This OVA is basically a one-hour promotion that glazes over a small early portion of the manga, which is a huge space opera epic. Since the manga\'s so huge, it was imaginably hard to cram even an introduction of it into 1 hour without confusing the heck out of people, so it\'s pretty confusing. But from the little I\'ve seen, it\'s just about various things that go on in this space world where battles are fought with machines called Morter Heads (EVA CLONE...EVA CLONE!!!), piloted by soldiers called Headliners with the assistance of robotic chicks called Fatimas. And then it goes on to depict the starts of all of the storylines that the manga\'s carried on through dozens of volumes in more detail, including some sort of Morter Head competition, and some romance thing with a girl named Lachesis who gets turned into a Fatima by her father or something like that. I can tell it\'s great if you\'ve read the manga, but just a little too esoteric if you haven\'t.