Kakegurui

Children from influential families in politics and businesses attend the Hyakkaou Private Academy. There, the hierarchy of the students is classified by a series of games. Students that win the games are on the ruling side, and the students who lose become slaves. One day, a mysterious girl, Jabami Yumeko, is transferred to Hyakkaou Private Academy. She looks pure and pretty, but she is actually a compulsive gambler and seeks out the thrill of taking calculated risks.
~~ Adapted from the manga "Kakegurui" (賭ケグルイ) written by Kawamoto Homura (河本ほむら) and illustrated by Naomura Tooru (尚村透).