I just found out there is a spin off manga 86 Eightysix operation

86 — Eighty-six — Operation High-School Manga Chapter 1

Mangas by author Asato Asato - MangaFire

86 Gets Magical Girl Spinoff Manga on March 27 - News - Anime News

» Archive » 86 Eighty Six ends its operational pause

I just found out there is a spin off manga 86 Eightysix operation

Manga Like 86: Eighty Six - Operation High School

86 -eighty six-, Dengeki Wiki

86: Operation High School] : r/EightySix

86: Eighty-Six Manga

86 Eighty-Six Series Exceeds 1.8 Million Copies in Circulation