Battle Ground Workers

A 30-year-old man without a job named Jinichirou Taira gets a letter instructing him to battle an unidentified living creature. He must take on this unexpected role, operating a new type of mechanical armor known as "RIZE." The designation "RIZE" is chosen because they are considered the only chance left for humanity's survival. Positioned at the front of the conflict, he is destined to protect the world while remaining unknown to others.