Hyakkaou Private Academy. An institution for the privileged with a very peculiar curriculum. You see, when you're the sons and daughters of the wealthiest of the wealthy, it's not athletic prowess or book smarts that keep you ahead. It's reading your opponent, the art of the deal. What better way to hone those skills than with a rigorous curriculum of gambling? At Hyakkaou Private Academy, the winners live like kings, and the losers are put through the wringer. But when Yumeko Jabami enrolls, she's gonna teach these kids what a high roller really looks like!

A school appears peaceful from a distance, but a fierce gambling battle takes place once again. Yumeko Jabami is involved in the battle.

Kiira seems like an ordinary young girl, who likes to talk with her friends and to dress up. Her ultimate goal is to become the world's best baker, but what differentiates her from others is that she is a vampire. She has never told anyone her secret, including her childhood friend Tetsu, whom she played with everyday and liked as a child. After her parents died when Kiira was only 12 years old, she had to go live with her relatives and lost contact with Tetsu. Now, 8 years later, Tetsu appears at the bakery where Kiira is working part-time. Kiira is ecstatic to see her first love again. Soon, they are dating and Kiira dreams of having a family with Tetsu. Kiira also becomes filled with worries because she is vampire.