In the continent of Cruzon, an impending war between the Kingdom of Krishna and the nation of Athens is brimming. The people of this land are able to wield the crystals from the ground for whatever purpose they desire. Yet one person, Lygatto Arrow, is not. He is an "un-sorcerer", a person unable to wield the crystals. But this characteristic will enable him to pilot an ancient mecha, one strong enough to put up a fight against the invading army of Athens.
Mamezo, Usagi's longtime friend and companion, accompanies her on her trip to Segachi. Once they arrive it becomes apparent that Hanzō has no intention of marrying anyone, and worse yet, it seems Usagi has a much more refined rival. It is clear that as Usagi spends more time with Hanzō, she is growing on him, though the fact that he is constantly bombarded with new potential brides makes Usagi self-conscious.