Assassin's POV in Another World

The 'Triad of the Night' is a worldwide organization recognized in all Asian, American and other continent countries, who are afraid that one day they will start their movements. Park Chan-woo, its leader and patriarch, holds the title of 'Monarch', which is only given by the previous Monarch. Park Chan-woo swore an oath. 'I promise that I will kill all the members of the Tríada of the night, including the Seven Seats of the organization; with that, my organization will definitely die'. The Seven Seats, who were the seven strongest members of the organization, and Monarch Park Chan-woo went to war and both sides were decimated. Park Chan-woo was the greatest assassin, but he actually wanted such a life; not really, that's why he decided to step aside from the greatest organization in the world. However, he never imagined that he would be reincarnated in a world with magic, where someone with his talent would live as he had always wished. The only problem is that the strong lead that world and so do the nobles.