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1. Math by Pichu_la

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

   • Explicit
   • Underage Sex
   • M/M
   • Complete Work

   24 Jan 2026

   Tags

   • Underage Sex
   • Agatsuma Zenitsu/Shinazugawa Genya
   • Shinazugawa Genya & Shinazugawa Sanemi
   • Agatsuma Zenitsu & Hashibira Inosuke & Kamado Tanjirou
   • Agatsuma Zenitsu & Hashibira Inosuke & Kamado Tanjirou & Shinazugawa Genya
   • Agatsuma Zenitsu & Kaigaku & Kuwajima Jigorou
   • Daki | Ume & Gyutaro & Hashibira Inosuke
   • Shinazugawa Genya
   • Agatsuma Zenitsu
   • Hashibira Inosuke
   • Kamado Tanjirou
   • Shinazugawa Sanemi
   • Kaigaku (Kimetsu no Yaiba)
   • Gyutaro (Kimetsu no Yaiba)
   • Kuwajima Jigorou
   • Omega Agatsuma Zenitsu
   • Embarrassed Shinazugawa Genya
   • Top Shinazugawa Genya
   • Bottom Agatsuma Zenitsu
   • Alpha/Beta/Omega Dynamics
   • Shinazugawa Genya-centric
   • Shinazugawa Sanemi Being an Asshole
   • Shinazugawa Sanemi is a Good Sibling
   • Agatsuma Zenitsu is a Mess
   • Agatsuma Zenitsu-centric
   • Agatsuma Zenitsu Has a Vagina
   • Multiple Orgasms
   • Multiple Sex Positions
   • Out of Character
   • Porn With Plot
   • Friends With Benefits
   • First Kiss
   • Students
   • First Time
   • Oral Sex
   • Rough Oral Sex
   • Vaginal Sex
   • Orgasm
   • Size Difference
   • Boypussy

   Summary

   Genya was about to take another sip of tea when a sharp pain shot through his head.

   The cup fell beside him on the floor, shattering. He curled in on himself, a low, hoarse groan escaping his lips. His body tensed, his shoulders hunched, and an uncontrollable tremor shook him.

   "Genya? Are you okay?" Zenitsu’s voice was a thread of worry as he approached, his golden eyes fixed on the Enigma.

   Or

   Genya's heat comes early and he loses control in front of his Omega friend, Zenistu.

   Language:

   English

   Words:

   7,812

   Chapters:

   1/1

   Comments:

   6

   Kudos:

   31

   Bookmarks:

   4

   Hits:

   498