The story is set in the prestigious private school Hyakkaou Gakuen where its students' hierarchy are decided by how well they gamble. The victors will be able to get control over others while the losers will be subjected to harsh treatment and lose their money. Jabara Yumeko (Hamabe) is a new transfer student at Hyakkaou who looks pure and innocent on the surface but is actually someone who relishes in the thrill of taking on risks through gambling. As a result of her sharp observation powers and memory, she disrupts the hierarchy within the school as she overcomes the challengers sent by the student council to defeat her and drives them to destruction.
Hamabe commented that this is the first time she is taking on such an individualistic character so she is feeling unsure about it. Nevertheless, she finds it really enjoyable to take on this challenge and pledged to try her best to play Yumeko well.
Sources: Nikkansports / Sponichi / Oricon / Eiga.com