Keiko Kitagawa
"Romance of Darkness" was adapted into a live-action feature film directed by Kenji Gotō and released in theaters in Japan on May 27, 2006. It starred Aki Maeda of "Battle Royale" fame as Rikka Nikaido, and Keiko Kitagawa of "Pretty Guardian Sailor Moon" and "" fame as Rikka Mizuchi. The film contains an original ending as the manga was still being serialized at the time. It was released on Region 2 DVD by Pony Canyon in Japan on September 20, 2006.