Disclaimer: First Chapter
Story Start!

"Ooooooooooh! This is going to be exciting!"

"I know right, question, why are you 3 here to watch this!?" Kushina shouted both agreement and confusion when Lulu, Mii, and Milky were all present to watch a private family event. Lulu looked the same as he ever did, he was a fairy and they barely aged after they reached a certain point in their development.

Mii and Milky had both come into their own though.

18 and 16 years old respectively, they had matured into their adult bodies for the most part in the 4 years that had passed for the two of them. Elza wasn't there because she was even more of an adult, and had actually entered the workforce as a Succu-girl in her own right, though sometimes she would drop by for dinner.

"Naruto invited us."

Naruto's 17 birthday, the day he was an adult in the eyes of his parents, and the day that Minato wanted to see just how far that he had come along in his strength. Of course his friends wanted to see him being accepted as an adult by his parents, so that he could prove his strength to them and go out to become an adventurer, or whatever he wanted to become.

Minato was sitting on the ground, meditating.

Naruto was grinning in excitement.

Kushina was standing next to Minato, excited with her hands on her knees, crouched over and ready to fight her son. It was going to be a 2 on 1 game of Rasengan tag, where the goal was for Naruto to tag both of his parents with the Rasengan before Minato could tag him with the technique. The Rasengan was strong, but all 3 of them were strong enough to get hit by it and suffer from only casual injuries.

"Well... be prepared to be amazed."

"Oh, I already think you are quite amazing." Mii was laying on a log, stretched out over it with her body as sensual as ever. Her breasts had grown 3 times what they had been a mere 4 years previously, with her breasts now being larger than her own head... each of them being larger than her head.

Milky... was so huge she was obscene, but she was still shorter than Mii was.

Naruto had grown so that he was now taller than his mother by a few good centimeters, and his body was still filling out and growing. Kushina appreciated how much he had grown more than anyone though.

"Heh... I've been waiting a long time to see how far you've grown... are you as excited as I am for this Flaky?" Kushina pat her husband on the shoulder. "... your son is going to grow up to be a bigger and stronger man than you are... you must be proud." Kushina pounded her fist into her hand.

Minato stood up.

There were orange rings around his eyes, and when he opened them he showed off yellow toad eyes.

'I have 10 minutes like this, 5 minutes if I use a Big Ball Rasengan.' Minato was smiling and looking towards his son with pride.

Naruto copied his mother.

He pounded his fist into his palm, and like fire his body burst into golden chakra starting from his fists. Minato had activated his Sage Mode for the fight, showing that he was going to be taking this as seriously as possible. Minato stayed still so that he didn't use up any of his time, not even speaking to Naruto.

He conveyed it all with his smile.

Kushina pounded her fist into her hand a second time.

A bubbling red cloak appeared around her, her eyes turned blood red with slit pupils, and she grew thick whisker marks on her face that matched with Naruto's own. She gained 3 bubbling chakra tails behind her, the most that she could stay in control while using.

"YOSH!" Naruto and Kushina shouted to start the battle.

Start it did.

Naruto grinned and pulled his arm back.

"You still have a lot to learn son, you can't throw the Rasengan!" Kushina called out as she summoned chains out of her arms, and flung them towards Naruto. Minato responded with several kunai that he mixed in with her chains. Naruto formed a Rasengan above his hand behind his back.

He grinned.

The Rasengan chained as Naruto started to make the throw, growing 4 VERY LARGE bladed edges to it, and Minato couldn't stop himself from giving an awed look of pride when he saw the Rasengan evolve before his very eyes.

Naruto threw it.

"Wind Style: Rasenshuriken!"

Kushina just canceled out her chains and dodged the FAST attack that came for her and her husband, while Minato threw a kunai up in the air and teleported to it. He then followed up by teleporting to the kunai closest to Naruto. Kushina ran towards Naruto.

The ground shook.

Half of the forest behind Kushina and Minato had been erased from existence by the attack when it exploded, and the shockwave knocked all of Naruto's friends off of their seats. Kushina jumped up and extended her chakra tails AND chains down at Naruto from above. She played a supporting role for Minato as he charged up his Rasengan with a kunai in his free hand.

There was a flash and Naruto was gone.

It was like time slowed down for Minato when he saw that Naruto had moved faster than his own eyes could easily track, but he had managed to just barely track him. Naruto had run up into the air, running on top of Kushina's chains. In slow motion, she was raising her arms up to defend herself from Naruto's Rasengan as he started to charge it. Minato teleported back to the kunai in the air, which was right next to where Kushina had jumped. He landed on her chain as well right in front of Naruto.

Rasengans clashed.

All of them were knocked out of the air and onto the ground, landing perfectly on their feet.

One of the kunai still in the air was now behind Naruto, and Minato teleported to it with another Rasengan in his hand. He was inches away from Naruto's back. Naruto grew a chakra arm from his back and formed a Rasengan with it, blocking it with his own, the two attacks canceling each other out once more. Minato teleported to a kunai that was in front of Naruto, before he teleported 12 more times to kunai all around Naruto in order to try and confuse him.

But he caught a glimpse.

He saw Naruto's eyes.

Minato teleported back to Kushina just before Naruto made a grab for him, and Kushina was grinning with her eyes widened.

"He's done it... he's mastered Kurama's chakra... and Sage Mode... he's truly... he's truly surpassed us both." Kushina looked at Naruto's eyes, which had the rings of Sage Mode combined with the pupils of Kurama, forming a + mark in his eyes.

Minato couldn't stop himself.

He had to test this out.

"Big Ball Rasengan!" Minato created the larger Rasengan.

