In Kyouto, where humans and youkai coexist and spirits run rampant, a succubus named Saki attends a school transformed into a magical land. Using her beauty and abilities, she has become the school's princess!! However, there is a formidable rival who challenges her reign: Ashiya Yuu! This tough-looking man seems immune to her charms and, to make matters worse, is adored by other demi-humans! Saki, who claims to be a queen, can’t stand this situation. Determined to make Ashiya fall for her before anyone else, she devises all sorts of seductive tactics...!!