Disclaimer: Masashi Kishimoto owns the Naruto manga.
WARNING: Spoilers through Ch.425 of the manga
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Death was not as Kakashi had always imagined it. It was odd, and it was dark. The last thing he remembered was using the Mangekyou to save Chouji; beyond that… nothing. All he could hope was the his sacrifice hadn't been in vain. He felt at himself; the nail Pain had lodged in him was gone. In fact, he'd never felt so good… until he remembered the whole death thing.
He stood up to look around at this new place. Blackness stretched around him for leagues upon infinite leagues, a neverending plane of the void. A vague sense of disappointment pulled the bottom out of his stomach. He had hoped, begged, prayed with his dying breath to see Obito and Rin, one more time, and they weren't here. As far as he could see, nobody was.
As he stood, thinking of Obito, Rin, and Namikaze-sensei, he began to feel pulled. To where or what, or even when, he was not certain, but… away. He started to walk forward, following this sensation, when a light caught his eyes. He turned. Not twenty feet from him, a man sat on a rock, facing a fire that had not been there second before. Kakashi wasn't sure why, but the man seemed to be familiar.
"That you, Kakashi…? The man said, turning. Kakashi walked towards him, knowing full well who he was
"So this is where you've been," Hatake Sakumo. The name remained unsaid.
"Will you tell me about yourself?" Sakumo asked, as Kakashi sat down on a second rock, facing into the fire.
"Sure… It'll take a long time, but I want to tell you everything."
"Yeah, all right."
"So, Dad…" Kakashi started.
He told his father a story of loss, of grief, the story of his own squad. He told of the ANBU, his missions, the loves and losses of his adult life, and he told the story of the hyperactive loser ninja to whom Konoha looked for the future. And as he talked, and as he connected with his father, he realized that, perhaps, eternity could wait.