Zegapain is a tV series anime that premiered in spring 2006, produced by Sunrise.

About the production: the story comes from an original script, there are 26 episodes of about 23 minutes and its current status is "finished".

Its main genres are action, mecha, romance and sci-fi, with themes such as Isekai, Artificial Intelligence, Real Robot and Super Robot.

On AniList, Zegapain has an average score of 70%, a good score, and appears on 9,561 users' lists.

The franchise continues in or follows from: Zegapain STA and Zegapain ADP.

Kyo, an avid swimmer tries his best to keep the high school swimming club going, which is pretty hard when he's the only member. Facing the prospect of the club being closed by the student council, he tries to enlist beautiful Misaki to act in a promo video, shot by his good friend Ryoko, in a bid to start a recruitment drive. She agrees but only if he pilots a mecha under the wing of Celebrum, a resistance organisation fighting to destroy Deutera Areas formed on Earth by the aliens Gards-orm. He agrees but finds it all strangely familiar as if he's done it before... (Source: Anime News Network)

Official synopsis from AniList.