A young man Hiroshi Igarashi (Miyu Irino) is looking for a lost key chain after an earthquake that happened many years ago. While inside a school building he finds an old wooden box that contains the photo of two girls. To his surprise one of the girl (Saki Terashima) starts to communicate with him and informs him that the owner of the photo is a former art teacher and it is his duty to return the photo to the rightful owner.