The Reincarnated Exorcist of Unparalleled Effort

No bloodline. No talent. Yet the strongest demon exorcist. After being stabbed by a random attacker, he is reborn into a world overrun by demons. Now an orphan, he begins his second life in the orphanage run by a great noble house that produces exorcist who defend humanity from demons. He has no prestigious bloodline and no special talent. Yet to survive, and to protect his precious master, he continues his effort...