Series Director Tetsurō Araki, who previously directed Death Note and Black Lagoon, mentioned in a 2010 Dragon Age interview, that he wanted to fill in the anime with many jiggling breast scenes, and that he was aiming for something he would have bought himself in middle school. Masayoshi Tanaka, who also did Ano Hana, Toradora and later Waiting in the Summer, served as the Chief Animation Director and Character Designer for the anime adaptation. Character design was done by manga artist Shōji Satō whose previous work was mostly self-published titles in the adult genre, and this was his first major non-hentai title. Daisuke Sato, who has previously worked on various military genre games and manga, which include Imperial Guards, wrote the story which uses the perspective of Japanese high school students and refers to classic zombie apocalypse movies such as Dawn of the Dead.