SSS Rank: Escaped Experiment

Leo Tong is subject 001, an SSS-rank modified human, and he ran from the organization that made him. He buries his name, settles in a walled slum called Zhu Long, and marries Lily, the woman who once saved his life. The quiet lasts until the organization traces him to the slum and moves in. Protecting Lily means fighting where people can see him, which tells them exactly who he is. Leo goes after the branch head, allies with a woman investigator named Grace, and gets into the organization's headquarters. The leader is David Tong, his own father. Years earlier David needed a subject for his experiments and used his son, weaponizing the boy into a killing tool with nothing of himself left. Leo loses their first fight, and David triggers a self-destruct and escapes. He comes back holding Lily. Grace is there for the last of it. Leo has to decide what he is going to do about the man who made him, with his wife in the man's hands.