After earthquakes suddenly took place in the Kumamoto Prefecture, Natsuna Keyaki lost contact with her dearest online friend, Itsuki. With nothing but a drawn picture of the landscape, Natsuna embarks on a journey from Tokyo to Kumamoto to find her. When Natsuna gets lost in a rural area of the disaster-stricken prefecture, she encounters a policeman and an energetic middle school girl named Izumi Chiba. Izumi, along...