Nanjue Weite Zhi Si

Monika, the eldest daughter in Viscount Wodehouse’s family, inherited her Indian mother’s exotic beauty and combined with her good manners, made her greatly admired amongst the local aristocrats. But unbeknownst to all, the proper lady Monika has a secret identity as a writer of erotica! During a charity ball after the end of the Great War, a certain someone appeared to turn her life upside-down, and Monika was dragged into the murder case of an aristocrat. In order to protect all that she cherished, Monika will have to track down the clues and unravel the conspiracy to find the truth behind the death of a baron!

(Source: Bilibili, translated)