Handsome high school student Akemi is a computer genius. One day a new girl, Yumiko, transfers to his class from another school. She quickly falls in love with Akemi but, absorbed in his computer, he pays her no attention at all. Akemi accidentally summons demons who wreak chaos on his enemies and friends.

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; anyone silver/blond are the elite, with dark/black hair as the bottom of society, often known as "mongrels". Blonds have "pets", which are usually young boys kept for a few years, who are especially made for performing sexual actions for the Blond's voyeurism entertainment. The pets are not supposed to be kept for long, nor are Blonds allowed to interact sexually with them; but one Blond, named Iason Mink, has kept a pet for years. Mink is also rumored to sleep with his pet named Riki and refuses to let go of him; despite Jupiter's disapproval. Riki 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 Riki, and Riki doesn't know what to do; fight against him or surrender to him.

A new threat makes its appearance on Earth. GGG - with Guy Shishio and the newly-constructed GaoFighGar - team up with their French counterpart Chasseur to battle the Eleven Kings of Sol.

Yugi Muto, a shy boy who loves all kinds of games, one day solves an ancient puzzle known as the Millennium Puzzle, causing his body to host the spirit of an ancient pharaoh.