Goddess of Winning (Tokyo Revengers x OC)

A young gambler that is too good at winning and too bad at losing, she is called the goddess of games and gamblings, she was wanted by all of the organizations that wanted to use her for planning and winning, she is good at analyzing and how to win things, that's why she is famous in gangs and mafias.

But she got killed after being stabbed, and got reincarnated to a world full of gang, that she wanted to avoid in this new life of hers.

What will happen to her promise that living peacefully and away from things that she was surrounded with in her past life, if her cousin is the main character of the manga called Tokyo Revengers, without her knowing?