Strike Witches (Japanese: ストライクウィッチーズ, Hepburn: Sutoraiku Witchīzu) is a mixed-media project originally created by Humikane Shimada via a series of magazine illustration columns. It was later adapted into two light novel series, three manga series, an anime OVA, a televised anime series and various video games. The story revolves around teenage girls who use machines equipped to their legs to do aerial combat. The OVA preview episode was released on January 1, 2007.