By Kaito Akuma Published on May 31, 2026 2 min read

Welcome to Demon School! Iruma-kun Season 4: The Music Festival Arc Explored

Analysis, Editorial, Deep Dive
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# Welcome to Demon School! Iruma-kun Season 4: The Music Festival Arc Explored

After three seasons of teasing, the final member of the Misfit Class is finally getting his spotlight: **Soi Purson** — expressionless face, lilac hair, and a family creed of "don't stand out." With the Music Festival being the last chance for the remaining second-rank students to hit rank four, Elizabetta and Purson need to shine — which is a problem when most of the class didn't even know Purson existed in the first place.

Teacher Naberius Kalego, impressed by his students' Harvest Festival performances but still pushing for more, has set the Music Festival as the next proving ground. The stakes are real: if Purson doesn't rank up in time, the class loses access to their coveted classroom, **The Royal One**.

## Where to Watch

The anime airs on **NHK Educational** in Japan, with **Crunchyroll** streaming it internationally across North America, Europe, Africa, Oceania, the Middle East, and India — on Saturdays as it airs.

## Why Fans Are Loving It

What started as a humble comedy about a boy trying not to get eaten at demon school has grown into a surprisingly solid fantasy series, each season expanding its cast and world while never losing the charm and humor that made the early episodes such a delight. It functions as counter-programming to grand epics like *One Piece* — a warm, low-stress weekly ritual where character bonds, school festivals, and small victories are the whole point.

## Series Background

The story follows Iruma, a 14-year-old whose selfish parents sell him to a demon — who, having no grandson of his own, ends up doting on him and enrolling him in demon school. The manga by Osamu Nishi has been running in *Weekly Shōnen Champion* since March 2017. Season 3 wrapped in 2023, and the fourth season was confirmed at a special fan event in late 2024.

If you've never watched it, it's accessible to all ages — Iruma and the cast are likable and relatable, and the story works whether you're a younger viewer or a seasoned anime fan. All three previous seasons are available on Crunchyroll to catch up.

K
Written By

Kaito Akuma

Lead Content Strategist at MangaMotive

A veteran of the anime industry with over a decade of experience in manga editorial and community building. Kaito specializes in industry analysis and uncovering hidden gems in the world of Seinen and Shonen.

Tags

iruma-kun
season-4
music-festival
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