Gaiarth - a world devastated by a cataclysmic war, where pockets of humanity struggle to survive amidst the wreckage of technologies made magical by ignorance. Gaiarth - a world where artificially intelligent machines doggedly pursue their programmed imperatives: to protect, or destroy, humanity. Gaiarth - a world in which an old and terrible evil has reawakened, threatening to once again bring forth Armageddon! (Source: AniDB)

Manami is your typical schoolgirl, despite the odd machines her grandfather is always building. One day, though, an odd evil robot comes to attack Minami's school, and commits the ultimate offense of threatening her friends... and ruining her lunch. Now, she will stop at nothing to return order to the world in her grandpa's newest creation: the mecha Del Power X.