His story follows a schoolgirl named Akari Tokimiya and the fantastical adventure which occurs when she visits the memorial service of her grandfather Kenzo, a master special effects man. She has unhappy memories of the old man and his passion projects, the last of which he died during the making of. At the memorial service, she meets classmate Takuya, a tokusatsu superfan, and a strange person named Hozumi, the star of the movie Kenzo was making when he died. Hozumi has with him a prop from the film, the titular “Brush of the God,” which transports Akari and Takuya into the world of the movie where they face fearsome Kaiju, including the legendary Yamata-no-orochi who is attempting to destroy everything. If they are to survive and get back to their homes, Akari and Takuya must find out the secret of the movie.