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1. My Heart was Always Yours by Marshmallow_Warrior

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

   • Explicit
   • No Archive Warnings Apply
   • M/M
   • Work in Progress

   15 Jun 2026

   Tags

   • No Archive Warnings Apply
   • Shinazugawa Sanemi/Tomioka Giyuu
   • Shinazugawa Sanemi
   • Tomioka Giyuu
   • Shinazugawa Family (Kimetsu no Yaiba)
   • Tomioka Tsutako
   • Tomioka Tsutako's Fiancé
   • Childhood Friends to Lovers
   • slight age gap
   • No love/smut until they are both adults!
   • kyogo is a piece of shit
   • Child Abuse
   • Domestic Violence
   • hints at sexual assault - no descriptions
   • Shinazugawa Sanemi is Whipped
   • Oblivious Tomioka Giyuu
   • Protective Shinazugawa Sanemi
   • Shinazugawa Sanemi is a Good Older Sibling
   • Protective Tomioka Giyuu
   • Will add more as I go
   • Modern AU
   • future top Sanemi
   • future bottom Giyuu

   Summary

   Sanemi struggled to make friends. He was angry and defensive from the abuse his difficult homelife Then came the strange boy next door. A little older, completely helpless and kind of pretty... for a boy. Well, he guessed he would have to befriend the weirdo and protect him too.

   Language:

   English

   Words:

   9,453

   Chapters:

   4/?

   Comments:

   11

   Kudos:

   105

   Bookmarks:

   12

   Hits:

   1,483