Yamaneko (Kazuya Kamenashi) is a mysterious thief. He steals money from people and corporations doing evil. In the process, he also exposes their evil deeds.

A man called Yamaneko steals large sums of money from companies that don't exactly play by the rules, all the while uncovering the dastardly deeds of those corporations. Is he the greatest thief of the century, or is he actually a champion of justice?—Amazon Prime Video

"Who gives a hell about justice?!" A hero of darkness who wanders through the dark night... Is he the greatest thief of the century, or is he actually a champion of justice? What is justice? Is it about being kind? Or is it about winning? A certain man claims that "Justice is about robbing." YAMANEKO(Kazuya Kamenashi from "KAT-TUN") 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 thief throws 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? These are the great mysteries of this incredibly entertaining yet highly unpredictable story!.—Nippon TV