School with strange gambling obsession. All girls gamble to climb ranks or fall down to the bottom.
There are somewhat interesting games and tactics to win but most games end by cheating. "You cheated!" "But when rules were explained nobody said that cheating is not allowed." "Ah, OK then."
"Netflix series", which should raise your suspicions and lower expectations.
https://myanimelist.net/anime/50339/Kakegurui_Twin
