Souji has moved back to his hometown, carrying a mix of excitement for the new start and mild sadness that it is not the same place he left. His first errand—a quick trip to the convenience store—produces something unexpected: the girl at the entrance calls him "Sou-kun," a nickname he has not heard since childhood. It is Kanade, his childhood friend, grown into someone he almost does not recognize. The chance encounter between them revives something that had been half-buried for years.