One fateful day, Yuuto, a typical high school student, stumbles upon a cryptic tarot card near his bedside. His parents' revelation changes everything - as the descendant of demonkin, he's destined to ascend as the next Demon Lord. Thus begins Yuuto's journey to a sinister academy where he hones his demonic talents to claim his rightful title, all the while navigating the complexities of acquiring a harem.