If It Weren't for You - S2.E19

Their battle with the Alus Earthree Gundam has ended in victory for Hiroto and the Build Divers. In front of its wreckage are the Earthree Gundam and the Beam Shoot Rifle U7, which has been thrust into the ground. As Hiroto stares at the rifle which looms like a gravestone, a buried memory is revived within the depths of his heart.