The three revelations delivered by the Autonomous Interstellar Object from another galaxy ushered in an age of unprecedented prosperity, allowing humanity to expand across the entire solar system.

Gravity Control. FTL Communication. Cognitive Materialization. Yet less than ten years after its discovery, the Object that had delivered these three revelations suddenly ran rampant, spawning an aggressive, self-proliferating ecosystem. Humanity came to see this unknown ecosystem as the Apocalypse.

For three months, humanity fought the Apocalypse to a standstill in orbit above Earth. Forced to abandon the planet, humanity marked that year as A.A. 1—the first year After Apocalypse. By A.A. 45, children born on the Moon and in space colonies have never known life without the Apocalypse. And on the lunar surface, a boy named Azumi Ray awakens—

(Source: Official site)