Teppei fights against the Machine Empire in order to save humanity.

Teppei goes after his brother, but gets hurled into a desert and almost killed; beneath the scrapyard, Teppei meets a mysterious machine.

Teppei fights against the Machine Empire in order to save humanity.

X keeps insisting that his true donor to be Karen, from whom he parted with five years earlier, and won't give Teppei the time of day.

Teppei fights against the Machine Empire in order to save humanity.

A sudden attack by the Crow Intelligence Squad of the Empire of Machines.