The "Wolf Guy Series" novels were initially based on two-volume manga prototypes, specifically the first two volumes titled "Ookami no Monshou" and "Ookami no Enka". These manga served as a blueprint for the subsequent novel series. In 2007, Yoshiaki Tabata and Yuuki Yugo reimagined the series with a more violent and mature tone, resulting in the adaptation known as Wolf Guy - Ookami no Monshou.