I Became the Greatest Heiress of the Empire

Estelle was a woman who suffered from a stigmatized disease. One day, upon seeing the main protagonist Ceria, Estelle realizes that she has become the extra in a novel. Kicked out of her home as a child for being switched with a maid's child, Estelle is saved by the Valois brothers and begins to fall in love with Claude, the male protagonist who is supposed to be connected to the protagonist, Ceria... (Source: Naver Corporation, translated)