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1. The Trials and Tribulations of Fucking Your Math Teacher Who is Also Your Brother by GALDORIAL

   Fandoms: 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Manga), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime)  

   • Explicit
   • Graphic Depictions Of Violence, Rape/Non-Con, Underage Sex
   • M/M
   • Work in Progress

   18 Sep 2025

   Tags

   • Graphic Depictions Of Violence
   • Rape/Non-Con
   • Underage Sex
   • Shinazugawa Genya/Shinazugawa Sanemi
   • Assorted Past Relationships
   • like a lot of them - Relationship
   • Daki | Ume/Gyutaro (Kimetsu no Yaiba)
   • canon relationships mentioned
   • Shinazugawa Sanemi
   • Shinazugawa Genya
   • Shinazugawa Family (Kimetsu no Yaiba)
   • Kochou Kanae
   • Kamado Tanjirou
   • Agatsuma Zenitsu
   • Daki | Ume (Kimetsu no Yaiba)
   • Gyutaro (Kimetsu no Yaiba)
   • Uzui Tengen
   • Alternate Universe - Kimetsu Gakuen (Kimetsu no Yaiba)
   • Brother/Brother Incest
   • Teacher-Student Relationship
   • Established Relationship
   • Explicit Sexual Content
   • Past Child Abuse
   • Jealousy
   • Fluff and Angst
   • Smut
   • Additional Warnings In Author's Note
   • Public Sex
   • Implied/Referenced Abortion
   • 5 Year Age-Gap
   • Drunk Sex
   • Past Character Death
   • Self-Harm

   Summary

   Genya has heard after a few years the passion in a relationship should die, the honeymoon phase should end. So why is it that pretending hurts so bad? How come every day that passes makes the careful space between them hurt that much worse?

   Two brothers - who shouldn't be dating at all - work within their relationship to better it, no matter how difficult that seems.

   Language:

   English

   Words:

   129,426

   Chapters:

   10/?

   Comments:

   182

   Kudos:

   463

   Bookmarks:

   52

   Hits:

   13,476