Disclaimer: I don't own Naruto or Fullmetal Alchemist
PROLOGUE
If anyone asked Sandiame when this could have possibly started, he would look at them and tell them of a time eight years after the Kyuubi attack, that the Anbu lost track of the child, Uzumaki Naruto.
It had started innocently enough. The Anbu would "accidentally" lose track of the child for a few hours, and then miraculously find him later on. But his time it was different. This time, this child had outwitted them and run off.
How you might ask. Simple. It was because of the Kyuubi. The Kyuubi was able to mask Naruto's chakra enough to appear that he was still asleep in his apartment.
None of them, not even Sandiame, knew what the motivation was behind this. Sure there were the villagers and their constant glares at the poor boy. But the way Naruto carried on, you would know that he wasn't even affected by them.
Anyway, Naruto had just seemed to disappear for a day. It left the old Hokage extremely worried, and he would later regret to say, not just for the boy's well being, but also for the village if someone should get his hands on the Kyuubi vessel.
It was around noon the next day that the Anbu squad finally caught sight of the child. He was seen wandering through one of the more abandoned streets, seemingly heading in no specific direction.
When he was brought before the Hokage, Naruto only managed to say a few words before he completely fell out of consciousness.
"..I-I wanted…to bring…him back. ..I didn't want…that to happen. My fault…. It was…equivalent exchange."