Wagnaria manager Hyogo Otoo brings back a mysterious girl who says her name is Aoi Yamada and is 16 years old, the same age as Sota. Although Popura and Inami accept Aoi as a new member of Wagnaria, Sota has his reservations. Aoi constantly exhibits clumsiness and a lack of common sense, and as a result Sota and Jun take an immediate disliking to her. Yachiyo befriends Aoi, whom she takes to be a mother-figure, while Otoo is labelled as her father-figure. Aoi tells Yachiyo that Jun has feelings for her, which later culminates in a disastrous confession by Jun and a denial by Yachiyo. Popura gets the two of them together the next day, where Jun decides to tell her a subtle white lie to calm Yachiyo down.