Barnabus, the mage known as the “Transcendent”, comes to Wimberg Kingdom. He is also the principal of the Barbador Magic Academy that Kannazuki and the others attended. Barnabus claims that a problem has arisen with the arrival of heroes from another world. Then an urgent messenger appears with news that a large horde of monsters has appeared in the woods near the kingdom.

Holding them off are the Valkyries, the adventurer’s guild, Saria, and the others! A great, fast-paced battle against monsters is about to begin!
Is this about the Kaiser Empire's 
heroes enrolling in the academy?
هل الأمر عن أبطال إمبراطورية القيصر
الملتحقين بالأكاديمية؟
geht es um die Helden
des Kaizel-Kaiserreichs,
C’est à propos des héros envoyés
à l’académie par l’empire de Kaiser,
riguarda l'iscrizione all'accademia
degli Eroi dell'impero Kaiser?
é sobre os Grandes Heróis do Império
Kaiser matriculados na academia?
это насчёт поступивших в академию 
героев империи Кайзер?