This is a story set in the far-off future. In the wake of the catastrophe known as the Great Disaster, humans could no longer remain on Earth, and fled into space to avoid extinction. A new age had begun in unexplored skies, and a new space calendar (S.D.) was instituted. Time passed, and now we've reached the year 1484 S.D. Colonies orbit Earth's moon and Mars. Human beings have found a way to sustain themselves in outer space. Footsteps of pioneers could be heard as they echoed past Saturn. Technology advanced and people molded their environments to make them inhabitable. The advent of rounders revolutionized life in space, allowing people to paint the very skies themselves. Senko no Ronde is a tale of rounders and their pilots.
Within the Arria Federation a weapon of mass destruction was stolen along with a terrorist attack.
Following the Secret Weapon Heist, it became apparent that the Arria Federation was in possession of a weapon that violated international law, and they immediately receive spacewide condemnation. Over time the balance of power within the Federation begins to fall apart, and there come to be whispers of secession.
In the midst of that turmoil the figure of Luchino Narukami emerges. As a member of the Narukami family, which is currently in power, he garners sympathy as a victim and begins his ascent. He is young, charismatic, and a beacon of change. He promises a new age for Arria, which wins him remarkable favor on the international stage.
But then something happens... An armed conflict arises in the Arria Federation's Martian colony, Harmonia. Word that Luchino Narukami has orchestrated the fight begins to spread.
1486 S.D. Our story begins...