Before the Catastrophe, I Strike First

Strange reality-bending anomalies have swept across the world, bringing with them a deadly labyrinth governed by harsh rules of survival. Anyone who fails to understand these rules is likely to be lost, and ordinary life has become a constant gamble. Facing this deadly new order, the heroine refuses to wait for disaster to arrive and decides to take the offensive, turning the labyrinth's own dangers against those who would threaten her.