by The official synopsis and preview images for Episode 17 of Welcome to Demon School! Iruma-kun have been released, teasing a major turning point in the series as the powerful Thirteen Crowns gather to discuss the future of the Demon World.
Titled “Gathering of Heroes,” the episode is scheduled to air on Saturday, July 25, during the anime’s regular broadcast slot on NHK E Tele. It will also be available for streaming on popular platforms, including ABEMA, Disney+, U-NEXT, Hulu, and other participating services.
With the long-vacant Demon King throne becoming the center of attention, Episode 17 promises political intrigue, fierce rivalries, and the introduction of important new characters who could shape the future of the story.
Welcome to Demon School! Iruma-kun Continues Its Successful Run
Based on the hit manga by Osamu Nishi, Welcome to Demon School! Iruma-kun is one of the most beloved comedy-fantasy anime of recent years.
The manga has been serialized in Akita Shoten’s Weekly Shonen Champion since March 2017 and has steadily grown into a fan favorite thanks to its unique blend of comedy, heartwarming friendships, school life, and action-packed adventures.
As of March 2026, the manga has surpassed 20 million copies in circulation worldwide, including print and digital editions, highlighting its continued popularity both in Japan and overseas.
The anime adaptation follows Suzuki Iruma, an exceptionally kind-hearted human boy who is unexpectedly sold to a demon by his irresponsible parents. Fortunately, the demon—Sullivan, one of the most influential figures in the Demon World—adopts Iruma as his beloved grandson instead of harming him.
Iruma soon enrolls at Babyls Demon School, where Sullivan serves as chairman. Since humans are considered mythical beings in the Demon World, Iruma must keep his true identity secret while adapting to demon society and surviving countless unexpected challenges.
Along the way, he forms close friendships with:
- Asmodeus Alice, his fiercely loyal classmate and self-proclaimed rival-turned-best friend.
- Clara Valac, whose energetic personality and unpredictable behavior constantly lead to hilarious situations.
Together, the trio experiences unforgettable adventures while Iruma gradually earns respect from classmates, teachers, and even powerful demons throughout the Demon World.
Season 4 Raises the Stakes
The currently airing fourth season continues adapting some of the manga’s most popular story arcs.
Recent episodes have focused on the Music Festival Arc, where the Misfit Class was challenged to strengthen teamwork, improve their magical abilities, and demonstrate how much they have grown both individually and as a group.
Following the emotional climax of the festival, Episode 16 shifted to a lighter atmosphere with the annual year-end celebration held by the Misfit Class.
Viewers also saw Iruma working alongside Opera, Sullivan’s capable and mysterious butler, offering several entertaining interactions while giving fans a chance to relax before the story entered its next major arc.
Episode 17 “Gathering of Heroes” Synopsis
Episode 17 marks the beginning of a significant political storyline as the Thirteen Crowns, the highest-ranking leaders of the Demon World, gather for an important meeting.
Known as the Thirteen Dinner, this prestigious assembly brings together the most influential demons to discuss issues affecting the entire Demon World.
The meeting’s primary agenda is determining who should inherit the title of Demon King, a position that has remained vacant since the disappearance of the legendary former ruler, Delkira.
Many demons have long believed that one of the three greatest candidates would eventually succeed Delkira:
- Sullivan
- Lady Levi
- Belial
However, the meeting takes an unexpected turn when it becomes clear that the next Demon King will not be chosen directly from these three respected leaders.
This surprising development leaves everyone wondering who could become the next ruler of the Demon World.
A Rivalry Between the Next Generation
While the Thirteen Crowns debate the future of the Demon World, attention shifts to the younger generation.
Two promising young demons arrive as guests at the gathering:
- Leviathan Rage (voiced by Yuma Uchida)
- Belial Berry Raspberry (voiced by Yoshitsugu Matsuoka)
As the grandsons of two of the leading Demon King candidates, both possess tremendous pride and ambition.
Before long, the pair begin arguing over which of them is more worthy of becoming the future Demon King.
Their heated confrontation hints that the struggle for the throne may not only involve the current generation of powerful demons but also the heirs who hope to inherit their legacy.
The rivalry is expected to introduce fresh competition and expand the political landscape of the series beyond Babyls Academy.
Why Episode 17 Is Important
Although Welcome to Demon School! Iruma-kun is widely known for its comedy and school-life adventures, Episode 17 signals a shift toward larger-scale world-building.
For the first time in the season, viewers will witness many of the Demon World’s highest-ranking officials gathered in one place, offering a deeper look at its political system, leadership structure, and long-standing power struggles.
The mystery surrounding Delkira, the former Demon King, also continues to grow. His absence has remained one of the biggest unanswered questions in the series, and discussions about choosing a successor may provide new clues about his legacy and the future of the Demon World.
What Fans Can Expect
Based on the official preview, Episode 17 will feature:
- The long-awaited meeting of the powerful Thirteen Crowns
- New revelations about the vacant Demon King position
- Political discussions that could reshape the Demon World
- The introduction of influential new characters
- A heated rivalry between Leviathan Rage and Belial Berry Raspberry
- More world-building beyond Babyls Demon School
- Comedy mixed with suspense and political intrigue
With the story moving beyond the classroom and into the highest levels of demon society, viewers can expect a fresh perspective on the world that Iruma has come to call home.
Final Thoughts
Episode 17, “Gathering of Heroes,” appears to be one of the most significant episodes of Welcome to Demon School! Iruma-kun Season 4 so far. By bringing together the legendary Thirteen Crowns and opening discussions about the long-vacant Demon King throne, the series begins exploring a much larger conflict that extends far beyond Babyls Academy.
At the same time, the rivalry between Leviathan Rage and Belial Berry Raspberry adds excitement and introduces a new generation eager to prove themselves worthy of leading the Demon World.
For longtime fans and newcomers alike, this episode promises an engaging mix of comedy, politics, character introductions, and major story developments that could influence the direction of the series for episodes to come.
