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Episode 17: Frog: The Smallest Great Adventure
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)
Status: Completed
Season: Fall 2001
Score: 57%
25 Episodes
Action
Adventure
Fantasy
Sci-Fi