The Demon Lord's companion, Sylphy, reappears in the modern world after several thousand years. A masked man tells Sylphy where she can find the Demon Lord and she... 

Meanwhile, the Magic Academy is preparing for its school festival, and Ard is asked to perform in a play in lieu of their Sword King Battle Tournament while also dealing with a threat to cancel the festival. Ard and the others start discussing the play when they're interrupted by a huge commotion at the school.
Far stronger than the Demon Lord!
!أقوى بكثير من ملك الشياطين
Viel stärker als der Dunkle Lord!
¡Soy más fuerte que el Señor Oscuro!
¡Soy más fuerte que el Señor Oscuro!
Bien plus que le Roi démon !
Molto più forte del Re dei Demoni!
Muito mais do que o Lorde Demônio!
Сильнее самого владыки!