Ultraman: I Will Fight in Gundam Form!

Hayata Susumu, transported to the aftermath of the original Ultraman series, initially thought he was on the path to Ultraman, but a group of scientists suddenly appeared and captured him for experiments, claiming he was Ultraman's human host. Just when he thought he was on the path to Ultraman F, the scientists found nothing on him and had no choice but to let him go. As he decided to live as an ordinary person, a new crisis confronted him. Seeing the mechanical Ultraman created using human science, and King Joe closing in, Hayata Susumu realized: he was on the path to Gundam! This is a story about humanity protecting the Earth through its own efforts after Ultraman's protection is gone.