Amami Kurau’s father is a chief scientist researching alternative energy. As an apology for having to work on her birthday, Kurau is invited to watch one of his experiments. When that experiment goes wrong, Kurau is possessed by a Rynax, an odd being made of light energy that lives in pairs. The Rynax informs Kurau’s father that Kurau’s body is necessary for she and her pair to recover. Kurau’s father is desperate to have his daughter returned, promising to help the Rynax reawaken her pair.Ten years after that event, Kurau and her father are living separately, with the possessed Kurau taking on dangerous jobs with the special abilities granted to her by the Rynax’s powers, making a living as an agent.Just as her pair awakens and Kurau decides not to take on any more dangerous work, so as to live quietly with her pair, the GPO, a government police force, notices her existence and moves to capture and harness her and her pair’s abilities…