'Welcome to Demon School, Iruma-kun' Season 4 Reveals Opening Song Artists, Half-Year Run, April 4 Debut Posted on March 3, 2026 By admin No Comments on 'Welcome to Demon School, Iruma-kun' Season 4 Reveals Opening Song Artists, Half-Year Run, April 4 Debut 24-episode new season airs for 2 cours; Penthouse performs opening song “Ichi Ni no San” Source: https://www.animenewsnetwork.com/news/2026-03-03/welcome-to-demon-school-iruma-kun-season-4-reveals-opening-song-artists-half-year-run-april-4-debut/.234853 Anime