Welcome to Demon School! Iruma-kun Season 4 Trailer Features Opening Song By Penthouse

The main trailer for Osamu Nishi's Welcome to Demon School, Iruma-kun (Mairimashita! Iruma-kun) fourth season has been unveiled. The trailer features the season's opening theme song Ichi Ni no San (One, Two and Three) by the Japanese band Penthouse.

According to Crunchyroll, Penthouse's vocalist and guitarist Shintaro Namioka, on the anime's official website, said, "We’ve expressed the beauty of this work—which blends a comical and pop world with moments that suddenly warm your heart—through the opening theme for a chapter that intertwines the demon realm with music. I think this is the kind of track that makes you want to get up and dance somewhere between coolness and liveliness. We hope you’ll enjoy it along with the anime!"

The site also announced that Takehito Koyasu will voice Amduscias Poro in the show.

"Hello there! Takehito Koyasu is joining Iruma-kun’s world! Poro-chan’s character design is just too awesome! This cool and cute powerhouse is going to shine in the Music Festival arc, so stay tuned! I love Polo-chan so much," Koyasu said.

About Welcome to Demon School! Iruma-kun Season 4

Series director Makoto Moriwaki will serve as the chief director for the fourth season, with Ayaka Tsujihashi as director. Bandai Namco Pictures is behind the animation production.

The first season was released in 2019, followed by the second in 2021 and the third in 2022. All seasons are streaming on Crunchyroll.

"Suzuki Iruma, 14, one day finds himself taken against his will into the world of demons. To add to his predicament, his doting owner and self-appointed "Grandpa" is the chair-demon at his new school. In order to survive, Iruma must deal with a haughty student who challenges him to a duel, a girl with adjustment issues, and so many more scary beings! Can this ultimate pacifist dodge the slings and arrows that are flung his way? As he struggles frantically, Iruma's innate kindness begins to win over enemies," reads the official synopsis of the show.

Welcome to Demon School! Iruma-kun Season 4 release date

According to Anime News Network, it will debut on April 4 on NHK Educational at 6:25 pm JST and will stream in Japan on April 6 at 6:00 pm JST. The fourth season will have 24 episodes that will run for two quarters of a year.

It will be streamed in Crunchyroll in India, North America, Central America, South America, Europe, Africa, Oceania, the Middle East and the CIS.

Nishi launched the manga in Akita Shoten's Weekly Shōnen Champion magazine in March 2017, with 47 volumes released in Japan.