After Colony (A.C.) 195. Mankind has moved into space. Thousands of people live on giant orbiting space colonies called "Sides." However, the Earth Government, which rules the colonies, is unjust and cruel. A group of revolutionaries builds five robotic weapons called Gundams and plans to send them to Earth to begin their fight for independence. Piloted by five young men, these Gundams carry the hopes and dreams of freedom of the colonists with them as they descend to Earth to begin Operation Meteor!

The year is 2040 and the galaxy is flourishing with several colonies and advanced technology. AI is near perfection and the current top idol is the near-completed Virturoid Idol Sharon Apple. All that is missing are her actual feelings, which instead are supplied by Myung Fang Lone. Sharon's debut concert is on planet Eden, where at the same time, fighter pilots Isamu Dyson and Guld Bowman battle over air superiority for the Supernova Project. Isamu, Guld and Myung were once childhood friends, but after an accident seven years ago, they went their own separate ways. With Myung back in the picture, the old disputes are once again awakened. And when an unstable and illegal AI technique is installed in Sharon, the situation is worsened.

On planet Amoi, a great society has developed, creating a computerized city called Tanagura, ruled by supercomputer Jupiter. The populace is almost entirely male and is based on hair color; silver and/or blonds are the elitist, ending with dark/black haired as the bottom of society, often known as "mongrels". Blondies keep "pets", young boys kept for a few years, especially made for performing sexual actions for the Blondie's voyeurism entertainment. Blondies aren't suppose to keep pets for long or interact sexually with pets, but one blondie named Iason Mink has kept a pet named Rikki, for years and is rumored to sleep with him. Iason refuses to let go of Rikki, even with Jupiter's disapproval. Rikki fights with his emotions and society problems, unable to decide what to do about his old friend/lover Gai (Guy) and their gang. Iason is obsessed with keeping Rikki, and Rikki doesn't know what to do; fight against him or surrender to him.

The hyperactive teenage scuba diver, Hikari Kohinata, lives in a small town near the sea. On her first day of high school she meets the shy transfer student, Futaba Oki, who is struggling to find a place after moving away from Tokyo. Hikari takes the lead, dragging Futaba into her hijinx, and the two soon become close friends