Tokyo Broadcasting System Television
An anime television series adaptation was produced by Aniplex, Tokyo Broadcasting System Television, Kodansha, Movic, Mainichi Broadcasting System, and A-1 Pictures. It was directed by Tsutomu Mizushima, with Yōsuke Kuroda handling series composition, Takahiko Yoshida designing the characters and Shirō Hamaguchi composing the music. It ran for 25 episodes and was broadcast in Japan on TBS from April 12 to September 28, 2007. It was followed by a second season, titled , which ran for 13 episodes from April 1 to June 24, 2010.