At 21, Tetsuro Okino lands a coveted spot at Habuto Kogyo, a corporation employing massive robots to battle monsters. With a lifelong fascination for robots, the chance to pilot them fulfills his dreams. However, his enthusiasm falters upon discovering the company's precarious state. The exorbitant costs of firing a single missile shatter his idealistic views, and the conflicting decisions leave him in a perplexing predicament.