Ghost Assassin

Li Chenling, a high-ranking assassin, was killed during a heist of retrieving a bioweapon from the hands of a terrorist. Later he finds himself reincarnated in the form of a child covered in bruises on the street. A cute ghost-like creature appeared in front of him informing him of his mission. To escape eternal damnation, he must relive the life of every innocent victim he has killed as retribution for his sins.