An urban novel with a killer as the main character

It's best if the male protagonist is black-bellied and powerful, and the female protagonist (s) should not exceed 4 "too many can't hold"

Answer 1

There were many types of urban novels where the main characters were assassins, such as Battle Through the Heavens, Martial Arts, and The Selection of the Heavens. These novels usually depicted the protagonist's growth and adventures in the city, but also rich interpersonal relationships and business struggles. In these novels, the protagonists usually used their skills and intelligence to survive and struggle in the complex urban society. At the same time, these novels often involved love, friendship, family, and other emotional elements to make the protagonist more determined and warm on the road of life.