This work was originally serialized in Japan in "Chara " magazine, starting from 2001, and was published by Tokuma Shoten. Since 2011, it is published by "Zero Sum Ward" of Ichijinsha. The series is licensed in North America by Tokyopop, the first volume of which was published in January 2007. There are 6 volumes which were originally published between 2001 and 2008. The series is also published in English by Chuang Yi, in German by Carlsen Comics and is published in East Asia.