After it is revealed that Mio has the weakest Imagination of the group, they try to teach her how to improve her Imagination. However, the appearance of Hammer Shadow and the strange creature Mikey complicate plans.

Tokatti and Kagura uncover a Shadow Line plot to make children unusually happy, but Kagura must also deal with the young girl Aoi who says her brother has been kidnapped by the Kuliners taking children throughout the city.