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 mu*derous labyrinth, he departs from his friends and the group to head off to the deepest part by himself. To enjoy this death game.