The World's Finest Assassin Gets Reincarnated in a Different World as an Aristocrat (TV Series)

TV Series (2021). 12 Episodes. When a great assassin is reborn in another world, he finds himself the heir to a long line of killers from the shadows. With both his modern-day knowledge and experience and the special magic and techniques of this new world, he could very well become the most unstoppable assassin in history…! (Source: ANN)