It's a bl. And it has gambling. Basically the main character is with these men who (I think) kidnapped him or coerced him into playing cards by helping them cheat and win. However, when they were playing this time, the Male lead (who's a master at playing cards and cheating) won (obviously) and beat the shit out of the men but spared Main character. The main character and the male lead ended up living together. The male lead's crew was in charge of teaching the main character on how to play cards. It's similar to The Foul

Does "I became a god of a horror game" have an alternative name here?
Its not here.