Please recommend a modern romance novel. The male protagonist is a gangster and the female protagonist is a killer.

I recommend Love Addiction: The Cold Young Master Spoils Me Alone to you. This novel was about the story between a ruthless number one killer on the Gold List and a noble and cold young master of the underworld. Both of them were cold and heartless people, but they met and attracted each other, and they started a strong confrontation. At the same time, this novel also described the sweet love between the two of them, which was fascinating. I hope you like this fairy's recommendation. Muah ~😗