Welcome to Demon School! Iruma-kun Season 4: Official Trailer, Key Visual, and Everything We Know So Far
If you’ve been following Welcome to Demon School! Iruma-kun for a while, you probably know the feeling: this is the kind of anime that just makes you smile. It’s funny, chaotic, surprisingly heartfelt, and somehow manages to balance goofy demon school comedy with genuine character growth.
So when the announcement dropped that Season 4 is officially arriving on April 4, 2026, the reaction from fans was pretty much instant excitement. After three seasons of watching Iruma grow from a terrified human kid sold to demons into a confident student at Babyls Demon School, the story is about to enter one of the most beloved arcs in the manga — the Music Festival.
As someone who’s followed the anime and occasionally dipped into the manga, I can honestly say this might be the most exciting season yet.
Let’s break down what we know, what the trailer hints at, and why this season could be something special for anime fans.
Season 4 Release Date and Broadcast Details
First things first: the schedule.
Season 4 isn’t just a short return — it’s getting a full two-cour run, meaning we’ll have half a year of Iruma and the Abnormal Class.
| Detail | Information |
|---|---|
| Premiere Date | April 4, 2026 |
| Broadcast Time | 18:25 JST |
| Total Episodes | 24 |
| Studio | Bandai Namco Pictures |
| Streaming | Crunchyroll |
A 24-episode season is honestly great news. The arcs coming up in the story need space to breathe, especially the Music Festival arc, which is one of the most character-driven parts of the series.
The Trailer: Comedy Meets Pressure
The first trailer wastes no time reminding fans how far Iruma Suzuki has come.
We get flashes of moments from earlier seasons — Iruma surviving demon school, building friendships, and slowly rising in rank. But the tone quickly shifts to something bigger: the class is under pressure.
To keep their prestigious classroom, the Abnormal Class needs to reach certain rank requirements before the end of the school year.
And this time, their solution isn’t just studying harder.
It’s performing.
The trailer teases the Music Festival competition, where students must deliver a musical performance impressive enough to stand out among the entire school.
A few things stood out to me personally:
- Much smoother animation compared to earlier seasons
- More dramatic lighting during stage scenes
- A very energetic preview of the opening song “Ichininosan” by the band Penthouse
The vibe feels bigger and more theatrical than anything we’ve seen from the show before.
The Mystery of the 13th Student
One of the most interesting reveals in the promotional material is the spotlight on Purson Soi.
If you’ve only watched the anime casually, you might not even remember him.
That’s actually the point.
Purson has been present in the Abnormal Class for three entire seasons, but most viewers never noticed him. His bloodline ability allows him to be completely ignored by everyone around him.
It’s one of the funniest running gags in the series.
Season 4 finally changes that.
Purson steps forward as a central character during the Music Festival arc, where his quiet personality and unique talents start to shine.
And honestly, this storyline is something I’ve been waiting to see animated.
Welcome to Demon School! Iruma-kun Season 4: 24 Episodes Confirmed for April 2026 Release
A Perfect Voice Casting Choice
Another big reveal is Purson’s voice actor.
He’ll be voiced by Setsuo Ito, who anime fans will instantly recognize as the voice of Shigeo “Mob” Kageyama from Mob Psycho 100.
That casting choice actually makes a lot of sense.
Both characters share a similar vibe:
- Quiet and observant
- Emotionally subtle
- Surprisingly cool when they finally step into the spotlight
If the performance lands the way fans expect, Purson could easily become one of the standout characters of the season.
What Story Arcs Will Season 4 Cover?
Based on the manga progression from creator Osamu Nishi, the upcoming season will likely adapt chapters around 150–200.
Here’s the most likely structure.
1. Special Tutor Training
Before the festival begins, the Abnormal Class goes through intense training.
Their teachers push them harder than ever to improve their abilities and raise their ranks.
Expect more moments with fan-favorite mentors like Sullivan, Kalego, and Balam.
These segments often mix comedy with serious development for the students.
2. The Music Festival Arc
This is the main event of Season 4.
The Abnormal Class decides to participate in a massive school music competition, and every member has to contribute to the performance.
What makes this arc great isn’t just the songs or choreography — it’s the character growth.
Key highlights include:
- Iruma’s leadership evolving as he motivates the class
- Purson Soi’s backstory and family legacy
- One of the most creative performances Babyls has ever seen
Fans of the manga often rank this arc among the top moments in the entire series.
3. Possible Deviculum Arc
Because Season 4 has 24 episodes, there’s a good chance we’ll also see the beginning of the Deviculum, a massive gathering of elite demons.
This arc introduces more political tension within the demon world and expands the story beyond the school setting.
And if rumors turn out to be true, we might even see the return of the villainous Kirio Amy, one of the series’ most unsettling antagonists.
Why Iruma-kun Feels Different from Other Shonen Anime
One thing I’ve always loved about Iruma-kun is that it doesn’t try to compete with darker battle-heavy series like Jujutsu Kaisen or Chainsaw Man.
Instead, it leans into what makes it unique.
It’s what many fans call a “comfort shonen.”
The appeal comes from several things:
- Wholesome friendships between Iruma, Alice Asmodeus, and Clara Valac
- A demon world that feels quirky rather than terrifying
- An ensemble cast where every character eventually gets a moment to shine
Sometimes you just want an anime that’s fun, heartfelt, and a little ridiculous.
Iruma-kun delivers that consistently.
How to Prepare Before Season 4
If you want to fully enjoy the upcoming season, here’s a quick checklist.
Before April 2026:
- Rewatch Seasons 1–3 on Crunchyroll
- Pay attention to background classroom scenes and see if you can spot Purson Soi
- Start reading the manga around Volume 17 where the Music Festival arc begins
Trust me — spotting Purson in earlier episodes suddenly becomes a fun game.
Final Thoughts
Season 4 of Welcome to Demon School! Iruma-kun feels like the series stepping onto a bigger stage — literally and figuratively.
With a 24-episode run, a fan-favorite story arc, a mysterious character finally getting the spotlight, and some of the most ambitious performances in the show, it’s shaping up to be one of the most memorable seasons yet.
If the anime adapts the Music Festival arc with the same charm and energy the manga has, we might be looking at the best season of Iruma-kun so far.
And honestly, I can’t wait to see the Abnormal Class steal the show.
