The protagonist of the story is Photon Earth, a kind and youthful lad blessed with extraordinary strength. Unfortunately, his mischievous pal Aun Freya put a label of "Baka" on his forehead. However, fate takes an unexpected turn when he, in retaliation, composes the same word on the forehead of the captivating outlaw aviator Keyne Acqua. Soon, Photon realizes that his concerns extend beyond his impromptu engagement to Keyne. He is tasked with protecting her and her accomplice Aun from the evil Papacharino, whose sole purpose is to pilfer the sacred knowledge of "Aho" energy from Keyne's grandfather's vessel.