The Kouga Ninja Scrolls

The uneasy truce between the Iga and Kouga clans is dissolved by Shogun Ieyasu Tokugawa, who decrees that ten ninja warriors from each clan must fight to the death in order to determine who will be the next shogun, but in the midst of war, an unlikely romance blossoms between star-crossed lovers Gennosuke of the Kouga and Oboro of the Iga, in the classic novel that inspired the Basilisk manga series. Original.