Diabolik Lovers- A New Arrival

Yui has just returned from the Mukami mansion, to see if Ruki healed. She finds a young lady in the living room at the Sakimaki mansion. The girl's name is Aria, and hails from an unknown kingdom. The Sakimaki brothers soon find she is immune to their charms, and has blood that is worthy of Eve. But the girl harbors a terrible past... A past belonging to a witch. To be specific, the Witch of the North.