Also known as: AOZ, アドバンス・オブ・Z
A Zeta Gundam spin-off showing earlier development and Prototype Designs of the Titans Mobile Suit Mecha. It has mechanical designs by Kenki Fujioka.
It was serialized in the monthly publications Dengeki Hobby Magazine as a photo-novel and in Dengeki Daioh as a manga from 2002 to 2008.