I recommend "Yan Inspection" to you. The male lead and the female lead in this novel are good friends at the beginning, but the female lead has a crush on the male lead. The male lead never shows his love for the female lead, and instead keeps hurting her. In the end, the female protagonist couldn't stand it anymore and left. Only then did the male protagonist realize that he had fallen in love with the female protagonist and made a series of efforts to win back the female protagonist. I hope you like my recommendation. Muah ~