Five years ago, humanity’s peaceful existence was shattered in a single day by the onset of the Great Catastrophe. Across the globe, apocalyptic spaces known as Special Zones—each ranked from level 1 to 100—began appearing at random. Humanity was thrust into a struggle for survival. Driven by the desire to achieve the legendary feat known as the Grand Slam—clearing all 100 Special Zones—Maya Ichijo fought tirelessly. But just before reaching her goal, she was betrayed by her own comrades in the final zone and left to die. Overwhelmed by regret in her final moments, Maya loses consciousness… only to awaken in a world before the catastrophe ever began. Given a second chance, Maya swears vengeance. The real monsters aren’t the zombies—but the people who betray you when you need them most. Armed with future knowledge and burning resolve, she sets out on a bloody path of revenge, survival, and retribution.

Official Translations:
Japanese