A loner at school, middle-school student Chūta Kokonose has long been regarded odd and the subject of ridicule among his classmates due to the fact that he constantly talks to what appears to himself. The truth is that Chūta has a voice inside him that only he can hear, prompting him to reply and talk back at it. During home economics class, he meets and develops a crush on the popular girl Misuzu Sonokata, who immediately dislikes him...