The Demon Sword Master of Excalibur Academy

The Demon Sword Master of Excalibur Academy is an action-fantasy school harem romcom ONA anime adapted from the light novel series created by Yū Shizuri and illustrated by Yū Shimizu. The series stars Riselia Crystalia and Leonis Magnus, brought to life by studio Passione under the direction of Hiroyuki Morita, with series composition handled by Kunihiko Okada, delivering a dynamic blend of fantasy battles and romantic comedy in a school setting.

The Demon Sword Master of Excalibur Academy is set in a world where humanity struggles against terrifying creatures known as Voids. Leonis Magnus, once the mightiest of all Dark Lords and a master of undead sorcery, sealed himself away in magical stasis during a decisive battle a thousand years ago. Upon awakening in this unfamiliar new era, he is greeted by a silver-haired young woman named Riselia Crystalia—only to discover something utterly bewildering: the fearsome Dark Lord has been reborn in the body of a ten-year-old boy. With an entirely different world surrounding him, Leonis must navigate life under the care of his new guardian Riselia, conceal the overwhelming power that lies dormant within him, and confront the ongoing threat posed by the monstrous Voids. The unlikely adventure of history's greatest Dark Lord trapped in a child's form is about to begin.