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Welcome to Demon School! Iruma-kun: Irumafia Edition 1 by Osamu Nishi

Welcome to Demon School! Iruma-kun: Irumafia Edition 1

Osamu Nishi

Kodansha USA · Paperback · August 19, 2025

Welcome to Demon School!

General MangaFantasy ComicsOccult & Supernatural Comicsjapanese
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graphic
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Who it’s for
A gentle streak and a mafia-sized inheritance make for an exuberantly odd change of pace.
Themes
Kindness amid hardship, Mafia family succession
Genres
General Manga, Fantasy Comics, Occult & Supernatural Comics

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About this book

Iruma-kun, the mob boss?! In this brand-new spinoff of the runaway hit series, Iruma is a dirt-poor but kind young boy who grows up in a ruthless city slum. One day, Iruma gives a severely injured old man his last loaf of bread and nurses the stranger back to health—only to find out that the elder gent is none other than Don Sullivan, leader of the Babel Mafia! Soon after, Don Sullivan comes back, whisks Iruma away, and begs the boy to become his grandson.

Continue reading

And just like that, the curtains rise on Iruma’s chaotic new life as the next in line to a gigantic gang of—dare we say—demonic mafiosos!

Kindness Meets Mayhem

A gentle streak and a mafia-sized inheritance make for an exuberantly odd change of pace.

Come here for

  • A kind-hearted lead amid ruthless-city and mafia absurdity
  • A spinoff with a playful, chaotic edge

Expect

  • A sudden turn from last-loaf generosity to gang-family life
  • Demonic mafiosos and an unexpected heir

Where it sits

Fantasy Comics61%
General Manga54%
Occult & Supernatural Comics29%

Percentages are BookFrontier’s reading of the book.

Publisher categories

  • General Manga
  • Tie-In Comics
  • Action & Adventure Comics
Authors
Osamu Nishi
Publisher
Kodansha USA
Published
August 19, 2025
Format
Paperback
Theme
Kindness amid hardship · Mafia family succession
Reading lane
General Manga