Message from Space

(From ebookjapan):The planet Gilucia belonged to a certain stellar system on the frontier of the Andromeda Nebula. However, it was dying, ruled by the space invaders, the Gabanus aliens, a race of steel. When Chief Kiddo prayed to the Spirit of Cosmic Creation for a miracle of salvation, the holy eight riabe fruits flew into the air. And the riabe fruits chose eight heroes of the Galactic Earth Tribe. The eight warriors did everything in their power to fight the legions of the Gabanus, but because of their efforts, the "Earth" was targeted by the Gabanus. ......?