Akino Murata

In a future, decimated Earth after the discovery of a mysterious, alien spacecraft dubbed "Orphan". A group of researchers scour the planet for Orphan's disc plates using mecha called "Antibodies" in order to revive the craft, an event that would result in the utter destruction of all lifeforms on Earth. The protagonists Yu Isami and Hime Utsumiya must utilize a special Antibody called "Brain Powerd" to counter the Orphan plans and save humanity.

It is the Correct Century, two millenniums after a devastating conflict which left the world broken. Earth is now mostly uninhabitable, and thus a remnant of humanity has resided on the Moon while the Earth and its few survivors recover.