The series follows Kotaro who is stranded on an uncharted island inhabited by strange talking animals and has no memory of his past.

Once, on an unknown southern island, a battle was waged over two mysterious stones, one red and one blue.

Finally, the battle came to an end, and the young one who possessed the power of the blue stone fell into a deep sleep.

The closing themes are "Shikasutto Nonsense" (しかすっとナンセンス) performed by Daiji Man Brothers Band for the first 24 episodes and "Kibun wa Papuwa Hare" (気分はパプワ晴れ) performed by Kouji Tsuno and Pythagoras for the remaining episodes.

Directed by Kenichi Nishida, the second series began its broadcast run on TV Tokyo from 30 September 2003 to 30 March 2004.