'The Strongest Hypocrite in History' meets your requirements. The male lead appeared to be upright and noble on the surface, but he was actually despicable and shameless. In the beginning, he fought with the female lead. The female lead saw through the male lead's schemes many times but was also saved by the male lead. In the end, the female protagonist still got together with the male protagonist, but the male protagonist didn't really change for the better. He was still a bad person, but the female protagonist still loved him. I hope you like this fairy's recommendation. Muah ~😗