Kannagi: (かんなぎ, Kannagi:? lit. Shrine maiden) Crazy Shrine Maidens, is a Japanese manga series written and illustrated by manga author Eri Takenashi. The manga began serialization in the Japanese shōnen manga magazine Comic Rex on December 9, 2005, published by Ichijinsha. An anime adaptation produced by A-1 Pictures first aired in October 2008 in Japan.

Source: Wikipedia