Hades Project Zeorymer

Akitsu Masato discovers he's been part of a government project called "Last Guardian" since birth. His real purpose is to pilot the zeorymer robot, Zeorymer of the Heavens. As he learns the truth about his past, Masato finds himself at odds with an organization called Hau Dragon, which seeks to resurrect its plans for world conquest. The group had previously built eight powerful robots, but Masato's creator, Kihara Masaki, destroyed all but Zeorymer, and now Hau Dragon is trying to complete the set by capturing Masato and the last remaining robot.