While searching for the legendary Mapman, the last surviving member of the Nomad Star tribe, Lipumira finds him in Tokyo. His name is Gen Tokishima, and he is the only one capable of retrieving a part of the starmap hidden within the Earth. After obtaining the piece, Gen must decide whether to follow Lipumira on her reckless quest to find the remaining parts of the starmap or stay on Earth. He makes his choice, only to discover that his girlfriend has beaten him to the spaceship because she wants to come along as well. Unfortunately, as Gen learns the secret of the starmap, Lipumira's sisters have plans to stop her and will do so at any cost.