Simon is a timid boy who has no special abilities except for a knack of drilling underground. Kamina is the polar opposite - reckless and bold and with an incredible sense of self-confidence, he strives to go to a place where there is no ceiling and freedom truly awaits. As they toil in an underground village oppressed by a village chief who disregards anyone who challenges his authority, a gargantuan Gunmen piloted by a Beastman invades the village from the surface. Kamina sees this as his big break to reach the surface. However, what else will he and Simon encounter up there in a world where mankind is under the iron fist of the Beastmen and their Gunmen, led by the mysterious Lord Genome?
Elenco: Marina Inoue , Kishō Taniyama , Kana Ueda , Kana Asumi , Tetsuya Kakihara , Katsuyuki Konishi , Daiki Nakamura , Yukari Fukui , Nobuyuki Hiyama , Akio Suyama , Haruhi Terada , Kiyoyuki Yanada , Masaya Onosaka , Michiko Neya , Mitsuki Saiga , Takahiro Mizushima , Takako Honda , Takashi Kondō , Takaya Kamikawa , Rina Satō , Takahiro Mizushima , Takako Honda , Daisuke Kirii , Kiyoshi Kawakubo , Go Shinomiya , Takafumi Kawakami , Shizuka Ito .