Topic / Subject

Welcome to Demon School! Iruma-kun Season 4 just gave fans a real forward-looking update, with a main trailer and a push for the opening song.

TL;DR

This is a confirmed anime pipeline item, not rumor smoke. Crunchyroll reported that Season 4 released its main trailer, and the trailer features the opening song by Penthouse.

Key Details

• Crunchyroll reported on March 14 that Welcome to Demon School! Iruma-kun Season 4 released a main trailer.

• The same coverage said the trailer features the opening song “Ichi Ni no San” by Penthouse.

• Earlier Crunchyroll reporting said Season 4 is set to premiere on April 4, 2026, which gives the trailer a clear rollout purpose.

• Outlook India and Anime Atelier also matched the trailer, opening song, and April 4 premiere details.

Breakdown

This is the kind of anime update that does real work for fans. A dry announcement card is nice, but a proper main trailer hits harder because it gives people the tone, the music, and a better feel for what the new season wants to sell. Crunchyroll’s report puts this squarely in the “what’s next” lane, which is exactly where Rumor Zoo’s anime coverage is strongest.

The Penthouse tie-in matters too. Theme songs can shape first impressions fast, especially when a series already has a built-in audience waiting on a new season. With the trailer now out and the April 4 start already on the board, the next step is not “is it happening,” it is “how big can this push get before premiere week.”

What to Watch Next

• A sharper promo push from official channels as the April 4 premiere gets closer.

• More cast and character spotlights, including the newly announced Takehito Koyasu role.

• Streaming promotion from Crunchyroll as the season approaches launch.

Sources

Crunchyroll — Welcome to Demon School! Iruma-kun Season 4 Anime Releases Main Trailer Featuring Penthouse Opening Song
Crunchyroll — Welcome to Demon School! Iruma-kun Season 4 Anime Premieres on April 4
Outlook India — Welcome to Demon School! Iruma-kun Season 4 trailer features opening song by Penthouse

Comment

Do you care more about the trailer itself here, or the fact that the April 4 premiere is finally close enough to lock in?