Aired: Oct 2, 2001 to Mar 26, 2002
Genres: Action, Adventure, Fantasy, Sci-Fi, Shounen
Rating: PG-13 – Teens 13 or older
MAL: Final Fantasy: Unlimited
Ai and Yu, after reading their parent's research and after their parents' disappearance, they decided to go on search for them. They ride a strange train to the Inner World in search of their parents and meets up with Lisa in the train and together they begin their journey within the Inner World.