Iruka watched the teen run… He'd tried to explain, but it didn't work out. Mizuki was dead, Naruto was running… Today just wasn't a good day.
Possibly Demonic Author style: Flashback
"I killed him… I really am the demon fox… But he was sealed inside me, so how can I be him? It doesn't matter, I guess… I can't stay here. Goodbye, Iruka-sensei…" He turned and began to walk away.
"Wait, Naruto! Stop! Don't do this… It isn't your fault!"
He saw it clearly wasn't working, and decided to change tactics. "You only know half of the truth!"
THAT had made the boy stop. He turned around, facing his teacher. "What do you mean, 'I only know half the truth'?"
It was clear that Iruka was desparate… "You already know one S-class secret about yourself… You might as well know the other. Since you're deciding to leave, it's possible this will make you stay… Your father was Namikaze Minato, the Yondaime Hokage… And now that I've told you, I'll be dead by noon tomorrow…" Naruto's expression was not of shock, it was more akin to acceptance.
"I hope we meet again someday, sensei… Truly, I do. If you are executed, tell them… Tell them the truth. Tell them this…" He proceeded to tell Iruka the words, writing them down. Iruka nodded silently.
End Flashback
Naruto ran, and did it fast; he had activated his father's bloodline… It gave him exponential growth in all things he wanted: height, metabolism, muscle, speed… He would get out of the Land of Fire in a couple weeks, but where to then?
'Go to Kumogakure…'
'Why Kumo?'
'There are two other Jinchuriki who live there… Friends of mine, actually.'
So Naruto changed course, heading for the Village of Those Who Hide in the Clouds…
"I hope that Iruka's alright…"
He most definitely was NOT alright. "Any last words?" Iruka gave a ridiculously cheery smile reminiscent of the blonde student he'd taught…
"As a matter of fact, I do. They're in a scroll in my back pocket… If you could be so kind?" He was allowed to get them. He held it up to the light, reading it.
"The Yellow Flash is gone… You treated his son like garbage, all of you did, except for the Hokage and a few of the Anbu… And now that his son is gone, I can openly say it, especially since I'm condemned anyway… Namikaze Naruto, the Jinchuriki no Kyubi no Kitsune no Yoko, the savior of our village… He isn't dead, fools! He's headed for another country, and he never told me which one specifically… But if he comes back and kills you all, then it's no less than you would deserve… An eye for an eye, no? By the way, two more things… Naruto's the one who wrote this pretty little speech… And only I can say when it is that my life is over…" Lightning fast, he took out a shuriken and slit his own throat. He died, and as his eyes glazed over in death, he gave off that trademark smile of his…
And that's when the crowd went into an uproar.