This "Return" plot is a "what-if" scenario that takes place after the original manga's conclusion. It shows the title character's journey after his final feat to save Earth. The robot boy, who has been drifting in space, is rescued by the three members of ravex and brought back to life, not by Tezuka's Black Jack surgeon character, but by "Space Jack." He is given the name "Ratom" as he evolves into a new form. The story will also feature well-known Tezuka characters like The Princess Knight. An incredible lineup of musical artists including BoA, Maki Goto, Anna Tsuchiya, Tohoshinki, and TRF have contributed to the album. On April 10, an event will take place at the National Museum of Emerging Science and Innovation in Tokyo. The album marks Avex's 20th anniversary and would have been Tezuka's 80th birthday.