Where is this place? I am afraid I cannot answer that. Instead, I will have the two of you begin your game. This game places your lives on the line. Until it is over, you may not leave.
~ translated and adapted from official site by Cranston
Decim
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After death, humans go to either heaven or hell. But for some, at the instant of their death, they arrive at the Quindecim, a bar attended by the mysterious white-haired Decim. He challenges them to the Death Game, wherein they wager their lives and reveal their true natures.
— adapted from ANN