Demon’s Sword Master of Excalibur School

In the fantasy tale, the demon king Leonis chose to seal himself away for a millennium to prepare for the ultimate battle. However, upon awakening, he discovered that he had been reborn as a 10-year-old boy. A lovely young lady named Lisellia, who was a member of the Holy Sword Academy, approached him and asked why he had been imprisoned. She then offered to take care of him as an older sister would. Leonis was taken aback by the drastic changes in the world under Lisellia’s guidance. He was bewildered and disoriented, but he eventually enrolled in the Holy Sword Academy.