In the ruined city of neon and steel, I picked up a beautiful android with amnesia. She called me "Master" and saw only dependence and innocence in her eyes. It wasn't until that night that the company's weapons that were chasing us were torn apart with her bare hands. In the rain of blood, she turned back and smiled sweetly at me: "Don't be afraid, I will protect you." I didn't know that what I picked up was not a companion, but the ultimate killing weapon codenamed "Nightingale" wanted by the entire federation. And my identity seems to be far more than just a down-and-out trash guy.