Jinki: Extend

Aoba is a girl who enjoys assembling robot models. She used to live with her grandmother, but after her grandmother's death, she is taken to a hidden facility. There, she stumbles upon a massive robot. Piloted machines battle mysterious entities called "Ancient-Jinki" in a place known as The Grand Savanna, though the reasons for these conflicts remain unclear. Determined to uncover the truth, Aoba dedicates herself to working at the base, hoping to one day operate a robot and learn the secrets behind these fights.