Welcome to Demon School! Iruma-kun Season 4 Episode 4: We Can't See Him, But...

Asmodeus Alice and Clara Valac sit in the Royal Classroom at night. They attempt to 'open their hearts' for their upcoming Music Festival performance. Asmodeus, ever formal, points out their lack of synchronization. Clara, in her chaotic way, makes funny faces instead, frustrating him completely. Their shouting match escalates, a full-blown argument about their fundamental differences, until they collapse exhausted on the grass. Lying under the night sky, their shared frustration gives way to a quiet reflection.

On the grass, Asmodeus and Clara's shared sigh turns to talk of Iruma. They both admit missing him, and how much they look forward to his return. It is a poignant moment: without Iruma, they acknowledge, they would not have spoken. This realization creates a shift, moving them from conflict to a quiet understanding. Clara, ever the instigator, begins poking Asmodeus and trying out nicknames, settling on 'Azz-Azz.' His initial annoyance softens, a sign of their new, fragile bond. They head back inside, ready to truly cooperate.

The rest of the Misfit Class struggles with dance rehearsals. Sweat and fatigue are visible on many faces, their stamina failing. Asmodeus and Clara rejoin the bickering, unable to synchronize their movements. Keroli Crocell, observing, knows perfect harmony is needed for the show to succeed. Then, the doors swing open, and Iruma enters. He wears an elaborate, high-collared stage outfit, his hair pulled back. The costume lends him a mature air, leaving his classmates speechless. They stare in awe at his transformation. He begins his dramatic scene with Elizabetta, who plays Lilith, presenting a prop love letter. Asmodeus and Clara react with dramatic shouts and tears, wholly invested in the romantic tension. Iruma's performance is surprisingly convincing, showing dedication.

Iruma moves to the grand piano, with Purson Soi joining invisibly on the trumpet. Technical skill is present, but Iruma feels a lack of emotional 'flavor.' He stops, frustrated. A brief flashback shows Iruma and Purson practicing alone. Purson, still invisible, speaks of interpreting 'Lilith's Carpet,' not merely imitating. He encourages Iruma to find his personal connection to the music. Back in the present, Iruma closes his eyes. He visualizes Lilith's beauty, drawing inspiration from Elizabetta's kindness. As he plays again, the music transforms. It fills with vibrant energy and emotional weight. Purson's trumpet perfectly complements the piano. The classmates are visibly moved, their expressions shifting to wonder. Enthusiastic cheers erupt. Iruma is breathless, relieved. He turns to Elizabetta, bashfully asking for his rehearsal love letter back. The class's confidence is solid. They now believe they have a performance worthy of the main stage.

The celebratory mood is broken when Purson Soi's phone vibrates. He slips away to answer it, his expression grim. Keroli watches him, concerned. The scene shifts to the class working on stage costumes. Keroli directs students, giving Purson special attention. She reveals the 'Secret Veil,' a translucent fabric with recognition-distorting magic. This will allow Purson to perform on stage without being clearly seen, honoring his family's tradition of absolute stealth. Purson tries it on. His features blur, satisfying Keroli's standards. The class marvels at the clever solution. They believe all thirteen members can perform together, respecting everyone's needs. This invention seems to solve their final obstacle. A montage shows the Misfit Class pushing to their limits. The dance and music merge into a cohesive performance. Purson practices with determination, his invisible presence felt through his trumpet. Camaraderie is high, bickering replaced by shared goals. The classroom looks ready for the big event.

Late at night, Purson walks the empty, moonlit corridors of Babyls. He reflects on his time with the Misfit Class. He spent most of his life trying to be invisible, forgotten. Now he wants to be part of something bigger. He touches his trumpet case, a small smile appearing as he remembers Iruma's words of encouragement. This internal monologue highlights his growth, from passive observer to valued member. He feels a belonging he never expected.

Inside the faculty office, Professor Naberius Kalego looks sterner than usual. He is on the phone with Purson Soi's Father. The father is furious that his son plans to participate in a public event. He demands Kalego immediately withdraw Purson from school. This, he says, will prevent dishonor to their family's lineage of absolute stealth. Kalego listens silently, his brows furrowed. He realizes the severe threat to the Misfit Class's unity and Purson's future. The conversation highlights the harsh cultural expectations placed on some demon families. Kalego’s voice then booms over the intercom, summoning Purson Soi. The announcement causes confusion in the Royal Classroom. Purson stands slowly, his face devoid of emotion. His hands tremble slightly as he heads for the door. Iruma and the others watch him go, worried. A sense of foreboding fills the room.

In the faculty office, Kalego hands the phone to Purson. Purson speaks directly with his father one last time. The conversation is brief and one-sided, a harsh ultimatum about his duty to the family's legacy of invisibility. Purson hangs up, looking small and defeated. He weighs his desire to perform against his ingrained fear of his father's authority. Kalego watches him with a piercing gaze, offering no easy way out. The weight of tradition seems to crush Purson's newfound dreams. The next morning, the Misfit Class gathers. The usual energetic atmosphere is replaced by heavy silence. Kalego enters and bluntly announces that Purson Soi is withdrawing from Babyls. He will not participate in the Music Festival. The students gasp in horror and disbelief. Iruma is devastated, pale. He looks at Purson's empty seat. The class is stunned by the sudden turn of events.

Despite Kalego's insistence that the decision is final, Iruma refuses to accept it. He stands and shouts that he can still feel Purson's presence. He begs his friend not to leave them behind. Inspired by Iruma's passion, the rest of the class joins in. Each student calls out to Purson, expressing how much he means to them. The scene is emotional and tense. It ends with the entire class united, refusing to perform without all thirteen members. Their collective voices ring through the classroom, a powerful declaration of their unbreakable bond. This moment, filled with raw emotion, solidifies their unity.

In a humorous post-credits scene, Elizabetta reads the rehearsal love letter Iruma gave her, blushing. Iruma approaches, flustered. He explains he wrote it by listing genuine things he admires about her. Elizabetta is deeply touched. She tells him she will treasure it forever. Iruma is left stammering, embarrassed by her joyful reaction. The class's momentum continues. A title card appears, showing a countdown: '1 Day Left.' The tension lingers. A large '1 Day Left' is written on the whiteboard in the classroom. The focus is on the empty trumpet case on Purson's desk, symbolizing the missing piece. The scene fades to black with a distant trumpet note. Suspense remains alive for the upcoming climax.