• Book Name: Welcome To Demon School! Iruma-Kun - Kalego Gaiden Manga
• Alternative(s): 魔入りました！入間くん 外伝 ; Mairimashita! Iruma-kun: Kalego Gaiden ; Welcome to Demon School! Iruma-kun - Kalego Side Story
• Genre(s): Action Comedy Fantasy School Life Shounen
• Author(s): Nishi Osamu
• Status: Ongoing Download Manga
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Summary: A special, two-part side story manga set in the world of *Mairimashita! Iruma-kun*, focusing on Naberius Kalego during his days as a student of Babyls Demon School.