The voice cast for Hero Classroom includes Reiji Kawashima as Blade, Misuzu Yamada as Arnest Flaming, Nao Touyama as Sophi, and Hina Kino as Cú Chulainn.
The anime’s production staff includes Keiichirou Kawaguchi (The Prince of Tennis II: U-17 World Cup) as director, Kousuke Kawamura (Remake Our Life!) as character designer and chief animation supervisor, and Naoki Hayashi (Black Fox script writer) as series screenwriter and scriptwriter. Actas is handling the animation production for the series.
The light novel series was first published in January 2015 and has released 13 physical volumes as of July 2022. The series is written by Shin Araki and illustrated by Haruyuki Morisawa. It is published under Shueisha’s Dash X Bunko label and has also inspired a manga by Koara Kishida in 2016.
Comikey releases the manga adaptation of the Hero Classroom light novels in English. The digital publisher describes the story as:
Blade is a carefree transfer student whose only goal is to make friends with his classmates at Rosewood Academy, a school for heroes-in-training. On the surface, Blade seems like an ordinary boy, but he is hiding a miserable secret with seeds that start long ago, with the defeat of the Demon King at the hands of the Great Hero. Join this new class of friends as they unravel the mystery surrounding Blade, and journey toward becoming full-fledged Heroes!