Doumo, Akuyaku ni Sareta Reijou desu keredo

Livia, an otherwise ordinary lady of prestige, save for her unusual blessing, is suddenly made out to be a villain when her engagement is broken off. And though the bad publicity makes it difficult to find a new fiancee, a marquess of higher status named Therion proposes, despite he and Livia's difference in social standing! Shocked, Livia has almost no time to consider the proposal as another problem arises just as quickly as the proposal...! This tale between the perfect nobleman and a lady-turned-villain is a love story you won't want to miss!

(Source: Frontier Works)