Please recommend a novel with a prosecutor male protagonist and a female protagonist who was originally a bad girl but later became a star.

The couple lived upstairs and downstairs. The female lead had a crush on the male lead because she could hear him humming in the bathroom every morning. Later, she tried to pursue him but failed. She was the school's tyrant flower and was always fighting. The male lead even met her and got injured many times... Later, for some reason, she left and asked the male protagonist to wait for her. A few years later, the female lead became a popular star. After she returned, she pursued the male lead and moved back to her original place. Then, she gave him rice cakes and whatnot. It was quite successful and they got together later. The female lead was called Jiang Zhong 'er.