Ruan Susu, an older female otaku, transmigrated to become a young lady of the Duke Mansion in a fictional dynasty.Although she is an illegitimate child whose mother has died, her life is considered prosperous and luxurious!However, within half a month, Sister Ruan realizes she has transmigrated into a book about an illegitimate daughter striving for success!And she merely appears once at the beginning of the book, without even a name, only referred to as Thirteenth Lady, a Bystander!What's more tragic is that the Duke Mansion is about to face confiscation and exile, and Ruan Susu is about to swiftly change from a rich beauty to an Official Slave, feeling the universe's harsh malice coming at her, isn't she?