The Demon Sword Master of Excalibur Academy

"The Demon Sword Master of Excalibur Academy" (Japanese: 聖剣学院の魔剣使い, Seiken Gakuin no Makentsukai) is a Japanese light novel series written by Yu Shimizu and illustrated by Asagi Tosaka. The story follows Leonis, a demon lord who sealed himself away a thousand years ago to prepare for a final battle, only to awaken in the body of a ten-year-old boy. A girl named Riselia from the Holy Sword Academy discovers him sealed and takes him back to the academy. Leonis is astonished by how much the world has changed and, under Riselia's care, begins his studies at the academy. The series has also been adapted into a manga and a television anime. The manga, illustrated by Keigen Asuka, began serialization in "Monthly Shonen Ace" in 2019. The anime, produced by Passione, aired from October to December 2023. The series is popular for its unique setting, characters, and mix of fantasy, action, and school life elements.