The flames burn because they will be separated. Aika is getting married. A childhood friend returns home to attend her wedding. The two were together from kindergarten to high school. They somehow thought they would always be by each other even after they became adults. However, before they knew it, the two were walking separate paths. Reunited, the man and woman reminisce about their memories and the Mirai. "I've always loved you..." "It's too late, you idiot..." Three days before the wedding. Life cannot be redone. The childhood friends have used up the time they have left...