At the acclaimed Hyakkaou Private Academy, Mary Saotome, a freshman, is confident in her prospects for success. Nonetheless, her life takes a turn when she comes across a former peer who is now a subordinate. Instantly, Mary is introduced to the risky realm of gambling. Will she be able to trust her intellect and chance to form alliances and escape financial ruin? Unveil the resolution in this precursor to the extremely beloved Kakegurui.