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.
I'm sure she's plotting something.
لا بدّ أنّها تدبّر لشيء
Die führt doch sicher
irgendetwas im Schilde!
Je suis certain
qu’elle trame quelque chose.
Sono certo che stia complottando qualcosa.
Tenho certeza que ela está tramando algo.
Держу пари, она что-то задумала.