Legend of the Dragon Kings

is a set of Japanese novels based written by Yoshiki Tanaka in collaboration with illustrator Yoshitaka Amano (Kodansha Novels edition) and mangaka group CLAMP (Kodansha bunkobon).

Two manga adaptations were published by Kodansha and a 12-episode OVA series produced by Kitty Film Mitaka Studio was released from December 21, 1991 to February 19, 1993.

Plot
In ancient Chinese mythology, Four divine Dragon Kings brethren were rulers of the four parts of the world. Now reborn as humans in the modern world with maintaining their supernatural powers to become dragons at will, they are content to live ordinary lives as long as nobody meddles with them.

It becomes the mission of the four brothers to defeat the "Four Sisters", organization headed by four tycoons from America connected with the "Bulls" - enemies of the Dragons who have received ownership of the Western half of the world while the Dragons keep rule over the Eastern half of the world - before they use their control over technology and the economy to take over the world. However, as this battle begins, the four brothers must also find their place in the world as they flee from the destructive will of the "Bulls".