When Suguru Koshigaya unexpectedly wins Okinawa trip tickets at a department store, the girls of Asahigaoka dive into preparations with gusto. From mastering airplane etiquette to stocking up on travel necessities, they leave no stone unturned. For Renge Miyauchi, venturing beyond her familiar surroundings sparks contemplation about the potential shifts in her worldview. As the departure date looms closer, a significant promise binds their exciting journey together.