![](https://cdn.animecharacters.io/images/anime/large/861-d2ecff2c.jpg)
Format
TV
Episodes
11
Episode Duration
22 min per ep
Status
Finished Airing
Premiered
Spring 2006
Aired
2006-04-14 to 2006-06-23
Source
Manga
Rating
R - 17+ (violence & profanity)
Genres
Action
Adventure
Mystery
Drama
Sci-Fi
Shoujo
Survival
Studios
Bones
Producers
Dentsu
SKY Perfect Well Think
Fuji TV
Asmik Ace
Sony Music Entertainment
Licensors
Funimation
Juu Ou Sei (獣王星)
After the murder of their parents, 11-year-old twin brothers Thor and Rai Klein are sent away from their home planet. They find themselves awakening on the terraformed planet of Chimaera, where carnivorous plants dominate and the few humans who live there are divided into four groups known as "Rings." Soon after, they meet a young man by the name of Zagi, and the twins learn that only the "Jyu Oh Sei"—the one who conquers these four Rings—is allowed to leave the planet. Driven by the desire to return home and discover the truth behind the death of his parents, Thor resolves to survive in the harsh, merciless environment of Chimaera. However, he quickly learns there is more than meets the eye in this strange ecosystem. As Thor is swept up in the politics that entangle the Rings, he uncovers more about his parents' murder, and ultimately, humanity's fate as a whole. [Written by MAL Rewrite]