A marriage between a demon and a human, transcending their races. What will be the outcome of the harem surrounding the Demon King? To end the conflict between humanity and the demon race, the Demon King decides to take a human bride. The princess knight, the hero, the priest, the witch, and the maid—each candidate has their own motives intertwined in this harem. When will the resolution come!? Who will be the heroine chosen by the Demon King?