Erin is a 10-year-old girl living with her mother in the Tai Koh Region. She has a deep love for animals, particularly Touda - powerful dragon-like creatures used in battles. Erin's mother, Soyon, is a member of the Mist People, known for their green eyes. Due to Erin's father, who was the chief of a Touda breeding village, passing away, Soyon and Erin now live there, with Soyon serving as the chief Touda doctor. However, when the Duke's strongest Touda, Kiba, mysteriously dies one night, Erin's life takes an unexpected turn, thrusting her into the fate of the entire nation. The series follows Erin's journey from childhood to adulthood, and Volume 11 includes the one-shot, Ryokui no Hito.
