Nisemono Reijou no Fukushuu: Adauchi no Tame, 5-nin no Koushaku Reisoku no Konyakusha ni Narimasu

Overview

Sophia, a talented maid in the service of the Count Lorraine, looks exactly like his daughter, the Countess Ange. She works for the Countess, to whom she is indebted, every day, making use of her ability to pretend to be Ange. However, Ange takes her own life after an incident. Sophia is determined to bring the culprit to justice, and decides to marry into the Marquise d'Auvers family, where she is convinced there is an avenger, by assuming Ange's identity! A gorgeous love suspense begins! (Source: Ura Sunday, translated)

Source: AniList