Freeform
   • Fondling
   • Praise Kink
   • Blow Jobs

   Summary

   After years of being called tiny, Underswap Sans is finally gifted with an incredible height.

   It's too bad he's too busy trying to fuck his brother to enjoy it.

   Series

   • Part 1 of What Comes After Thrice, Anyway?

   Language:

   English

   Words:

   7,353

   Chapters:

   2/2

   Comments:

   46

   Kudos:

   531

   Bookmarks:

   61

   Hits:

   14,466