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1. The Other One by Justiisleepy (Juxtiisl33py)

   Fandoms: Death Note (Anime & Manga), Death Note: The Musical - Wildhorn/Murphy, Death Note (Live Action TV), Death Note (Movies), Death Note (2017)  

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

   07 Jan 2026

   Tags

   • Graphic Depictions Of Violence
   • Major Character Death
   • L (Death Note)/Original Male Character(s)
   • Original Male Character(s)/Original Male Character(s)
   • Original Yagami Character(s) (Death Note)
   • Yagami Light
   • Yagami Sayu
   • Yagami Souichirou
   • Yagami Sachiko
   • Yagami Family (Death Note)
   • L (Death Note)
   • Watari | Quillsh Wammy
   • Aizawa Shuuichi
   • Matsuda Touta
   • Mogi Kanzou
   • Amane Misa
   • Ryuk (Death Note)
   • Rem (Death Note)
   • Takada Kiyomi
   • Kira Task Force
   • Kira (Death Note)
   • The Kira Case (Death Note)
   • Alive L (Death Note)
   • Alternate Universe- Light is a twin (Death Note)
   • Original Character(s)
   • Major Original Character(s)
   • Twin Original Character
   • L Lawliet - Freeform
   • Yagami Light is Kira
   • no beta we die like men
   • Not Canon Compliant
   • Trauma
   • Misunderstandings
   • L is a Little Shit (Death Note)
   • Angst
   • Fear
   • Developing Relationship
   • Implied/Referenced Child Abuse
   • Implied/Referenced Homophobia
   • Grief/Mourning
   • Suicidal Thoughts
   • Murder
   • Self Harm
   • Eventual Romance
   • Internalized Homophobia
   • Slow Burn
   • Self-Esteem Issues
   • Dysfunctional Family
   • Complicated Relationships
   • POV Multiple
   • Late Night Conversations
   • Bickering
   • Loneliness
   • age gap
   • OC is 18 at start
   • L is 22/23 at start
   • Unfortunate Sachiko Yagami slander
   • Canonical Character Death
   • Main character plot armor
   • Least favorite child syndrome
   • Disclaimer this was uploaded on wattpad as an x reader
   • I’m not letting this die (yet)
   • Work In Progress
   • Implied/Referenced Sex
   • Implied/Referenced Cheating
   • Friends With Benefits
   • Implied Relationships
   • Relationship of Convenience
   • Past Suicide Attempts

   Summary

   Seiji was deemed the "other twin" by everyone, he simply didn’t have as much potential as his younger brother. But who could blame them? Light was an all-A honor student, and Seiji was a middle-of-the-road daydreamer. But not everything is as it seems.
   While everyone is preoccupied with Light being the picture perfect son. Seiji spent his time engrossed in cold cases even getting justice for many families who had given up hope long ago.
   Fast forward to now— part of it is his own doing— his curiosity got the better of him. So now, Seiji finds himself tangled up in the Kira investigation. It seems the more he discovers, the closer the whole Kira thing feels.

   While finding his footing in the shadows of the Kira investigation, he gains an interest in a certain sugar-addicted detective, and has to learn how to navigate his role as a behavioral analyst with the spotlight on his twin brother…

   Language:

   English

   Words:

   10,666

   Chapters:

   2/17

   Kudos:

   9

   Bookmarks:

   2

   Hits:

   91