Allison & Lillia (アリソンとリリア, Arison to Riria?) is a Japanese television anime series adapted from the light novel series Allison and Lillia and Treize by Keiichi Sigsawa. The anime, produced by Madhouse and directed by Masayoshi Nishida, originally started airing in Japan on the NHK television network on April 3, 2008, and is set to run for twenty-six episodes. The first half of the anime will cover the Allison novels, while the second half will cover the Lillia and Treize novels.

Source: Wikipedia