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.
D-Don't get so full of yourself!
!لا تغترّ بنفسك
Jetzt wirst du’s sehen!
No te pongas engreído.
No te pongas chulo.
Ne t’y crois pas trop !
A-Abbassa la cresta!
N-Não fique tão cheio de si mesmo!
Не зазнавайся!