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1. Not in my freaking twenties?! by chisekarino (shiukomaki) for MommyTadashi

   Fandoms: Haikyuu!!  

   • Explicit
   • Creator Chose Not To Use Archive Warnings
   • M/M
   • Complete Work

   14 Sep 2025

   Tags

   • Creator Chose Not To Use Archive Warnings
   • Miya Atsumu/Miya Osamu
   • Miya Atsumu
   • Miya Osamu
   • Incest
   • Brother/Brother Incest
   • Alpha/Beta/Omega Dynamics
   • Mating Cycles/In Heat
   • Onigiri Miya Shop (Haikyuu!!)
   • Plot What Plot/Porn Without Plot
   • come in a flash exchange
   • assertive omega
   • Pining
   • moment of falling in love
   • Top Miya Osamu
   • Bottom Miya Atsumu

   Summary

   When Atsumu is stuck minding the store alone with Osamu on a sweltering hot summer's day, their scent blockers sweat off their skin just as Atsumu's pre-heat hits.

   He was already starting to feel lightheaded and slightly drunk on Osamu’s pheromones. He bit his lip as he eyed Osamu from his lips, to his eyes, back down to those kissable lips that looked unique, not like Atsumu’s own anymore…unfamiliar now…new…desirable…soft…

   “Tsumu, yer scent’s uh…”

   Atsumu’s eyes widened as he realized he’d been daydreaming.

   “Oh, uh, sorry, Samu. I can keep working til close. It’s just preheat, I’m not weakened or anything!”
   

   Series

   • Part 17 of Miyas Omegaverse Cluster

   Language:

   English

   Words:

   3,143

   Chapters:

   1/1

   Collections:

   1

   Comments:

   6

   Kudos:

   62

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