The series is set in 2999 AD, where two factions—TERRA and NESS—are engaged in a space war game to control planets.

They fight with spaceships, which have been made to teleport their pilots back to the mother ship upon destruction.

She is a hardcore gamer, preferring space fight simulations, and is occasionally bribed using games.

Later Yohsuke appears in the series in the guise of a man, and joins Madoka's class on the last day of school.

The first OVA series was directed by Akiyuki Shinbo with character designs by Kazuto Nakazawa and music by Tomoki Hasegawa, and produced at J.C.Staff.

For the series, Shinbo wanted to have a more "realistic" approach to the characters while still keeping their "cute" qualities and had found out about Watanabe's work while doing research.

[3] He asked J.C.Staff animation producer Yuuji Matsukura to offer the role of character designer to Watanabe; and Watanabe, who knew about Shinbo and was a fan of his directorial debut Metal Fighter Miku (also produced by J.C.Staff), accepted the job.

[3] As pre-production started, Shinbo gave up his New Years' vacation in order to storyboard the first episode.

[3] Watanabe noted difficulty as both a first-time character designer and chief animation director in-part due to the fact that he had trouble understanding different lenses and perspectives that Shinbo liked to use (such as wide angles, bird's eye views, and worm's eye views).

[4] In recommendation, assistant director Kaneko suggested that Watanabe watch the works of Akio Jissoji to better understand the concepts.