"Kiyoneko" is a supernatural drama set in a small, rural Japanese town where folklore and modern life intertwine. The narrative centers on Kiyoko, a reserved high school student who discovers she is the reincarnation of a mystical cat spirit tasked with maintaining the balance between the human and spirit worlds. This revelation comes after she encounters a mysterious boy named Haruto, who claims to be a guardian spirit sent to guide her. Together, they uncover a growing disturbance caused by malevolent spirits escaping into the human realm, threatening both worlds.

The plot unfolds as Kiyoko and Haruto investigate the source of the imbalance, which is linked to an ancient shrine on the outskirts of town. The shrine, once a gateway between realms, has been neglected, allowing dark forces to seep through. As Kiyoko learns to harness her newfound abilities, she faces challenges from both the spirit world and her own community, where skepticism and fear of the supernatural create tension. Her journey is further complicated by her struggle to reconcile her human life with her spiritual duties, as well as her growing bond with Haruto, whose own past holds secrets tied to the shrine.

Supporting characters include Kiyoko’s childhood friend, Yumi, who provides emotional grounding and a human perspective, and an enigmatic priestess, Ayame, who serves as a mentor figure with her own agenda. The series explores themes of identity, responsibility, and the clash between tradition and modernity, all while maintaining a focus on the central conflict of restoring harmony between worlds. The story builds toward a climactic confrontation at the shrine, where Kiyoko must fully embrace her role as the cat spirit to prevent a catastrophic merging of realms. The resolution leaves room for reflection on the enduring connection between humans and the spiritual forces that shape their lives.