Apocalypse Zero

A world ravaged by natural disasters has left society in ruins, forcing the few survivors to do whatever it takes to stay alive in the chaos. Among them is Kakugo, a young boy whose late father entrusted him with extraordinary martial arts abilities and a powerful suit of armor. His mission is to restore safety-at least within his school, if not the world. But his sister, armed with the same skills and armor, has a different plan: she believes the only way to bring peace is by eliminating humanity itself.