The series was adapted into an anime film series, divided into seven chapters, which were animated by the studio ufotable. The films are released in achronological order. The first chapter, titled , premiered across Japanese theaters on December 1, 2007, with the second, third, fourth, fifth, sixth, and seventh chapters, , , , , , being released soon after on December 29, 2007, followed by January 26, 2008, May 24, 2008, August 16, 2008, December 20, 2008, and August 8, 2009 respectively. A compilation film of the first six films with some new footage was released on March 14, 2009, in preparation for the release of the final seventh film. In connection with the film's release, the novels were once again reprinted, as three volumes with new illustrations. A North American premiere of the fifth chapter was held on May 22, 2009 at the Anime Boston convention.