Since humans and yokai chose to coexist, Kyoto has become overrun with demi-humans, spirits, and demons! Saki, a succubus and student in this magic-infested city, has become the beloved queen of her school thanks to her magic and beauty. But her arrogant behavior makes her plenty of enemies as well, including Yuu Ashiya, a persistent boy who's the only remaining holdout against her seduction. Saki finds herself competing for his affections—with other demi-humans, of all things!? As the self-proclaimed queen, Saki has no choice but to beat them to the punch, no matter what lengths she has to go to to seduce Ashiya!...