Tokko.

Tokko is a Japanese manga series written and illustrated by Tohru Fujisawa. It was serialized in Kodansha's Afternoon in 2003 and collected into 3 tankōbon volumes. An anime adaptation directed by Masashi Abe, animated by AIC Spirits and Group Tac, first aired in Japan on April 15, 2006 and ran for 13 episodes. The manga was licensed in North America by Tokyopop, who released the first volume on July 15, 2008. The anime was licensed in the United States and United Kingdom by Manga Entertainment, with its first DVD released on March 20, 2007, and in Australasia by Madman Entertainment. In the US the SciFi Channel aired Tokko in 2007, in 2010 it aired on Chiller, while in Canada it was shown on Super Channel.