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1. Casual by cloudwandering

   Fandoms: 怪獣８号 | Kaiju No. 8 (Manga), 怪獣８号 | Kaiju No. 8 (Anime)  

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

   03 Apr 2026

   Tags

   • Creator Chose Not To Use Archive Warnings
   • Hoshina Soushirou/Narumi Gen
   • Ashiro Mina (Kaiju No. 8)
   • Okonogi Konomi
   • Hasegawa Eiji (Kaiju No. 8)
   • Slow Burn
   • Alpha/Beta/Omega Dynamics
   • Narumi Gen is Bad at Feelings
   • Canon-Typical Violence
   • Mating Cycles/In Heat
   • Fluff and Smut
   • Misunderstandings
   • Penis In Vagina Sex
   • Intersex Omegas (Fantasy Morphology)
   • Omega Sexism
   • Porn With Plot
   • Friends With Benefits
   • Rough Sex
   • Eventual Smut
   • Anal Sex
   • Omega Gen Narumi
   • Bottom Narumi Gen
   • Top Hoshina Soushirou
   • Alpha Hoshina Soushiro
   • Masturbation
   • Somnophilia
   • frenemies to lovers

   Summary

   Narumi Gen is the only omega in all of Unit 1 for the Japanese Anti-Kaiju Defense Force. When faced with a decision to answer to the call of his biology or compromise his position with the defense force, Hoshina offers him a solution that even he has trouble turning away.

   Language:

   English

   Words:

   28,208

   Chapters:

   4/7

   Comments:

   31

   Kudos:

   239

   Bookmarks:

   35

   Hits:

   3,594