ravex in Tezuka World is a oVA anime that premiered in spring 2009, produced by Tezuka Productions.

About the production: there is 1 episode of about 18 minutes and its current status is "finished".

Its main genres are music, with themes such as Band, Aliens, Crossover and Musical Theater.

On AniList, ravex in Tezuka World has an average score of 53%, an average score, and appears on 608 users' lists.

As "another story" set after the end of the original manga, this what-if "Return" plot depicts what happens to the title character after his final act to save Earth. After drifting in space, the robot boy is rescued by the three members of ravex, and he is miraculously revived — not by Tezuka's Black Jack surgeon character, but by "Space Jack." The newly evolved robot boy will be named "Ratom." The Princess Knight and other Tezuka characters will appear in this all-new story. Musical artists BoA, Maki Goto, Anna Tsuchiya, Tohoshinki, and TRF are contributing to the album, and an event is planned at Tokyo's National Museum of Emerging Science and Innovation on April 10. The album marks Avex's 20th anniversary and what would have been Tezuka's 80th birthday. (Source: Anime News Network)

Official synopsis from AniList.