When Yuuto Morioka, an ordinary high school student, is selected as a potential devil king successor, he enrolls in Ginsei Academy for devils, facing scorn from his peers. A pivotal moment arises when the captivating devil Lizel Himekami offers to serve as his retainer, changing Yuuto's life dramatically. Blessed with a unique ability to instantly master any magic and absorb endless magical energy through physical contact with his female retainers, Yuuto possesses a power exclusive to humans. As a human-turned-devil king contender, Yuuto challenges the mightiest devils, striving to claim the title of the righteous devil king. Dive into this exhilarating and captivating fantasy as Yuuto embarks on his journey in the world of magic academia!