Wolf Guy(ウルフガイ) is a Japanese manga series of two volumes published in 1970 by Bunkasha. Originally written by Kazumasa Hirai and illustrated by Hisashi Sakaguchi (坂口尚), the series has been readapted with a more violent and mature setting in 2007 by Yoshiaki Tabata and Yuuki Yugo. This new adaptation, also known as Wolf Guy - Ookami no Monshou, has been released as eight volumes by Akita Shoten.