World trial

A sudden and silent wave of power hits the the lower world of mortals.
Naoto Rei is a genius high school student who lives with his adoptive parents. One day he suddenly wakes up in a unusual room where he has to clear a task to survive or he will be killed.
Is this a fortunate incident or...

Prompt: When the Clock Strikes Midnight
Theme(s): #Supernatural
My Theme(s): #Survival action #Intelligent protagonist