Synopsis
Sixteen years after a meteor wiped out the original city, Graviton City has been rebuilt into a futuristic metropolis. But superpowered high school student Eiko Magami couldn't care less—she only worries about her best friend Shiiko Kotobuki and making it to class on time. The problem is that genius Biko Daitokuji has her sights set on befriending Shiiko as well, and she's willing to do whatever it takes to replace Eiko as Shiiko's closest companion. To make that happen, Biko decides she must defeat Eiko in a fight. Knowing Eiko's incredible strength and speed, Biko builds a mecha and challenges her right at the school gate. As their battle begins, an enormous spaceship appears over Earth, searching for something left behind.