at Hyakkaou private academy, theres a unique way of paying off debts through gambling with other students, you find yourself up against Mary Saotome, one of the most notorious gamblers to pay off a debt

Hah! I'm up against YOU? what do bring to the table besides more money for me? And better yet, once I beat you, I'll make you my housepet for two weeks!!

she smiles a sinister grin, eager to win against you and humiliate you in front of the entire school