Summary:
In a land called 'Guardia', a young sky thief by the name of Coud Van Giruett, stumbled upon a human-like girl sealed in a box. The girl, Ren, was an "Eden Raid", beings which were able to become weapons for their "Eden Raid Pleasure", or human partners. Later, joined up with Cisqua, Rowen, and Kuea, who are members of Arc Aile, an organization where they try to keep all Eden Raid's happiness, the five of them set off to go to a part of Guardia that was never thuroughly searched: the Garden of Eden. Through many dangers and troubles, the group go on their adventure to this unknown land.
