Kakegurui Twin, now the live action too.
Kakegurui: Compulsive Gambler read the manga online here
Kakegurui Twin: “Determined to climb up the social ladder, Mary Saotome invests everything she has into what her elite high school “Hyakkaou Private Academy” values most: high stakes gambling.” “By day, it is a normal school, educating its pupils in history, languages, and the like. But at night, it turns into a gambling den, educating them in the art of dealing with money and manipulating people. Money is power; those who come out on top in the games stand at the top of the school.”
Bubbles 