Kuro Masahiko is a high-schooler who's formerly known as the devil prince of death, a demon that could destroy everything in its wake. But, is rather lazy to actually destroy anything. Isabella Miyano, on the other hand, is a blade shaman apprentice, who decides to find the devil prince and kill him. But, Kuro has another secret: He's been reincarnated, and is the only person who knows that he himself, is the devil prince of death. And he soon gets a bit more than he bargained for when at school, he and Isabella befriend various monster students, some of them attracted to Kuro, who drives his libido in order to cause his power?!