Hyakko(2008)

Original title: ヒャッコ

Hyakko is a Japanese manga created by Haruaki Katō. It started serialization on Flex Comix's free web comic FlexComix Blood on January 16, 2007. An anime adaptation produced by Nippon Animation was first aired in October 2008 in Japan. An OVA was released on October 17, 2009.