Raised by an older brother who was a genius gambler and learned countless tricks of the trade, the man known as "Bull" knows every kind of cheat. However, he himself has never used any of them—he lives a regular life as a full-time office worker. Then one day, his brother goes missing. As Bull searches for him, he uncovers a clue: his brother has fallen into "the Swamp," a deadly gambling den where those consumed by greed end up. To save the kind brother he once knew—and to uncover his brother’s hidden side—Bull steps into "the Swamp"!

Gen Suzuki has never had the best luck; raised in an orphanage, the only light in his life is his childhood friend, Mayu. When she gets saddled with a life-destroying amount of debt, Gen decides to bet both of their futures on a daring plan to rob an illegal underground casino. Can Gen turn his fortunes around, or will he lose more than his money in this world of high-stakes gambling and dangerous criminals? (Source: Kodama Tales)

Anthology of D.Gray-man doujinshi written by different artists. Pairings: Allen x Kanda, Kanda x Allen