Kyuuketsu Ouji to Ikenie Hanayome

The vampire prince and the sacrificial bride Meirin An is born into a prestigious family, but after losing both of her parents, her home gets taken over by a branch family, she faces mistreatment from them, and they use the presence of her sickly young brother to ensure her compliance. The branch family’s daughter, Shuusetsu, takes Meirin’s place and becomes engaged to the Third Prince, Tenga Rokuou. However, Tenga’s true identity turns out to be that of…a despised and feared vampire?! What awaits the ill fated young girl is the devotion of a complicated vampire with secrets of his own??! A royal court fantasy that begins with a contract marriage!