MTL - Conan: Open the Door, I’m a Policeman - v3 Chapter 31 first aid

Then there’s James Bellini. His nickname? The Angel of Death.The man everyone fears. The man they all whisper about in dark corners. They say he’s merciless, that he has killed more people than anyone in the Circle. No one dares cross him. But there’s a secret, one that no one knows.James Bellini has never killed anyone. Not once.The rumors started because of a misunderstanding, a mistake so deep that even he couldn’t fix it. Now, the entire underworld fears him. Even the other bosses treat him like an equal, like he’s one of them. But the truth? The truth is something only God himself could untangle. And James? He’s just a man caught in the middle of it all.

The world that nurtured the civilization which reached the pinnacle of magic was on the verge of destruction.
The last survivor transmigrated to the past, when the magic civilization started growing, as countless mages were still fumbling their ways through the thorny paths of magic knowledge.
He, who came from the end of the magic era, aim to reach the pinnacle of magic.

- Description from Novelupdates

Three Emperors have died in quick succession. The prince whom nobody had taken notice of unexpectedly succeeds to the throne. He is quickly plunged into layers upon layers of danger. The Empress Dowager dislikes him, wishing to install a younger, more obedient Emperor. His half-brother dislikes him, accusing him of stealing the throne that is rightfully his. The palace attendants and servants dislike him, believing that he is not a true Emperor. The Child Emperor must save himself.