The ninja academy system of Fire Country is there to take young children and turn them into soldiers that will obey orders in the heat of battle and use powerful spells to destroy their enemies.
Raiko, Kirara, and Yayoi already know a great deal of what is being taught at the Konoha academy. The only thing they don't know… is who their comrades are.
And then they meet a boy named Uchiha Itachi. Fate, as they say, will not be denied.
What can be said about the meeting of the Iga heirs and the Uchiha heir? Actually, the explanation for why the Iga have more than one heir is quite important.
Nadeshiko took the pragmatic approach to clan-building. As such, she wrote into clan law the rules regarding inheritance and clan management. All children are counted by their mother's pregnancy, not the order of their birth- making her three daughters fathered by Jiraiya the only heirs she could ever have had.
This fact infuriates no less than a thousand different people in subtle ways every day. This fact is also why the change wrought in Uchiha Itachi at the Konoha academy could not, in all honesty, be undone- because the friends he made at the academy were politically equal to him.
They were also prodigious in their own right, but it would be some time before the truth of that statement would be widely known.