ZERO: Black Blood - Shiro no Shō

Olga and Irina Kotov are sisters who lived amicably and happily in their village until the neighbor guy Vyacheslav appeared. They both fall in love with him at first sight. Slava chooses Irina, and Olga takes a desperate step - she turns to the local witch Glafira for a love spell. Glafira warns that the “Black Blood” potion will change the life of the entire family, and Olga’s short female happiness threatens to turn into a curse for the entire clan, from which it will be almost impossible to get rid of it. Only the death of an infinitely close person will remove it...