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. Singularity (Partial Hiatus) by TheIntellectualWeeb

   Fandoms: Naruto, Fullmetal Alchemist (Anime 2003)  

   • Mature
   • Graphic Depictions Of Violence, Major Character Death
   • M/M
   • Work in Progress

   16 Jun 2026

   Tags

   • Graphic Depictions Of Violence
   • Major Character Death
   • Uchiha Madara/Male Reader
   • Male Reader/Various
   • Uchiha Madara/Original Male Character(s)
   • Original Male Character/Various
   • Uchiha Madara
   • Original Characters
   • Male Reader
   • Hatake Sakumo
   • Hatake Kakashi
   • Nohara Rin
   • Alternate Universe
   • Crossover
   • Alpha/Beta/Omega Dynamics
   • Omegaverse
   • world building
   • Lots of OCs - Freeform
   • lots of canon characters
   • Angst
   • Fluff
   • I'll break your heart
   • but don't worry
   • I'll fix it
   • Slow Burn
   • I mean VERY slow burn
   • lots of pining
   • I'll add more tags as I need them
   • and as I introduce characters
   • Historical AU
   • Reincarnation AU
   • Reader Insert
   • alpha male reader
   • Action/Adventure
   • Eventual Romance
   • Loneliness
   • Insecurities
   • Self-Acceptance
   • Hurt/Comfort
   • honestly i write this to help me manage my stress
   • it's helping to keep me sane
   • Cross-Posted on Quotev
   • i originally was going to write this with my oc
   • but idk i figured more people could enjoy it as an insert
   • Don't copy to another site

   Summary

   Fullmetal Alchemist/Naruto Omegaverse AU Crossover.

   Uchiha Madara x Alchemist!Male Reader x Slight Various.

   You were convinced he was a singularity of this world. Although... he could say the same about you.

   Language:

   English

   Words:

   51,689

   Chapters:

   19/?

   Collections:

   1

   Comments:

   57

   Kudos:

   305

   Bookmarks:

   46

   Hits:

   7,595