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1. Threading the Needle by ArShrum

   Fandoms: Undertale (Video Game)  

   • Mature
   • Graphic Depictions Of Violence
   • M/M
   • Work in Progress

   04 Jan 2026

   Tags

   • Graphic Depictions Of Violence
   • Cross/Killer
   • Cross & Nightmare
   • Killer & Nightmare
   • Horror/Dust
   • Cross & Horror
   • Cross & Dust
   • Cross sans
   • Killer Sans - Character
   • Nightmare Sans
   • horror sans
   • Dust Sans
   • XChara
   • Underswap Sans - Character
   • Dream Sans
   • kross - Freeform
   • crossmare(unrequited)
   • Unrequited Love
   • Alternate Universe - Modern Setting
   • Alternate Universe - Soulmates
   • Toxic Yaoi
   • Sexual Tension
   • copious amounts of it actually
   • Unresolved Sexual Tension
   • Killer is His Own Warning
   • Unhealthy Relationships
   • Unhealthy Coping Mechanisms
   • Post-Traumatic Stress Disorder - PTSD
   • Angst and Hurt/Comfort
   • killer is delighted by the situation
   • cross is Not
   • they're both huge assholes
   • nightmare might be less of an asshole
   • horror and dust are not assholes
   • horrordust(background)
   • Injury Recovery
   • Red String of Fate
   • No Smut
   • Suggestive Themes
   • Additional Warnings In Author's Note
   • Other Additional Tags to Be Added
   • Killer Sans/XTale Sans | Cross (Undertale)

   Summary

   Following an attack that revealed an elaborate plot to end his life and left him severely injured, Cross is forced to not only stop being Nightmare's bodyguard, but accept a bodyguard of his own. Nightmare insists that he'll need the protection while he lays low and waits for the situation to get resolved, but Cross isn't so sure. Even though he's decided to put up with it for Nightmare's sake, he is not happy about it.

   The only thing that could possibly make this worse was if, by some insane turn of fate, his new bodyguard just so happened to be his soulmate.

   ~-~
   updates whenever possible :)

   Language:

   English

   Words:

   36,623

   Chapters:

   16/?

   Comments:

   101

   Kudos:

   262

   Bookmarks:

   36

   Hits:

   5,435