Iruma-kun Season 4: Guide to the Music Festival Arc

Fans of Welcome to Demon School! Iruma-kun can finally breathe a sigh of relief—the long wait is over! After a dramatic and chaotic Harvest Festival, the Misfit Class is back, and this time, the stakes are musical. Season 4 is officially premiering April 4, 2026, bringing to life one of the manga’s most visually stunning and emotionally engaging arcs: the Music Festival Arc.

As a long-time fan, I have to say—I’m beyond hyped. This isn’t just another school event storyline; it’s where the Misfits truly become a team. If you’ve been following Iruma-kun since Season 1, you know this is the kind of plot that will make you laugh, cheer, and maybe even shed a tear or two.

What We Know About Season 4

Here’s the official lowdown from Bandai Namco Pictures (BN Pictures), who are returning to animate the series:

BN Pictures is known for keeping Iruma-kun vibrant, chaotic, and full of life. Expect colorful animation, expressive characters, and a perfect balance of comedy and high-stakes drama.

The Heart of the Arc: Music Festival

So, why is the Music Festival Arc such a big deal? After surviving the dangerous Harvest Festival, the Misfit Class faces a very different—but equally intimidating—challenge: they must earn Rank 4 (Daleth) to keep their classroom, Royal One.

But here’s the catch: it’s not just about earning points. They need to pull off a show-stopping performance as a class of 13 wildly unique demons. That’s right—13 chaotic personalities trying to harmonize their music, magic, and stage presence. As a fan, I can’t emphasize enough how this arc mixes underdog energy with real character growth.

Spotlight on Purson Soi

One of the most exciting elements of Season 4 is the long-awaited focus on Purson Soi, the Misfit Class “ghost.”

• Purson has been around since Season 1 but remained invisible thanks to his family’s unique ability.
• This season, he steps into the spotlight as the trumpeter who could make or break the class’s performance.
• Iruma takes on the challenge of bringing Purson out of hiding, adding a heartfelt layer of mentorship and friendship.

Honestly, I’ve been waiting years for this moment. Seeing Purson finally recognized as a core part of the Misfit Class is going to feel like a big win for both the character and the audience.

Iruma Suzuki’s New Magical Abilities in Season 4: Breaking Down the Power Creep

Why US Fans Are Losing Their Minds

Communities on Reddit and YouTube are buzzing about what this season could deliver:

1. Musical Spectacle – Fans are expecting epic tracks combining orchestral arrangements with high-energy J-Pop and Rock. The “Hell Dance” is rumored to be a total showstopper.
2. Team Growth – Characters like Allocer and Elizabetta, who often fly under the radar, will finally have their moments to shine.
3. Iruma’s Leadership – The “Evil Cycle” influence might peek through as Iruma navigates the festival with confidence, strategy, and just a hint of mischief.

If BN Pictures nails the soundtrack, this could be one of the most memorable arcs of the series yet.

Key Story Beats to Watch

Here’s what you should keep an eye on:

• The Impossible Goal – Kalego-sensei sets a nearly unreachable standard: if even one student fails to reach Rank 4, Royal One is lost.
• Finding the 13th Member – The class realizes that Purson’s participation is non-negotiable for a true group performance.
• The Performance – The Misfits create a daring “Lilith’s Dance” that fuses music, illusions, and choreography.
• Rivalry & Stakes – Other classes, especially those influenced by the devidol, provide intense competition.

This isn’t just a performance arc; it’s a masterclass in teamwork and character development.

Who is Purson Soi? The Hidden 13th Student of Iruma-kun Season 4 Explained

Where to Watch & Manga Connection

For international fans, Crunchyroll will stream Season 4 globally. English simuldubs usually arrive a few weeks after the Japanese premiere, so you won’t have to wait long to enjoy it in your language.

For those who can’t wait, the Music Festival Arc starts at Volume 17 of the manga. While the anime is known for staying faithful, some subtle hints of the Akudol Games Arc may appear in the second cour, keeping the momentum high.

Final Thoughts

Season 4 of Iruma-kun promises the perfect mix of comedy, heart, and jaw-dropping music. From the long-overdue spotlight on Purson Soi to the Misfit Class truly coming together as a team, this arc is shaping up to be the most ambitious season yet.

Mark your calendars for April 4, 2026—the underworld is about to get a lot louder, and as a fan, I can already feel the goosebumps just imagining the “Hell Dance” performance.

If you’ve been following Iruma-kun, this is the season where all the chaos, humor, and heart pay off. Trust me: you don’t want to miss a single note.