Nanafa Kyan resides in Okinawa alongside her grandmother, who operates the "Kame Soba" soba shop, her attractive older sister Nao, a high school student, and her younger sister Kokona, an elementary schooler with a keen ability to sense the supernatural. One day, Nanafa observes a seal falling from a Chinese banyan tree, releasing three spirits dwelling within it. Among them are Niina and Raana, who are "jimunaa" spirits, and Iina, an incarnation of an Okinawan lion statue. As spirits begin to appear one after another, the tranquil life of Nanafa and her family starts to change.