GTO - Shonan 14 Days End

The following content is intended for mature audiences and may contain sexual themes, gore, violence and/or strong language. Discretion is advised. This is a spin-off story of the manga GTO(Great Teacher Onizuka). This takes place directly after the Teshigara arcAfter Eikichi Onizuka was shot by former teacher Teshigara, he was sent to the hospital. Shortly afterward he escaped, and then spent 14 days that no one knew about. Strangely enough, when he returned, a wanted poster appeared with a man that resembled very much like Onizuka. What exactly did he do during these 14 days?