خلاصه داستان : داستان سریال مربوط به یک سال قبل از انتقال یومکو به آکادمی خصوصی هیاکائو می باشد. جایی که ساتومه ماری با تلاش خود به این آکادمی راه یافته…

It's a year before Yumeko transferred to Hyakkaou Academy. Saotome Meari, a young girl who was born into a very ordinary family, passed her transfer examinations, and has started to attend Hyakkaou. However, the school she expected to attend has a crazy law, the Baptism of Gambling. Paired with Yumeko as her "twin," the curtain opens on Meari's gambling mania!

خلاصه داستان : 11 دختر مدرسه‌ای ژاپنی که به کف اتاق غذاخوری بیدار می‌شوند و باید بفهمند چرا آنجا هستند و چگونه می‌توانند فرار کنند.

Eleven high school classmates awaken, restrained to a large dining room. While fearing for their lives, they question a motive to this bizarre act.