Ancient Girl's Frame - S01

By the end of the 21st century, the discovery of a new energy source called "DG energy" (short for "divine grace energy") had transformed Earth's economy and made it possible for humanity to colonize space. But when the first expedition reaches Pluto, it is attacked by a mysterious giant life-form known as "Nergal." The Earth Alliance Army fights back by building an "AG Unit" from ancient robot weapons called the "G's Frame," excavated from archaeological sites around the world. Girls with special abilities known as "Ancient Girls" can pilot these robots against the Nergal. But the first AG Unit takes heavy losses in the Jupiter Trojan campaign, and the pilot of Unit 04, Minamiya Reiu, goes missing in action. Years later, Minamiya Reika, Reiu's younger sister, joins the AG Unit to search for her sister and protect Earth from the Nergal. What follows is a story of friendship, ancient robot weapons, and battles to the death with the Nergal.