Okada Toshio

Hundreds of years after the top forces left for the center of the galaxy, the Earth Army, whose science and technology has declined, and the Sirius Army, who have built a spiritual energy civilization with the descendants of immigrants, continue to fight between humans. Takeshi Sawamura, whose father is a refugee from Sirius, meets two beautiful girls in the S-TOP unit on Earth, but their true identities are space monsters... a sequel to Gainax's OVA "Aim for the Top! The prologue was published in Comic Gunbuster.