Final Fantasy: Unlimited
FF:U - Final Fantasy: Unlimited ／ FF:U -ファイナルファンタジー:アンリミテッド- ／ FF:U ~ファイナルファンタジー:アンリミテッド~ ／ FFU ／ Final Fantasy Unlimited ／ Последняя фантазия: Всемогущий ／ ファイナルファンタジー：アンリミテッド
Description
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. (Source: Anime News Network)