 These eight novels are not erotic.A manga adaptation is illustrated by Kanao Araki and was serialized in ASCII Media Works' magazine "Dengeki Daioh" between the November 2006 and August 2008 issues in Japan.Two "tankōbon" volumes were released under ASCII Media Works' "Dengeki Comics" imprint, the first on August 27, 2007 and the second on September 27, 2008.