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.
Don't get full of yourself, you idiot.
لا تغترّ بنفسك أيّها المغفل
Werd nicht übermütig, Blindgänger.
No te dejes llevar.
No te dejes llevar.
Calme ta joie, pauvre ignorant.
Non esaltarti troppo, idiota.
Não fique confiante demais, idiota.