Sengoku † Koihime EX 1 ~Oushuu no Dokugan Ryuu Hen~

In order to exterminate the demons that have spread throughout Hinomoto, the Hinomoto Alliance has united the forces of powerful daimyo under the banner of Nitta Kensuke, a celestial being who has been transported from the modern era. To fight the ongoing damage caused by demons in various places, they aimed to further expand their allied forces. While Oda Nobunaga and his men were enjoying a brief period of peace, they received news from Satake Yoshishige in the Tohoku region that Date Masamune had turned into a demon and was attacking Hitachi. What awaits them in the Tohoku region?