Ancient Girl's Frame

By the end of the 21st century, the discovery of a new energy source known as "DG energy" ("divine grace energy") has transformed Earth's economy and enabled human colonization of space. However, when the first expedition reaches Pluto, it is attacked by a mysterious, giant life-form called "Nergal." In response, the Earth Alliance Army develops an "AG Unit" using ancient robot weapons known as the "G's Frame," which were unearthed from archaeological sites around the world. These weapons can be piloted by individuals with special traits known as "Ancient Girls." Despite their efforts, the first AG Unit suffers heavy losses during the Jupiter Trojan campaign, and the pilot of Unit 04, Minamiya Reiu, is declared missing-in-action. Years later, Minamiya Reika, Reiu's younger sister, joins the AG Unit to search for her sister and defend Earth from the Nergal. The story follows Reika as she experiences themes of friendship, ancient robot warfare, and deadly battles against the Nergal.

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