"Kokudo Ou" is a hentai OVA series adapted from a Crossnet visual novel, following Isheildo (or Isiodore), the young king of the small mountainous principality of Bosarre, which lies between two powerful rival empires. To secure political alliances, both neighboring kingdoms send their princesses—Bellshil of Rohan and Ariel of Gerod—to live with him for a month and a half, during which he must choose one as his queen while both women go to extreme lengths to win his favor.