The Raging Champion (S01E06)

After several millennia, Sylphy, the companion of the Demon Lord, suddenly returns to the modern world. A mysterious masked figure guides her to the Demon Lord's location. Meanwhile, the Magic Academy gears up for its upcoming school festival. Ard is invited to take part in a play, stepping in for the Sword King Battle Tournament, all while facing the looming threat of the festival's cancellation. As Ard and his friends brainstorm ideas for the play, their conversation is abruptly disrupted by an enormous uproar erupting at the school.