Kirie Goshima and her family live a very average existence in the village of Kurouzu-cho. She finds his father looking at a snail shell in an alley as she travels to the railway station to meet her lover, Shuuichi Saito. She doesn't think much of it and tells Shuuichi about it, who claims his father has been acting strange recently. Shuuichi expresses his growing desire to leave town with Kirie, claiming that the community has become infested with spirals.