You're watching a game's marketing material that treats world-building like it matters more than selling you anything. Four episodes of pure sci-fi setup, no tutorials, no hand-holding, just a kid discovering he can captain a ship in a lawless corner of space and deciding to actually do it. GONZO and Production I.G. pouring studio craft into a promotional short means every frame is trying to make you care about a universe that exists somewhere else, on another platform, in another medium entirely. The ONA never explains what it's setting up. It just shows you the first person to say yes to something dangerous, then cuts to black before you get comfortable. That's not marketing. That's a dare.
Yuuri is a young man who sets out across a lawless stretch of space and rises to become the captain of a spaceship. His journey is bound up with the Epitaphs, mysterious artifacts found throughout the universe, and he wants to uncover what they are ultimately for. The four animated shorts were produced by GONZO and Production I.G to promote Sega's science-fiction roleplaying game for the Nintendo DS and to flesh out its world and story. The first episode debuted at the Tokyo Game Show in 2008.