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1. Day 5: Cloning/Selfcest (Ink/Error) by Fynn_Lives_In_The_Void

   Fandoms: Undertale (Video Game)  

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

   05 Oct 2026

   Tags

   • Creator Chose Not To Use Archive Warnings
   • Sans/Sans (Undertale)
   • Error/Ink
   • Error Sans/Ink Sans
   • Error Sans
   • Ink Sans
   • undertale - Freeform
   • Undertale AU
   • Error Sans (Undertale)
   • _____tale Sans | Ink (Undertale)
   • Error Sans/_____tale Sans | Ink (Undertale)
   • Closet Sex
   • Skeleton Sex (Undertale)
   • Fresh Sans (Undertale)
   • Kinktober
   • Kinktober 2026
   • Selfcest

   Summary

   Writing this took me WAY back.

   Series

   • Part 5 of Fynn's 2026 Kinktober Bin

   Language:

   English

   Words:

   599

   Chapters:

   1/1

   Comments:

   4

   Kudos:

   21

   Bookmarks:

   3

   Hits:

   319