Mahjong Hishouden: Naki no RyuuEpisode 2

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The protagonist, Ryuu or Crying Dragon, is a mysterious man who often plays games with the gang members. He only wins by "ron," a move in which one needs to wait for the opponent's tile to complete the win.*"Ron" is also called "naki" in mahjong, which has the same pronunciation as "crying" in Japanese.