I hope you will change your mind. What is the theme song of TV series?

I hope you will change your mind. It's the theme song of the TV series Don't Leave Me. By querying QQ music, I know that I hope you will change your mind. It is a lyric in the song "Be your lover" and "Be your lover" is the theme song of the TV series "Don't leave me". So I hope you can change your mind. It's the theme song of the TV series Don't Leave Me. The theme song is the main music used to express the works in movies, TV series, animations, stage plays and other works.