Mint is a girl who happens to be the princess of the world of dreams and magic. The natural environment of her world is a reflection of the dreams of the people on Earth. It is now in danger as people lose faith in their dreams and let darkness enter their hearts. The environment of Mint's world is starting to wither and die. On her 12th birthday, after a gala celebration with her father the King and her mother, she agrees to go to the world of humans to try to preserve people's hopes and dreams, and to prove that she has the qualities necessary to be a wise ruler. Her father arranges for her to stay with his sister, Mint's aunt Herb, who runs a gift shop on Earth called "Happiness Shop".

Ten thousand years ago, the immortal king Muyun was conspired by others for holding the Zhu Xiantu. After ten thousand years of sleep, his remnant soul awakened on the famous "Trash Muyun" of the Southern Cloud Empire of the Heavenly Fate continent.

Five girls came to a training school to become voice actresses holding each thought in her mind. Momoko - she wanted to be a voice actress to meet her favorite voice actor. Rinka - she is an armature voice actress, but she didn't have special purpose to become voice actress. Yurika - she likes anime very much. Tsubasa - she was a girl in love, and acted only as a boy. Amane - she found a deadlock as a actress and tried to find another way. They managed to get over the difficulty to become voice actress although they couldn't perform as main characters yet. There is a love romance with a boy works for an anime company, and you can catch a glimpse of situations of anime industries.

Jungle Emperor was such a hit in Japan, that Dr. Tezuka went ahead and produced a sequel in 1966, known in Japan as "The New Jungle Emperor" or "Onward, Leo!" The trouble (for us in the rest of the world) was that he made the series without having a deal with NBC, and he made it more like his original manga story, which means that there were a lot of characters that died and some of the episodes could be depressing. NBC thought that there was no way they could sell that kind of show, and they were quite happy with the 52 episodes they had, so the New Jungle Emperor series wasn`t seen in this country until 1984, when it was given the title Leo The Lion. This series was supposed to take place a few years after the original Kimba series. Kimba was an adult, with Kitty as his mate, and they had two cubs. Most of all this series was the story of Rune, the male cub, as he grew and learned to be as strong as his father. For legal reasons, the producers of the English-dubbed version could not use the name Kimba, so they used the original Japanese names for all the characters.