Adult PC Game: Covenant of Morn - v0.5.1 by 395games Archive

You are resurrected by a white-haired witch that offers you a deal.
Her blood to keep you alive, in return for helping her with an important mission.
A mission to murder her very own sister.
Soon you are plunged into a world full of magic and mystery, learn that there is more to it all than meets the eye and that receiving "her blood"
means sharing the witches bed.