Ultimate Assassin in Isekai - Ultimate Assassin in Isekai, #7

In the modern era, an assassin named An Fei unexpectedly dies. His soul is summoned to another world by an evil sorcerer, taking residence in a young boy's body. This young boy, originally an experiment of the sorcerer, gains a chance to escape his grim fate due to An Fei's soul inhabiting him. After successfully assassinating the sorcerer who summoned him, he cleverly steps on the corpse of his foe, climbing onto a branch of fortune.  ---  Where there's sunlight, shadows will follow.
As the political and economic hub of the Mao Empire, the Holy City stands as one of the continent's most prosperous metropolises. However, in its less visible corners, unsavory events frequently unfold.