Mark of the Firefly

Nothing much of interest ever happens in Yamaguchi's little scrap town on the outskirts of the habitable continent. Just scavenging and sales. So, when his long-time friend, Kageyama, bursts through Yamaguchi's door in a panic brandishing a magnificent object branded with the Mark of the Firefly, a wealthy neighboring empire, he doesn't have much of a choice but to leave town.