Key: NarutoxKH Fanfiction
I've lost him... Naruto shook his head in disappointment. Sasuke stood before him, completely turned demonic, possessed by the seal and his desire for hate. They had been fighting constantly for thirty full minutes.
The worst part was was that Sasuke was lost completely: he couldn't be saved now. Why, Sasuke... Where has your heart gone? Naruto, with the assistance of a shadow clone, began a rasengan in his left hand. When did you become so... Heartless? He thought, Why can't I save you?
Sasuke, from his position on the other the other side of the side of the valley, began his own attack: a chidori of black energy cackling around his arm. "You can't stop me, Naruto."
Naruto and Sasuke threw themselves at eachother, attacks mingling with explosive force, and the two boys skirted across the waters surface like spiders.
Naruto gritted his teeth in frustration. I want to save him. He began charging another attack. I will save him. Naruto thought. Naruto charged at Sasuke again. "I MUST SAVE YOU!" Naruto roared. "SASUKE!!!"
The attacks collided, and Naruto was blasted back and enveloped in a flash of red light as he slipped into unconciousness.
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Naruto awoke in a different place. Not in a warm hospital bed, not in the aftermath of Naruto's and Sasuke's collision, but in the dark, dank sewer of his own interior. Before him were massive bars, reaching for the pulsating red and blue chakra veins that routed onto the other side, and before it was a sign with a single katakana symbolizing "seal".
A dark grumbling came from beyond the bars, sounding more like a growl of greeting than any else. "Ah, it's Naruto-kun. How nice it is to see you again... Not." There was a hurr of laughter emanating from the abyss. "Why don't you let me out, eh? I could help you save Sasuke for good."
Naruto shook his head silently, knowing how deceptful this powerful being, the Kyuubi, can be, yet it posed an interesting point and it oozed with truth. It COULD help Naruto save Sasuke.
"What is happening to Sasuke!?" Naruto demanded to know. Naruto fearlessly walked closer to the cage.
"Sasuke has become a Heartless." The Kyuubi said blatantly, "His heart is gone now. Only his darkness remains in him, and he is possessed by it."
"What the hell is a Heartless?" Naruto yelled. "What can I do to save him? I need your help Kyuubi!" Naruto shook the bars of the massive cage.
"You cannot save him: only he himself or perhaps his Nobody can do that. The quickest solution is to kill him." Kyuubi hurred in agreement to that. "As for the Heartless Nobody thing, those two are the byproducts of losing your heart. You too are actually a Heartless." The Kyuubi nodded.
"Me?!" Naruto exclaimed, doubletaking incredulously.
"No, Bob over there." Kyuubi said sarcastically. "When you were but a newborn, your father was forced to seal me in his only child. However, my power was too strong for your puny body to handle, even with a six pronged seal to hold me in. So, your father was forced to remove your heart and replace it with my presence.
"You have a Nobody, somewhere out there, and when you two meet together again, you both reunite, you will have your heart again." Kyuubi said. "Things won't go smoothly though."
"Then why don't I look like Sasuke?" Naruto ruflled his hair in confusion.
"You're father saw to it that your darkness was removed with your heart so you won't become corrupted. Your Nobody carries your darkness on his shoulders."
Naruto winced. "How am I supposed to defeat a Heartless or a Nobody? All my attacks on Sasuke bounced off him like he was made of rubber!" Naruto frowned.
"Your father left you a weapon to fight the Heartless in case you needed it. I'll only tell you if you Release me."
"How about you tell me anyways, or else." Naruto threatened.
Kyuubi frowned. "Just concentrate on your left hand it will appear. Now get out.
Naruto was flung back into conciousness, and he stood unsteadily as Sasuke began walking away towards Otogakure.
"Sasuke!" Naruto yelled. "I WILL SAVE YOU!" and with that, a Key appeared in his hand.