Wistario Afam is a cheerful and resolved young man from Radonitsa Colony, a penal settlement floating above Venus that blends suburban and medieval architecture. Orphaned early, he inherited his parents' colony management company, Afam Equipment, and is cared for by Demnar Kitako Jr., a military veteran who secretly maintained the Gundam Hajiroboshi mobile suit.

Inspired by news of Tekkadan's deeds on Mars, Wistario dreams of transforming Venus into a tourist destination and improving life for its inhabitants. His path changes when he meets the soft-spoken, emotionless guide Coronal Xhosa, who greets him with “Gratulatio! Congratulations” and identifies him as qualified for the Urdr-Hunt—a competition with a prize valuable enough to purchase an entire colony.

Through this event, Wistario pilots the Gundam Hajiroboshi, a recommissioned Calamity War-era mobile suit originally named Gundam Marchosias, now equipped with a large sword and renamed for its connection to Venus. He leads Afam Equipment with a friendly rivalry toward the group Foundling, collaborating when necessary and preferring to avoid lethal force, often allowing former enemies to retreat.

The Urdr-Hunt and its central mysteries remain unfinished.