The Cry of the War Drum

In times of war, information was precious. When an old informant shows up in what remains of the Konohagakure no Sato after Pein's invasion with information that is crucial in these troubled times, Naruto gives her a rather cold welcoming. Why? What happened between the two of them and how will the past influence the future? Mature-but-hopefully-not-too-mature!SealMaster!Naruto.