Have you recommended any urban killer novels?

First of all, the first novel I'm looking for is an urban killer novel. The first requirement was that the protagonist had to be strong, and it would be best if he hid in the school. Second requirement: Family background. It would be best if he had no family or was a senior leader of the central government. For example, his grandfather was a senior leader of the central government, or he had a hidden background. The third requirement was the protagonist's character. For example, in front of the world, he was a playboy, but behind him was a powerful underworld boss, or a hidden boss of the underworld. Or, on the surface, he was a poor student, but behind his back, he was a person who looked for killing and looting or looking for women (the kind that the protagonist was more romantic) for pleasure. The fourth requirement was that the protagonist should be rational, cool-headed, passionate, or cold, and talented. The fifth requirement was that the plot should be rich, with at least a few women or girlfriends. Furthermore, the female lead could be a strong woman or a woman who was married. However, it would be best if she was a childhood sweetheart. Otherwise, the two of them would be very loving and trust each other. [Sixth requirement: A clear goal and a clear expression.] "Little White" was also fine. The last basic requirement was that he had to finish the game! (I don't even want the unfinished novel)" (Interlude: It seems that there are too many requests. I hope that all professional readers will post according to the requirements. I won't care about copying or flooding.) O(Empyrean_Empyrean)O~ Superpowers, possession, and rebirth are also okay. To be honest, the bad guy was not bad. However, it was still a little lacking, so I didn't watch it. Moreover, I hoped that the main character would be more 'flirtatious' in appearance. But his heart was still "romantic"! What nonsense. The main thing is that the protagonist's character is the best to be cold to his enemies. The "cruel" is to treat his women, friends, family, and brothers very well. Do you understand this? Furthermore, the negative situations were all very hidden! I'm begging everyone here!