A thousand-year-old Dark Lord wakes up as a kid and has to pretend to be harmless while the most powerful magic in his body screams to get out. The comedy comes from watching him fail at being a normal student, fail harder at hiding what he is, and fail completely at not falling for the woman who's supposed to be watching him. It's a show that knows exactly what it is: the setup for a romance that shouldn't work but does because neither of them can stop being themselves.
Leonis Death Magnus wakes from a thousand-year slumber to find himself trapped in the body of a child, with no memory of how he got here. Standing over him is Riselia, a silver-haired woman who becomes his guardian in this bewildering new world. The Dark Lord of legend must now navigate a prestigious academy built to defend humanity against creatures called Voids, interdimensional horrors that threaten existence itself. The catch: nobody can know what Leonis really is. Beneath the innocent facade of a young student lies the accumulated power and knowledge of an ancient sorcerer, and revealing that truth would spell catastrophe. As he attends classes alongside ordinary mages and swordsmen, Leonis grapples with genuine confusion about this transformed age while secretly carrying its fate in his hands. Riselia's protective affection complicates everything, forcing the immortal villain into unexpected emotional territory. This is dark fantasy wrapped in school life trappings, where an ancient evil must pretend to be good while learning what goodness might actually mean.