Welcome to Demon School! Iruma-kun Season 4

Babyls Demon School prepares for the Music Festival, the final first year promotion exam before the year ends. The Misfit Class still carries a formal order to bring every member to Daleth in order to keep the Royal One classroom, so rehearsals become their last chance to advance. Iruma and friends discover how easy it is to overlook Purson Soi during planning, then build sessions that keep him visible on stage. A set list and staging plan take shape, with parts shared across band, dance, lighting, and props. The class selects a full musical performance titled Liliths Red Carpet and trains through late nights while other battlers crowd the schedule and compete for judges attention. On festival day their cues land clean and Purson holds the spotlight long enough to be scored. Judges issue promotions across the Misfit Class up to Daleth based on the team showing. Iruma receives a separate commendation and moves to He. The class meets the order for Royal One and closes the year with the goal achieved.