Tengen Toppa Gurren Lagann Movie 1: Gurren-hen

Simon has known only the underground village of Giha until the fearless Kamina pushes him toward the surface. With Yoko and the mecha Lagann, the two break into a sky ruled by Beastmen who force humanity to live below ground.

Their rebellion grows from a reckless escape into a movement. Combining machines, gathering allies, and suffering painful losses, Team Dai-Gurren drives toward a confrontation that will determine whether humans can finally reclaim the surface.