Kekkaishi: Kokubōrō no Kage

Kekkaishi (結界師; lit. 'Barrier Master') is a Japanese manga series written and illustrated by Yellow Tanabe. It was serialized in Shogakukan's shōnen manga magazine Weekly Shōnen Sunday from October 2003 to April 2011, with its chapters collected in 35 tankōbon volumes. The series is about Yoshimori Sumimura and Tokine Yukimura, heirs to rival families of kekkai (barrier magic) users, who must defend their school from the spirits drawn to the sacred land upon which it is built. A 52-episode anime television series adaptation produced by Sunrise was broadcast from October 2006 to February 2008. Both manga and anime series have been licensed for English release in North America by Viz Media.