Centuria is a dark fantasy manga about Julian, a Roman soldier who is betrayed and killed, only to be reincarnated 1,600 years later into a dangerous medieval-like world. He retains his memories and combat skills, which he uses to survive harsh realities and protect those he cares about. Readers enjoy the story for its grim atmosphere, tactical battles, the protagonist's unyielding determination, and the poignant contrast between his past life and the brutal new era.