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1. Red Cinders by Alennyah, RoseDarkfire

   Fandoms: Undertale (Video Game)  

   • Explicit
   • Creator Chose Not To Use Archive Warnings
   • F/M, M/M, Multi
   • Work in Progress

   16 Feb 2026

   Tags

   • Creator Chose Not To Use Archive Warnings
   • Sans/Sans (Undertale)
   • Papyrus/Sans (Undertale)
   • Sans (Undertale)/Original Character(s)
   • Papyrus (Undertale)/Original Character(s)
   • Bad Sanses | Nightmare's Gang (Undertale)
   • Dreamtale Nightmare Sans (Undertale)
   • Horrortale Sans (Undertale)
   • Xtale Sans | Cross (Undertale)
   • Underswap Sans (Undertale)
   • Dusttale Sans (Undertale)
   • Swapfell Sans (Undertale)
   • Original Character(s)
   • Underswap Papyrus (Undertale)
   • Swapfell Papyrus (Undertale)
   • Character Death
   • Other Additional Tags to Be Added
   • Mpreg | Male Pregnancy
   • Mafiafell Sans (Undertale)
   • Mafiafell Papyrus (Undertale)
   • reunited

   Summary

   With everything they have been together for the last few weeks, Nightmare agrees to let Luna and Honey go out to get supplies for the growing number of residents within the Castle.

   Who could have known the dimension the deity sends them to is one that will have past lives clashing and major secrets finally revealed.

   Series

   • Part 5 of Kaleidoscope

   Language:

   English

   Words:

   17,559

   Chapters:

   8/19

   Comments:

   5

   Kudos:

   13

   Hits:

   237