Is Mairimashita! Iruma-kun Worth Reading?
Quick Answer
Yes, if you want a long-running fantasy comedy with a genuinely likable underdog lead -- Iruma's accidental rise through demon-school society stays fun across dozens of volumes.
Quick Verdict
“Charming and sustained: a long-running fantasy comedy that keeps its fish-out-of-water premise consistently entertaining.”
Best for: Readers who want a long-running, family-friendly fantasy comedy with an endearing underdog protagonist.
Not for: Readers wanting a shorter series -- at 49-plus volumes and still ongoing, this is a serious time commitment.
- Type
- Manga
- Genres
- School Life, Fantasy, Comedy
- Status
- Ongoing
- Author
- Osamu Nishi
- Publisher
- Akita Shoten (JP); Kodansha USA (EN)
- Platform
- Kodansha USA / digital storefronts
| Quick facts | |
|---|---|
| Format | Manga, 51 volumes |
| Run | 2017–present · ongoing |
| Community score | AniList 8.3 · MangaUpdates 8.3 |
What is Mairimashita! Iruma-kun about?
Iruma Suzuki is a timid 14-year-old human boy sold off by his neglectful parents to a demon named Sullivan -- who, instead of eating him, adopts him as a beloved grandson and enrolls him at Babyls, a school for young demons. Iruma has to survive day-to-day school life while hiding the one secret that would get him killed: that he's human. Along the way he befriends fellow misfit students Alice and Clara, rises unexpectedly through the school's ranks almost entirely by accident, and the story builds into a long-running fantasy comedy about an ordinary kid thriving in a world that isn't built for him.
Written and illustrated by Osamu Nishi, the series has run in Weekly Shonen Champion since 2017 and remains ongoing, with 49 volumes released as of mid-2026 plus a popular anime adaptation.
Does the 'secretly human at demon school' premise stay fun over a long run?
Yes, largely because the series keeps escalating Iruma's accidental rise to popularity and power in creative ways -- the constant tension of him almost being discovered, paired with his genuine growth into someone the Demon World comes to respect, gives the formula real momentum across dozens of volumes rather than feeling repetitive.
Is the humor family-friendly?
For the most part, yes. It's a mainstream Shonen Champion series with broad comedic appeal, built around Iruma's fish-out-of-water situation and a colorful cast of demon classmates and teachers rather than crude or mature content. Several characters are shown having crushes on Iruma, playing out as typical unresolved shonen-comedy affection rather than developing into a central romantic plotline.
Is it worth reading?
For readers who want a long-running, good-natured fantasy comedy with a likable underdog lead, Mairimashita! Iruma-kun is an easy, satisfying pick. At 49-plus volumes it's a serious commitment, but the steady stream of creative demon-world worldbuilding and Iruma's genuinely earned growth keep the series consistently entertaining rather than feeling padded.
Strengths & Weaknesses
Strengths
- A genuinely charming fish-out-of-water premise that keeps escalating in creative ways across a long run.
- Iruma is an easy protagonist to root for, with growth that feels earned rather than arbitrary.
- A broad, likable supporting cast of demon classmates and teachers keeps the world feeling lived-in.
- Consistently family-friendly, mainstream comedy that doesn't rely on crude humor.
Weaknesses
- At 49-plus volumes and still ongoing, it's a major time commitment with no end in sight.
- The episodic, escalating structure means it rarely slows down for deep character introspection.
- Several characters' crushes on Iruma remain perpetually unresolved, which may frustrate readers wanting romantic payoff.
Similar Titles
Prefer to watch? There's an anime
Welcome to Demon School! Iruma-kun: see where to stream it legally, plus episode guides and trailers, on Watchanimee.
Frequently Asked Questions
Is Mairimashita! Iruma-kun finished?
No, it's still ongoing, with 49 volumes released as of mid-2026 and new chapters continuing to come out.
Is there an anime adaptation?
Yes, multiple anime seasons have aired, adapting the manga's early and middle arcs, with the manga continuing further ahead.
Is this manga appropriate for younger readers?
Yes, it's a mainstream, family-friendly fantasy comedy without crude or explicit content.
