Synopsis

The Demonic Cult Leader, Seok Woncho, was a monster who even surpassed the Blood Cult Leader.Do you know who killed him?"Ha Mu-baek.""But why are you bringing that up?""Because he's coming to our Mengryong Academy as an instructor."Da** it. We're screwed!Ha Mu-baek, the greatest martial artist who crushed both the Demonic Cult and the Blood Cult,is now assigned as an instructor at a martial arts training academy due to a political power struggle.Determined to live quietly while keeping his identity hidden,he soon finds himself solving the problems of cadets with heart-wrenching backstories,disciplining the trashy human scum at the academy, and inexplicably becoming busier by the dayWelcome! It's your first time meeting a genius lunatic instructor, isn't it?!