a 13-episode anime adaptation produced by gonzo and directed by takayuki inagaki aired in japan from january 3, 2008, to march 27, 2008, on tokyo mx, chiba tv, and tv kanagawa, with later runs on tv saitama, tv osaka, tv aichi, aomori broadcasting corporation, and kids station. six dvd compilation volumes were released between april 25 and september 26, 2008, and a dvd/blu-ray box set was released on january 29, 2010. the anime quickly became notorious for its excessive use of fanservice in the form of panty shots, leading the series to be censored on certain channels during its tv broadcast.