The My-HiME manga follows the story of Yuuichi Tate, a recent transfer student to Fuka Academy. At Fuka, he finds out that he is the Key - the person needed to unlock greater powers - to two HiMEs, Mai Tokiha and Natsuki Kuga. The manga covers Yuuichi's relationship with the two girls as well as their battle against an organization attempting to take the power of the HiME Star for themselves.