What is justice? Is it about being kind? Or is it about winning? A certain man claims that "Justice is about robbing." Yamaneko is notoriously elusive, but wherever he shows up, enormous amounts of money gets stolen. Evidence of the audacious crime is left scattered all over the place. In every episode, Yamaneko the hero thiefthrows a splash of “rotten justice” in your face. Pretentiously calling himself a “genius thief,” Yamaneko is arrogant and acts like he's the king of the world. Everything he does is bold and daring, but he remains elusive. There is indeed no match for Yamaneko. He goes by one creed alone—“I will steal but I won’t deprive.” Why does he steal? Just what is he all about?