Mei you ni mei you wo (2000)

Music producer Alex Lam is a has-been whose girlfriend Shirley makes the right career move by dumping him to concentrate on her own professional life. He heads to the nearest bar and ends up having a one night stand with waitress Ivy Wong after too much to drink. When he tries to meet her again, she mistakes him for a rapist and fights him off. He discovers that Ivy has a daytime job as a kindergarten teacher and dreams up a career for her as a singer. He takes her to the studio for sound tests which show promise after a lot of training and they move in together. But as her career takes off, Ivy and Alex go separate ways...