美少女戦士セーラームーン -- Pretty Soldier Sailor Moon, by Naoko Takeuchi, is a five-part series revolving around the reincarnated defenders of a kingdom that once spanned the solar system, and the evil forces that they battle. As the story progresses, Usagi learns more and more about the enemies she faces, the evil forces trying to destroy the world, her own past life, her destined true love, and the possibilities for the future of the solar system.