In a world of ancient legends and hidden powers, there is a man who has been the strongest for a thousand years. With black hair and an unremarkable appearance, he appears to be a 25-year-old, but his wisdom surpasses his age. Taking up the role of a librarian at the prestigious Sanctum Academia, a university for powerful beings from various races, he remains unknown. He silently observes and influences seekers of knowledge and strength, all while preserving the world's most profound secrets. This is the tale of the enigmatic figure who embraces the shadow of time, forever devoted to the pursuit of wisdom.