Hiroshi Shiba is an outstanding car racer whose father is assassinated upon the discovery of the Bronze Bell from an ancient civilization. This Bronze Bell is coveted by Queen Himika who comes from that ancient era; the Yamatai Kingdom, and whose ambitions are to seize the Bell and dominate earth. Hiroshi is left with a few items from his father which would enable him to morph into a full sized mecha warrior, the Steel Jeeg. With these abilities and the help of his father's brain implanted in a computer and his assistance Miwa "Micchi" Uzuki, they set out to neutralize Himika's plans of world dominion.

This work focuses on environmental issues from the viewpoint of insects. In a refreshing twist, the central character miniaturizes, unlike the conventional hero who grows ever larger. From this perspective, the world looks different and unfamiliar. This work enables the reader to see that the world around is quickly moving towards destruction. (Source: en.tezuka.co.jp)

Short specials involving the characters from the main series.

Due to spacecraft failure earthlings Ryu with computer robot "MOS" landed on self-navigated planet Gdleen. There Ryu meets a cute Euradonian fairy Fana. At that time, the planet was in the midst of a dispute over a Gavana temple. Self proclaimed God Gavana captured Fana for a sacrifice. Would they be able to escape? And what the identity of Gavana?!