Sengoku Blood

Born as twins into the Oda household, Karin is cast aside as an unwanted child. Her brother, Oda Nobunaga, is the one person who gives her strength as she grows up. As adults, Nobunaga pursues world domination to unite the world and create a happy place for his subjects and his sister. Then Nobunaga is attacked and murdered in his palace. At his deathbed, Karin vows to carry on his dream in his place, even if doing so means making a deal with a demon.