An catastrophic tragedy known as the Invertia reshaped the planet in the preceding century. Existing nations' authority dwindled drastically, creating the stage for the Integrated Empire Foundation to seize control. But, more crucially, the Invertia resulted in the development of a new kind of human, the Genestella, who are born with extraordinary physical talents. Its finest are hand-picked from all over the world to attend the top six schools, and they compete in entertainment battles known as Festas. Ayato Amagiri is a scholarship transfer student at the famous Seidoukan Academy, which has recently been plagued by poor performance. He unintentionally encounters the popular Witch of Resplendent Flames, Julis-Alexia von Riessfeld, half-dressed as a result of a chain of circumstances! Julis, enraged, challenges him to a duel.