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.
Traps with infrared sensors, huh?
أفخاخ بحسّاسات أشعّة تحت الحمراء إذاً؟
Eine Infrarotsensor-Falle?
¿Trampas con sensores infrarrojos?
¿Trampas con sensores infrarrojos?
Des rayons infrarouges
activent les pièges.
Trappole con sensori a raggi infrarossi, eh?
Armadilhas com sensores infravermelhos?