A foreign woman named Maya crashes onto Earth. Her planet was razed by the Blasters, a ruthless alien species that plunder other worlds for vast abundant resources. She falls for a researcher and bears a human son named Kentaro together in hope always. When the Blasters assault Earth, Kentaro must vanquish them by battling Astroganger, a living-metal robot with his unbreakable shield at.
Toei Animation 
Knack Japan