Akuyaku Ouji no Eiyuutan

Alfred, the third prince of the royal family who was born with black hair and black eyes, was hated. One day, he comes across his older brother, the first prince, Leolu, announcing to his fiancée, Charlotte, that he has broken off their engagement. In order to save Charlotte, who was falsely accused, Alfred took her place and thought the situation was settled...?! A reversal of heroic fantasy begins with a villainous prince who used to be a shady person!