The Guardian of Princess ～I Was Raised by the Four Commandants of the Demon King's Army but I'm Human and So Loved by the Demon King's Daughter She Bestowed Upon Me the Power of Domination!～

Abandoned in the demon realm shortly after birth due to his complete lack of magical power, Leon’s life seemed destined for an early end. Yet fate intervened when he was discovered by the Four Heavenly Kings—the most formidable and revered commanders within the Demon King’s Army. Rather than casting him aside, these supreme warriors took the human infant under their wing, personally training and nurturing him as their own. Under the relentless tutelage of the world's strongest fighters, Leon transformed from a powerless outcast into a magnificent soldier within the demon ranks. Through years of rigorous discipline, he awakened an extraordinary ability: the power to rule over every form of magic. No longer defined by the weakness that led to his abandonment, he now stands as an elite warrior forged by the very apex of demonic strength. Leon’s unwavering loyalty is soon tested with a critical new assignment. He is tasked with serving as the personal guardian of Alicia, the beloved daughter of the Demon King. As she prepares to enroll in a prestigious magic academy located on the distant and enigmatic Paradise Island, Leon must accompany her, using his unrivaled mastery of magic to ensure her safety in an unfamiliar world.