Including the Class F's Shinzo Wataru, all 6 classes of first year students was teleported to a mysterious labyrinth with the school's first floor.
For a first timer, it's a dungeon filled with deadly traps and violent monsters. But for Wataru, it looked strangely like the classic 3D Dungeon RPG, "Genocide Reality", and he had mastered everything about "Geno-Real".
Even if it was Difficult Ranked "S" game, it's nothing but a simple pastime for him. To escape the murderous labyrinth, he departs from his friends and the group to head off to the deepest part by himself. To enjoy this death game.
