Two spinoff manga have been unveiled for Osamu Nishi’s Welcome to Demon School! Iruma-kun manga, including one that focuses on Naberius Kalego titled Mairimashita! Iruma-kun Kalego Gaiden, which premieres as a five-chapter series in Akita Shoten’s Weekly Shonen Champion magazine this winter. Prior to that, though, will be hiromono’s Mairimashita! Iruma-kun if Episode of Mafia in this year’s October issue of Bessatsu Shonen Champion on September 12.
You can see the announcement video below.
9/12発売、別冊少年チャンピオン10月号にてhiro者先生による西修先生監修の『魔入りました！入間くんif Episode of 魔フィア』の連載開始！
— 魔入りました！ 入間くん【公式】 (@wc_mairuma) July 23, 2023
Welcome to Demon School! Iruma-kun manga launched in Weekly Shonen Champion in 2017 and has inspired three seasons of TV anime so far. Crunchyroll streams the series and describes it like so:
Suzuki Iruma, human, 14, one day finds himself taken against his will into the world of demons. To add to his predicament, his doting owner and self-appointed “Grandpa” is the chair-demon at his new school. In order to survive, Iruma must deal with a haughty student who challenges him to a duel, a girl with adjustment issues, and so many more scary beings! Can this ultimate pacifist dodge the slings and arrows that are flung his way? As he struggles frantically, Iruma’s innate kindness begins to win over enemies.