Akuyaku Reijou Koukyuu Monogatari

Diana, daughter of the notorious Count Cresta, unwillingly enters the Palace Harem as "Lady Crimson Rose," the primary candidate for the queen consort. But, due to her "villainous face" and beauty that is said to be able to manipulate the hearts of men, she is hated by the King, caught in power struggles between concubines, and misunderstood in every way! "I wish I could meet someone who sees me, not for my appearance, but for who I truly am!" The chronicles of a "villainous-looking" young lady's struggles in the Palace Harem and how she finds her own way to persevere... no matter what!

(Source: MangaPlaza)