Rio has left the village of the People of the Spirits and headed for his parents' homeland, Yaugumo. Unable to find any information on them, Rio searches and encounters the head of a small village in the Karasuki Kingdom, Yuba. When Rio tells Yuba the names of his parents, she's shocked—she and Rio have a profound connection. At Yuba's recommendation, Rio decides to live in the village and so a quiet, happy life alongside the villagers, including his cousin Ruri and a girl named Sayo, begins. Before long, the season turns to autumn, and they hear that the tax examiner will soon arrive to determine the amount of their annual tribute. Then, one day, Sayo's older brother Shin gets into a fight with men from the neighboring village.

Rio and the others have traveled to the royal capital of the Kingdom of Karasuki with the village's annual tribute as guards. With their duties fulfilled, Rio and Sayo head into the castle town. They enjoy a meal and are doing some shopping when wandering warriors attempt to abduct a young girl. Rio jumps into the fray and easily defeats them, saving the girl. Her name is Komomo and she's the tax examiner Hayate's younger sister. Hayate's father Gouki receives a letter from Yuba. What he reads astonishes him and he and his wife, Kayoko, visit the lodgings where Rio is staying. They reveal to Rio that they once served his mother, Ayame.