Please recommend a completed novel where the male and female protagonists have conflicting identities.

Please attach a brief introduction to the completed novel where the male and female protagonists have opposite identities but fall in love with each other. Like cops and killers| The underworld, or novels where the two sides were on opposing sides in business. I remember reading a plot like this somewhere. The male lead is the boss of the underworld and the female lead is a policeman. After the male lead and the female lead have sex, the female lead gets up and turns on the computer while sleeping. She keeps trying to turn on the password. In the end, the password is the female lead's birthday. After the female lead turns on the computer, she uses the USB to test for evidence. After the test, she turns around and suddenly sees the male lead sitting on the bed looking at her. The male lead walks over and takes the female lead's USB away, saying, Why are you still barefoot on such a cold day? My heart will ache. He gently put it on for the female lead. He had forgotten about the rest of the plot. Everyone, help me look for it. Similar novels were also possible. If there wasn't a good-looking killer, Love could also ask. It would be best if there was an article with a story like the one above. Thank you everyone ~~!