Because of non-stop environmental destruction, the United Nations commission a private company, "Eternal Earth", to create an artificial jungle to be a nature preserve and to protect animals. Leo, son of Panja, is born in this artificial world. The story starts when Leo and Kenichi, the son of the Eternal Earth company's CEO, meet. Kenichi has the ability to understand and talk to the animals.

• Tezuka Productions
• Taeko Kawata
• Akiko Yajima
• Saburo Tokito
• Nanako Matsushima
• Tomoaki Ogura
• Eiichiro Funakoshi
• Rie Kugimiya
• Akio Otsuka