What does BG and TL in novels mean?

BG and TL were the two gender labels that appeared in the novel. BG usually refers to the normal gender ( Boyfriend/Girlfriend) or love relationship refers to the love story between two men or women. This term is mainly used to describe the love relationship between men and sometimes also between women. TL usually referred to the normal gender ( Boyfriend/Girlfriend) or a love relationship referred to a love story between two men. This term is mainly used to describe the love relationship between men and sometimes also between women. It should be noted that BG and TL are only gender labels in novels, but it doesn't mean that these stories describe real love relationships. Fictions were a fictional art form that allowed one to use one's imagination to create plots of different genders, backgrounds, and stories.