Butt Detective the Movie: Shiriarty

A baffling series of crimes turns out to be the work of Shiriarty, a villain who seeks to steal a mysterious treasure known as the O-PARTS. Oshiri Tantei along with his assistant, Brown, enlist the aid of Audrey, an investigator from the international police organization Wanterpol, in an effort to prevent the O-PARTS from falling into the wrong hands while Shiriarty strives to plunge the world into darkness.