For Renton, every days the same. Nothing happens, nothing changes. He goes to school, he goes home. Nothing exciting ever happens to him. Until one day, a giant mecha called an LFO comes crashing down on him literally. And inside is the most beautiful girl he has ever seen! The thing is, though, the girl, named Eureka, is on the run from the military with her stolen mecha, and shes brought trouble with her.