As Kyōhei Kuga tries to live the life of a university student, his younger sister Utao Kuga comes to the city with Kukuri, her kakashi. Her reason for coming is that his friend Aki Kuga has escaped their village's prison and she wants to protect him. Soon after, Aki arrives with Kuramitsuha, his kakashi, and the confrontation with Utao causes serious damage to Kyōhei's apartment. Because of this, Kyōhei and Utao come to live with Hibino Shiba and her father, who came from the same village as Kyōhei. When Hibino's father says it is some sort of support from their village's shrine, Kyōhei begins to understand that he can never run away from his past.