Demon fox

Self realization.

Jiraiya sat and laughed at Hinata ran behind Naruto, her fists clenched and her byakugan flaring. "Pervert." She screamed. "I will kill you."

"I was just tagging along, I swear I didn't peek." Naruto screamed. "What the fuck did you teach her anyway? She hits like a bull." Naruto complained.

It was nearing the graduation of the academy and Jiraiya had finally returned. Naruto had taken time to meet his now identified god father, a few angry shouts and finger pointing later, Jiraiya had decided to ignore his complaints and peek at a bath house and here they were. With Hinata being the one who was one of those in the bath. She had swiftly changed and taken onto herself to bring damnation onto him.

The red tint around Hinata eyes didn't miss Naruto's sight nor did he miss her massive increase in strength. She was faster, stronger and he could almost make the rectangular bluish pupil over her pale eyes.

"Ha ha ha, it's a secret. I will teach you when you are ready." Jiraiya said with a haughty pride. Hinata was a perfect sage who far outclassed him and even Minato. Her control over natural energy was terrifying and the things the girl could do with it was horrifying.

Naruto vanished as he appeared beside Jiraiya, "I swear I didn't peek." Naruto gulped.

She was fast, gaining upon his location in the blink of an eye. Naruto didn't miss the chakra that seem to jacket her like an armor, fascinating.

His Kama came alive as he caught her fist. He absorbed the chakra from her fist, only to finch and jump black as his skin turned gray and rigid.

Hinata gasped and so did Jiraiya, standing up as he rushed towards Naruto.

Naruto froze stiff, eyes turning blue and yellow, the  game was over.

"What the fuck you think you are doing?" Roared the kyubi in his mind, but Naruto cared less, the seal on his belly slithered like black snakes, opening the flood gates to the vast and vile chakra that the kyubi held inside him.

Orange bubbled around him, sharpenibg in intensity just as fast as it rushed toward his hand and palm.
Naruto didn't miss the foreign chakra in his hand either, it was dangerous. Just a moment ago, it had hugged the hyuga heiress like qn armor and now it acted like a poison trying to invade him.

Naruto watched confused as the kyubi chakra failed to expel the other chakra, how xan it be so potent?...

"That is senjutsu, brat, the chakra of the nature. Get it off you before it turns you into stone." The kyubi roared inside him.

Horrified Naruto immediately summonned the kusanagi, the blade sharp and true as it plunged deep into his skin right below the elbow.

Hinats gagged, the steel blade was beneath the skin, and she could see Naruto skin his own hand, blood dark pitch, pouring off as he without a flinch cut into himself.

Naruto looked at his bare hand, letting the red and orange chakra food the wound, gasping he knelt, activating the kama yet again, pushing it until he felt the horn jutt out of his head.

Hinata made a face and watched in shock as the skin crawled over his muscles, his blood immediately stopping. "You idiot." She took his hand, closing her eyes a greenish glow covered her hand. "What did you do?" She yelled.

Medical Ninjutsu and this freaking power... she coukd kill me if she went at it. He pushed her hair away. "Hey, its fine, don't cry.." He whispered. "See!" He groaned as she disappeared in a shinshin.

"Idiot." Was all he heard.

"Look that wierd horn is really frwaking me out but I must ask."
Jiraiya smiled. "So are you guys a thing?" He took a breath of relief. "That's quite the regeneration. I have seen very few such example."