Adult Content Warning

This work could have adult content. If you continue, you have agreed that you are willing to see such content.

• Yes, Continue
• No, Go Back

If you accept cookies from our site and you choose "Yes, Continue", you will not be asked again during this session (that is, until you close your browser). If you log in you can store your preference and never be asked again.

1. ~Sick Of You~ Killer Sans X Reader by T4K31T2MYGR4V3

   Fandoms: Undertale (Video Game)  

   • Mature
   • Graphic Depictions Of Violence, Rape/Non-Con
   • F/M
   • Work in Progress

   27 Oct 2025

   Tags

   • Graphic Depictions Of Violence
   • Rape/Non-Con
   • Sans (Undertale)/Reader
   • Killer Sans/Reader
   • Cross
   • Horror - Character
   • Killer Sans - Character
   • Sans (Undertale)
   • Dust
   • killer/reader - Freeform
   • Nightmare Gang - Freeform
   • sans/reader - Freeform
   • Bad Sanses | Nightmare's Gang (Undertale)
   • Soul Bond
   • Attempted Rape/Non-Con
   • Kidnapping
   • How Do I Tag
   • Possible smut
   • idk yet
   • I Suck At Writing Smut
   • soulmate
   • a lot of fight scenes
   • Slow Burn
   • Killer Sans (Undertale)
   • Horrortale Sans (Undertale)
   • Dusttale Sans (Undertale)
   • Xtale Sans | Cross (Undertale)
   • Star Sanses (Undertale)
   • cross needs a hug
   • Mental Health Issues
   • idk what to add
   • sexual tension is real
   • Possessive Sans (Undertale)
   • Yandere Killer sans??
   • Mostly writing this because i have writers block on my other story i'm so sorry
   • Constructive Criticism Welcome
   • Killer is Russian
   • like really slow burn

   Summary

   “YOU LOST IT?!”. Were the three words that echoed through the throne room, shaking the large ebony pillars that lined the walls. “WHAT DO YOU MEAN YOU LOST IT?!” “Well if Cross ha-”. “I don't care who’s fault it was, this was the easiest mission I have EVER tasked you three with!” A heavy grunt escapes Nightmare as he sinks into his seat. Pinching his nasal ridge. His tentacles dripped and swayed furiously. “Cross, seeing as you were the one leading this mission, do you care to explain what happened?”

   Cross steps forward and bows down before the big throne. “Well, uhm, you see…”

   Language:

   English

   Words:

   15,515

   Chapters:

   5/?

   Comments:

   8

   Kudos:

   74

   Bookmarks:

   12

   Hits:

   1,590