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1. Great Teacher Grimoire (High School DxD Multicross, OC-SI, Celestial Grimoire) by TheOutsider

   Fandoms: Highschool DxD (Anime), ハイスクール DxD - 石踏 一榮 | High School DxD - Ishibumi Ichiei, Multi-Fandom  

   • Explicit
   • Graphic Depictions Of Violence, Major Character Death
   • F/F, F/M
   • Work in Progress

   23 Oct 2026

   Tags

   • Graphic Depictions Of Violence
   • Major Character Death
   • Original Characters
   • Original Male Character(s)
   • Rias Gremory
   • Rias Gremory's Peerage
   • Sona Sitri
   • Sona Sitri's Peerage
   • Hyoudou Issei
   • Mittelt (Highschool DxD)
   • Kalawarner (Highschool DxD)
   • Raynare (Highschool DxD)
   • Dohnaseek (Highschool DxD)
   • Original Character(s)
   • Self-Insert
   • Canon-Typical Violence
   • Celestial Forge (Celestial Forge CYOA)

   Summary

   A reincarnated high school teacher discovers that the cozy, slow life world he'd been reincarnated into is actually an urban fantasy setting. With a newly awakened magic book in his soul, what else is a man to do but to teach his way to success? That'd be great... If only he could stop running into the most problematic pupils imaginable.

   Celestial Grimoire/OC-SI

   Language:

   English

   Words:

   26,808

   Chapters:

   4/?

   Comments:

   16

   Kudos:

   90

   Bookmarks:

   63

   Hits:

   3,297