There is a novel with a character called Nine Nether (I forgot the exact name, only know the surname Nine Nether).

At the beginning of the novel, the female protagonist had transmigrated three years ago and became a princess of a certain country. She was going to marry the Seventh Prince, Nine Nether (I forgot her exact name, only her surname was Nine Nether), but the Seventh Prince did not like her. The Second Prince wanted to harm the Seventh Prince. That was all he remembered. Great Immortals, please help me tell me the name of the novel. Thank you very much!