Season 1 of Megazone 23 premiered on March 5, 1985.

Motorcycle enthusiast Shogo mistakenly comes into possession of a government prototype bike. Pursued by ruthless goverment agents he plans to save himself by exposing the bike to the public on a live TV show hosted by a popular singing star. But, even the lovely Eve has secrets of her own and the government has much more to hide than just a transforming military motorcycle. As Shogo begins to unravel the mystery of the bike, he discovers a reality-shattering secret about the city and the world he thought he knew.

Season 2 of Megazone 23 premiered on April 26, 1986.

The Dezalg have returned with a new, horrible weapon and unleashed it on Megazone 23's defenses. Believing their salvation is also in new weapons, B.D. is again bent on breaking the EVE's final protection level.Full control of Megazone 23 would mean unfettered weapons development. Shogo, meanwhile, has tried to return to a 'normal' life; Hanging out with his biker gang, "Trash" and his girlfriend, Yui. But, his convictions about the Megazone's shadow government policies haven't changed and when EVE calls for his help, he discovers where the Garland bike has been hidden. It's showdown time for Shogo and B.D., Trash and the military, as well as the Dezalg and Megazone. However, EVE's final secret, A.D.A.M., may mean no one will survive.

Season 3 of Megazone 23 premiered on September 28, 1989.

Years after the events of Megazone 23 II, the only city on Earth is the supposedly idyllic Eden. There lives Eiji Takanaka, a B Level hacker who has just been accepted into EX, the organization that controls Eden. However, before his first day on the job, he becomes embroiled in a network war, a legendary figure named EVE, and a plot to re-inhabit the Earth.