The Star Ocean: Blue Sphere manga is a seven-volume series written and illustrated by Mayumi Azuma. It is a continuation to the The Second Story manga, but since it prematurely ended before introducing Noel Chandler and Chisato Madison, neither character exists within this storyline. It was serialized in Monthly Shōnen Gangan.
366 SD, a malevolent organization, "The Ten Wise Men", manipulated the Crest of Annihilation in an attempt to destroy the entire universe. Their aspirations were crushed by the heroes' actions across many planets, and the Ten Wise Men were defeated. The Universe was at peace once again. Thereafter, the heroes decided to go their separate ways. And two years later...
Precis and Leon are studying abroad on Earth. Then one day, they received an SOS from Opera Vectra and Ernest Raviede, saying that they had crashed on an underdeveloped planet. And the both of them, gathering some old friends, set off to Edifice to rescue them. But what they will find there will lead them on another adventure in which they will need to save a planet, and possibly the entire universe once again.
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- Volume 1 - August 22, 2002 - ISBN 978-4757507647
- Volume 2 - February 22, 2003 - ISBN 978-4757508750
- Volume 3 - July 22, 2003 - ISBN 978-4757509849
- Volume 4 - November 22, 2003 - ISBN 978-4757510692
- Volume 5 - March 22, 2004 - ISBN 978-4757511699
- Volume 6 - October ?, 2004 - ISBN 978-4757512955
- Volume 7 - May 21, 2005 - ISBN 978-4757514300