This is an AU where the characters from Kakegurui will meet an unexpecting mystery person, who gambles with Mary. Mary is in debt with over 600,000 yen, which is about $60,000. The person she is gambling against is paying 4,000,000 yen, which is about $400,000. Thats enough to get her out of debt, at least she thought so, but will she win, or will her debt increase 4,000,000 yen?