The netherworld’s most chaotic school is back in session. NHK has confirmed that Mairimashita! Iruma-kun returns for its fourth season on , bringing organised mayhem that’s made this franchise quietly unstoppable since 2019.
The trailer offers what devoted viewers hunger for: a proper glimpse at what’s next, plus a taste of the opening track Ichi Ni no San
from Penthouse. Twenty-four episodes across two consecutive cours means substantial content, not some half-hearted victory lap.
What’s notable here isn’t just the return—it’s the trajectory. Most anime adaptations struggle to sustain momentum past their second season. Yet this franchise has managed something rare: building genuine affection across multiple instalments without burning through its source material.
Crunchyroll will carry the series, maintaining the international pipeline that’s served the show well.
Fresh Voices in the Corridors of Babyls
Two canny additions to the voice roster:
- Takehito Koyasu — known for Dio Brando in JoJo’s Bizarre Adventure and Zeke Yeager in Attack on Titan — steps in as Amduscias Poro.
- Setsuo Ito — whose work as Shigeo
Mob
Kageyama in Mob Psycho 100 demonstrated remarkable range — now voices Purson Soi.
Both additions feel deliberately chosen to expand the abnormal class’s dramatic potential.
The Core Premise Endures
Iruma Suzuki, a mild-mannered fourteen-year-old with spectacularly neglectfulneglectful parents, finds himself sold to a demon who—unexpectedly—just wants a grandson. Rather than torment the lad, this elderly demon enrolls him in Babyls, the underworld’s premier educational institution. Iruma must navigate demonic academia whilst concealing his humanity.
The manga, authored by Osamu Nishi, launched in Weekly Shonen Champion in March 2017. Its progression from serialised work to multi-season franchise reflects something audiences recognised: dependable craftsmanship and escalating stakes.
Series that survive past their third season usually do so because they’ve identified something fundamental about their appeal.
The thirteenth student of the abnormal class remains something of a question mark—teased, but not fully explored. Whether this season delivers on that promise will say much about where the franchise sees itself heading.
What patterns do you notice in long-running adaptations that maintain quality versus those that plateau? Does the strategic addition of veteran voice actors signal confidence in the material, or anxiety about audience retention?
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