In 2061, Japan is under a state of occupation by multiple states. The world, including Japan, has been consolidated under the rule of four trade blocs. The entire archipelago is now the frontline of conflict. The Japanese people live under a state of constant occupation and oppression, with humanoid war machines called AMAIM patrolling its streets. A young introverted boy named Amō Shiiba has a chance meeting with the autonomous AI Gai, and his acquisition of the AMAIM Kenbu begins a story that will see him attempting to take back Japan. Gashin Tezuka is a reticent and frank 16-year-old member of the Japanese resistance who pilots the AMAIM Ghost to avenge his father.

Im Jahr 2061 ist Japan erobert. Von den vier Hauptwirtschaftszonen der Welt unterteilt und regiert, erfahren die Japaner als Bürger einer untergeordneten Nation tagtäglich Unterdrückung. Japan wird zur internationalen Frontlinie, wo die humanoiden autonomen Sonderwaffen der vier Wirtschaftszonen, genannt AMAIM, herumlaufen. Eines Tages begegnet Shiiba Amo, ein technikverrückter Junge, der selbstdenkenden KI „Gai“. Infolgedessen verschreibt er sich dem Kampf, um Japan zurückzugewinnen – an Bord seiner selbstgebauten AMAIM „Kenbu“.

In the continent of Cruzon, an impending war between the Kingdom of Krisna and the nation of Athens is brimming. The people of this land are able to use quartz for whatever purpose they desire. Yet one person, Rygart Arrow, is not. He is an "un-sorcerer," a person unable to use quartz. But this characteristic will enable him to pilot an ancient Golem, one strong enough to put up a fight against the invading army of Athens.