Hina Ryusaki, the mayor of Yozakura Town and half-dragon, half-human, possesses the power to banish mischievous yōkai back to their world. Together with her secretary Satori, she faces the growing number of troublemaking yōkai in the town. One day, a man named Genzō Shiranui appears, demanding she relinquish her position as mayor. Genzō's true goal is to turn Yozakura Town into a town solely for yōkai. To stop his scheme, Hina confronts him, only to discover his true form is Nurarihyon, a yōkai with immense supernatural power. Hina now faces her greatest challenge yet.