The Demon Sword Master of Excalibur Academy

After a millennium of slumber, the fearsome Demon King Leonis awakens to an unexpected reality—trapped within the fragile form of a ten-year-old child. His ancient plans for a climactic war are abruptly interrupted when Lisellia, a radiant warrior from the Holy Sword Academy, discovers him. With gentle concern, she reassures him, “What were you doing in such a dreadful place? Don’t worry, I’ll protect you now!” Under her watchful guidance, Leonis struggles to comprehend how drastically the world has transformed during his absence. Lost in this unfamiliar era, he reluctantly follows Lisellia’s lead, eventually becoming a student at the very academy sworn to oppose his kind. The irony isn’t lost on him as he navigates this strange new life, surrounded by those who would have once been his enemies.

The once-mighty ruler now faces the humbling challenge of adapting to a world where his past holds no meaning. Lisellia’s kindness contrasts sharply with the hostility he expected, leaving him torn between suspicion and gratitude. As he adjusts to his youthful appearance and diminished powers, Leonis must conceal his true identity while uncovering the mysteries of this changed world. The Holy Sword Academy, a place of light and order, becomes his unlikely sanctuary, though danger lurks beneath its noble facade. With every passing day, Leonis finds himself drawn deeper into conflicts he never anticipated, forging uneasy alliances and confronting remnants of his forgotten reign.

Though his body is that of a child, his mind remains sharp, calculating each move with the precision of a seasoned strategist. The academy’s halls buzz with whispers of his strange presence, yet none suspect the truth. Lisellia, oblivious to his dark origins, treats him with unwavering warmth, further complicating his mission. As Leonis delves into forgotten histories and hidden truths, he begins to question whether his return was mere coincidence—or part of a greater design. The lines between ally and foe blur, forcing him to reconsider his place in this new world.

Haunted by echoes of his past, Leonis walks a delicate tightrope between his demonic legacy and the fragile bonds he now forms. The Holy Sword Academy, once a symbol of everything he opposed, becomes the stage for his most unexpected battle—not against armies, but against his own nature. Will he embrace this second chance, or will the shadows of his former self consume him once more? Only time will reveal whether the Demon King can rewrite his destiny in a world that has moved on without him.