Gamble or become a housepet! Since enrolling in Hyakkaou Academy, school life is nothing like Mary Saotome envisioned it to be. In order to save her friend Tsuzura from the housepet ranks, Mary must risk everything—even her own pride. However, after her gambling prowess catches the eye of popular student council executive Aoi Mibuomi, he offers to pay off Tsuzura's debt in exchange for...Mary herself!