Mumei is confined in a classroom full of traps. 
Trying to escape along with his comrades, they set off the traps and are sent to another world.
A strange old man was waiting there. 
Mumei's classmates exhaust themselves without skills going up against an enemy that gets stronger the more he drinks.
A sense of foreboding reaches the bewildered Mumei.
What's the matter?
ما الخطب؟
Was ist denn los?
¿Qué pasa?
¿Qué pasa?
Eh ben, qu’est-ce que vous avez ?
L’examen est bientôt fini, vous savez.
Che vi prende?
Que foi?