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1. Who Said The Son Of Kindness Had To Be Kind? by azaleo

   Fandoms: Undertale (Video Game)  

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

   05 Dec 2025

   Tags

   • Graphic Depictions Of Violence
   • Nightmare/Error
   • Dream & Nightmare (Undertale)
   • Toxic Killermare
   • Platonic Fluffynight (possibly)
   • Nightmare Sans
   • Error Sans
   • passive nightmare sans
   • Dream Sans
   • Killer Sans - Character
   • Dust Sans
   • horror sans
   • Cross sans
   • Ccino sans
   • Dreamtale Nightmare Sans (Undertale)
   • Passive Dreamtale Nightmare Sans (Undertale)
   • Protective Dreamtale Nightmare Sans (Undertale)
   • Abusive Nightmare Sans (Undertale)
   • Healing
   • Found Family
   • He is a jerk BUT HE GETS BETTER
   • I promise he gets a character arc
   • Redemption
   • Bad Sanses | Nightmare's Gang (Undertale)
   • Bad Sanses | Nightmare's Gang As Family (Undertale)
   • Something New Sans | Killer Has ADHD (Undertale)
   • Abusive Relationships
   • Implied/Referenced Self-Harm
   • Sadism
   • Masochism
   • Animal Abuse
   • Post-Traumatic Stress Disorder - PTSD
   • Trauma
   • Depression
   • Power Imbalance
   • Toxic biiiiiitch!
   • Something New Sans | Killer Needs A Hug (Undertale)
   • Something New Sans | Killer Being a Little Shit (Undertale)
   • MAY BE TRIGGERING FOR PEOPLE WHO HAVE BEEN IN ABUSIVE SITUATIONS

   Summary

   Warning: Heavy sadism, abuse, manipulation, trauma and self harm topics.

   Nightmare is living the life. He's got a castle, power, whatever he wants when he wants it. Even if he's got a little ghostly stalker following him.

   Unfortunately, his enemies are teaming up, and he can't do everything alone anymore.

   Language:

   English

   Words:

   5,390

   Chapters:

   6/?

   Comments:

   21

   Kudos:

   47

   Bookmarks:

   7

   Hits:

   833