August 15th. A certain place. In a town where spirits that returned for the Bon Festival became visible, Takayoshi Nao looks for someone. It's the girl he loves, Aoi, who passed away half a year ago in a traffic accident. It's been three days since the strange phenomenon of seeing spirits began and Nao, once again, leaves flowers at the memorial where Aoi was taken. It was then when he saw a familiar figure.