Touhai Densetsu Akagi: Yami ni Maiorita Tensai S01

Although "Vaghegong" is a game of family and friendship, it's also played in the dark side of society. Na-ngu is a gambler who has borrowed 3 million won. His last chance to clear his record is to collaborate with the mafia and put his life on the line. Unfortunately, as the game progresses, Na-ngu falls deeper into debt and gets closer to death.