Tezuka Osamu's " The Prince of Tennis " was a very popular Japanese manga and anime. The main character, Kunihiko Tezuka, was a talented tennis player from Japan, while the female lead, Chitenta Airu, was a half-demon with the dual identity of a human and a monster. This novel was often called " The Prince of Tennis Doujin Fictions " or " The Legend of the Half-Demon Prince of Tennis ".