New Trailer for the Fourth Season of "Welcome to Demon School, Iruma-kun!": Takehito Koyasu Voices Poro

A new main trailer has been released for the fourth season of the anime television series "Welcome to Demon School, Iruma-kun!" (Japanese: "Mairimashita! Iruma-kun"). It features for the first time the opening theme "Ichi Ni no San" by the band Penthouse. Simultaneously, it was announced that voice actor Takehito Koyasu (known for roles such as DIO in "JoJo's Bizarre Adventure") will take on the role of Amduscias Poro.

Poro is a former member of the "13 Crowns" and bears the nickname "Sound Magician." As a former court musician for the missing Demon King Derkila, he holds a deep connection to him. In the music festival that forms the setting of the new season, he will stand before Iruma and his friends as a strict jury member. Koyasu enthusiastically commented on his role: "Hello everyone! Koyasu joins the world of Iruma-kun! Poro-chan's character design is simply too beautiful! This cool, cute, and strong guy will play a big role in the music festival – please look forward to it! I love Poro-chan!".

The story follows the human boy Iruma Suzuki, who is sold by his parents to a demon and must henceforth hide his humanity at Babyls Demon School. In the fourth season, his class, the "Misfit Class" (Abnormal Class), faces the seemingly impossible challenge of all thirteen members reaching the fourth rank. To achieve this, they plan to participate together in the school's grand music festival.

The broadcast of the new season begins in Japan on April 4, 2026, on NHK E-TV. The series will comprise two consecutive cours (totaling 24 episodes). Japanese streaming services will start their release on April 6.

The animation production once again comes from BN Pictures. The main roles will continue to be voiced by Ayumu Murase (Iruma), Ryohei Kimura (Alice Asmodeus), and Ayaka Asai (Clara Valac).