Reideen

The discovery of his missing father's remains takes high-school student Junki Saiga to an ancient site. When a mechanical attacker falls from the sky, a strange bracelet links him to Reideen, a golden giant buried within the ruins.

Junki can now wield power that ordinary weapons cannot match, but its origin and intentions remain obscure. Between school and increasingly dangerous attacks, he works with the authorities to defend his world while searching for the connection between Reideen, his father and the enemies that keep arriving.