The year is 3000 where magic is common place. Transferring to the Constant Academy of Magical Arts just as the new quarter begins, Sai Akuto hopes to become a High Priest.  But during his aptitude test on the first day, the artificial spirit Yata-garasu says that he's destined to become a "Demon Lord"!  So now Hattori Junko, who he'd sworn an oath of friendship with earlier that day, challenges him to a duel. The duel is interrupted by a girl named Keena as the misunderstandings get worse and worse!
Akuto, potential future Demon Lord, begins his days of trying to fix these misunderstandings!
Although it seems that this aptitude test
of sorts has never been incorrect,