Chapter 62
The manga tells the story of what happens up until the birth of Astro Boy and is considered an "episode zero" story.
Chapter 7
Set in 2020, Rideback tells the story of a college student named Rin Ogata and her "iron horse" robot motorcycle (rideback) called "Fuego", in a tumultuous time of anti-government student protests.
Chapter 6
Short manga volume with soft yuri stories. The action takes place in the near future in a pilot training school full of girls only. They train on robots named Tandemine which are controlled by two persons each one.