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. The Prince Wears Purple by Riss909

   Fandoms: Undertale (Video Game)  

   • Not Rated
   • Creator Chose Not To Use Archive Warnings, Graphic Depictions Of Violence
   • Gen, M/M, Multi
   • Work in Progress

   06 Oct 2025

   Tags

   • Creator Chose Not To Use Archive Warnings
   • Graphic Depictions Of Violence
   • Sans/Sans (Undertale)
   • Nightmare Gang/Sans (Undertale)
   • Sans (Undertale)
   • Nightmare Gang (Undertale)
   • Brothers
   • Brotherly Affection
   • Polyamory
   • Polyamorous Character
   • Killer Sans (Undertale)
   • Xtale Sans | Cross (Undertale)
   • Dreamtale Nightmare Sans (Undertale)
   • Passive Dreamtale Nightmare Sans (Undertale)
   • _____tale Sans | Ink (Undertale)
   • Error Sans (Undertale)
   • Developing Relationship

   Summary

   Nightmare didn’t pay Killer to be nosy, but then again Nightmare didn’t pay Killer at all.

   Besides, Killer never really knew when to quit. After a nasty fight with Cross, Killer gets lost in his frustrations and ends up in a part of Nightmare’s castle he’s never been to before.

   The deeper he goes the colder it gets, and the darker it gets. The light he finds at the end of this tunnel seems more like someone's prison than a way out.

   Language:

   English

   Words:

   31,784

   Chapters:

   8/?

   Comments:

   61

   Kudos:

   231

   Bookmarks:

   47

   Hits:

   3,534