In a futuristic Japan shattered by war, four dominant nations vie for supremacy, utilizing powerful humanoid mechas known as AMAIM. Amidst this post-conflict era, 16-year-old orphan Amou Shiiba revives a dormant AMAIM called Kenbu, and encounters Gai, an AI seeking energy. Their alliance thrusts them into chaos, branding Amou a terrorist and outcast. Undeterred by society's rejection, Amou takes a stand against oppression, embarking on a perilous odyssey marked by adversity and camaraderie. His mission transforms from personal survival to championing the liberation of his people.