Great Teacher Onizuka

Great Teacher Onizuka, officially abbreviated as GTO, is a Japanese manga series written and illustrated by Tooru Fujisawa. It was originally serialized in Kodansha's Weekly Shōnen Magazine from January 1997 to February 2002, with its chapters collected in 25 volumes. The story focuses on 22-year-old ex-bōsōzoku member Eikichi Onizuka, who becomes a teacher at a private middle school, Holy Forest Academy, in Tokyo, Japan. It is a continuation of Fujisawa's earlier manga series Shonan Junai Gumi and Bad Company, both of which focus on the life of Onizuka before becoming a teacher.