Every three hundred years, there will be a battle between the dancing girls started by the Lord of Obsidian. During the battle, the dancing girl (HiME: Highly-Advanced Materializing Equipment) (highly materializing ability) needs to defeat the ORPHAN and his companions, and become the only winner among many HiMEs, and finally get the power bestowed by the Lord of Obsidian: "Yuanxing". HiME will rely on their different elements and children to fight. Some have considerable combat power, while others can only be used for reconnaissance intelligence. Conceptually, HiME has the right to choose whether to use abilities in any situation. However, to put it bluntly, just like the song of Golden Angel, they are just girls in a cage, unable to get love smoothly and find it difficult to maintain friendship.