Shouzou and Ine Saitou are a long-married couple settled into their quiet life in Hirosaki when a strange apple from their own orchard leaves them waking up in the bodies of twenty-year-olds. Nothing else about them has changed: they are the same steady, devoted pair they have always been. Their family and neighbors, though, can't reconcile the grandparents they know with the two young strangers standing in the house.