Kunihisa Sugishima

A wealthy mogul organizes a world fighting tournament on an offshore Chinese island. His hated son in search for vengeance and a pair of cops investigating the real reason for holding the tournament secretly join the fighters.

Legend says that the enigmatic Millennium Puzzle will grant one wish to whoever deciphers its ancient secrets. Upon solving it, high school student Yuugi Mutou unleashes "another Yuugi," a peculiar presence contained inside. Now, whenever he is faced with a dilemma, this mysterious alter ego makes an appearance and aids him in his troubles. (myanimelist.net)

Ten years after the Bubble War, the dichotomy between the rich and the poor in the world becomes more prominent and Japan is no exception. The rich seek to satisfy their desires and derive pleasure for themselves, and Tokyo has materialized into such a city as a result. Saiga, once a war photographer, works for Hibara Ginza in the capitalist state of Tokyo. He infiltrates the Roppongi Club, a secretive base located in the red light district of the city, to collect information about them. (myanimelist.net)