Marg spends his entire life chasing one thing: his brother back. When they finally meet, they're pointing guns at each other, and the show doesn't flinch from that devastation. A single OVA that understands the cruelty of reunion, where getting what you wanted most becomes the thing that destroys you.

Marg lost his parents, and the dictator Zure took his younger brother Mars from him, leaving him to live alone on the planet Gishin. He joins a guerrilla group rising up against Zure's rule and falls in love with the daughter of its leader, Ura. The organization is eventually destroyed. Marg falls into Zure's trap and is brainwashed into serving as a soldier. His long-held wish to see his brother again finally comes true, but only when the two must face each other in a duel. This single mecha OVA retells Marg's life on Gishin and gives Gaia, God Mars and the Gishin robot Zeron new designs.