Naruto was even faster and stronger now, and he was already in front of them. Kushina had quick reactions and extended her chains out, and she tapped her foot on the ground to send out a sealing formula to paralyze Naruto for a quick second. Minato flicked a kunai upwards and teleported to it so that he was behind Naruto.

A wave of chakra rolled off of Naruto and destroyed the seal paralyzing him, it touched his mother in the stomash with a single finger, and he jumped before any attack could land. Naruto curled up, before he sent several chakra arms off of him and used Rasengans with ALL of them to destroy every kunai in the area except for the single one that Minato was holding.

Kushina dropped to her knees.

She returned to her base form.

-Inside Kushina-

"What... what is this?"

Kushina was shocked to see that Kurama inside of her was covered with a BUNCH of red gates, sealed off from her by a seal different than her own seal.

"He... broke your seal, and used a seal of his own... you can't use my power now unless he undoes the seal." Kurama told her, pinned down to the floor and unable to so much as move by all of the Torii gates that were restricting him and his ability to use chakra.

-Outside Kushina-

"He's..."

"How do you like my new Fuinjutsu!? I call it the Torii Seal, it's WAY stronger than the Eight Trigrams on me!" Naruto had used the Key to his own seal in order to create a new, stronger seal for Tailed Beasts and other sealed creatures. He created it for if his mother ever lost control, since Kurama inside of her still hated her guts and wanted her dead.

Kushina pulled her shirt up and looked at her stomach.

It was an Uzumaki spiral, but the design of her seal had changed, showing that Naruto had overwritten her seal with an even stronger one. It was even more complex than the seal on her had been, and it was crazy.

"I'm not helpless though!" Kushina responded by getting on her knees and slamming her hands into the ground. Chains left her body and entered the ground, before they popped up all over the field of battle at random locations. Minato touched her chains and applied his own seals on top of them as they moved.

He could teleport to the tip of any of her chains now.

Minato loved fighting by her side.

"Behold our new Combination Ninjutsu son! I call it the Minato and Kushina Flocking Spiral Flashing Chain Forest!"

"SO LONG! SO LAME!" Naruto and Kushina shouted out their dislike for the name of the new technique that Minato had come up with. Minato was appearing all over the battlefield, never staying at any chain for more than half a second.

Kushina recovered from her shame.

"Thunder God's Chain Forest is the new name!" Kushina directed her chains to go after Naruto, and Minato quickly closed in.

Naruto was gone.

He just vanished like he had never been there to begin with, because the Naruto that had been in the center of the technique, vanished in the blink of an eye as a puff of smoke.

An arm holding a Rasengan came out of the ground underneath Kushina, and with her chained to the ground for the technique, she was unable to dodge the technique. It hit her right between the breasts, putting a perfect spiral hole in her clothes as the Rasengan fizzled out right before it could do any fatal damage. All she had was a small spiral burn mark on her cleavage.

'Shadow Clone, and his real body was under the ground... we've been fighting his Shadow Clone this entire time... but he made a mistake, I've got a seal on Kushina's body.' Minato thought as Kushina smirked and made eye contact with him.

He teleported to Kushina.

The arm coming from the ground vanished in a puff of smoke before Minato could attack it with a Rasengan, showing that the Naruto in the ground had been a Shadow Clone as well. Kushina's smirk changed to shock when she felt her butt suddenly become lighter.

There was a puff of smoke.

Naruto had been her weapon's pouch the entire time, his real body had been at her side. Naruto grabbed Minato by the collar and punched him right in the stomach with a Rasengan, using the small gap between them as a way to stop Minato from escaping. He destroyed his father's vest, but fizzled out his Rasengan before anything but a spiral burn mark could be applied.

Naruto won.

Naruto's friends were blinking.

"Uh... what did we miss?" Milky frowned when the entire battlefield was turned into a wreck.

All she saw was a bunch of really fast flashes, explosions, and shouts of excitement, before the entire thing was cover. She wasn't the only confused one, because none of them could believe what they had seen.

Or rather what they couldn't see.

Seconds.

The battled happened in seconds.

"Here, let me fix that for you." Naruto touched his mother's seal and he loosened his Torii seal enough that Kurama inside could move again, though he was still in a cage now. A Torii seal cage. Kushina wrapped her arms around her son with tears in her eyes.

"You did it! You surpassed us! I'm so happy I got to see you become the fine ninja you've become!" Kushina was the happiest she had ever been.

Naruto hugged her back.

Minato was giddy with excitement.

"Hey Naruto, maybe you can teach me how you finished the Rasengan... how did you do it, how did you fuse an element to the Rasengan?" Minato couldn't believe that Naruto had kept THAT a secret from him, and he didn't even know how long Naruto had been keeping it quiet. Minato had been trying to figure out how to do that very same thing for years, but he had never once managed to get it to stay stable.

Naruto grinned at him, but was still hugging Kushina so he stayed silent.

Minato just rubbed the top of Naruto's head.

"Hey Naruto... what is 113 x 98."

"Numbers."

"Heh... my son is a fighting genius at least." Minato chuckled, and Kushina was laughing through her tears of joy. She was showering Naruto's face with motherly kisses.

It was a happy moment.

"Seriously... WHAT happened, I'm confused." Lulu shouted out, because to him, he couldn't even properly see any part of that fact. All he knew was that half a forest was gone, the ground was in tatters, and both Kushina and Minato were slowly healing from getting hit by Rasengans thanks to their different sources of accelerated healing.

Kurama for Kushina, and Senjutsu for Minato.

-Nearby-

"... Oh crap, I am glad I did not get involved in that." Jiraiya watched the fight with widened eyes.

His student had already surpassed him long ago, and now his own godson had surpassed him at the mere age of 17. It was hard for him to understand the insane potential that lay within Minato and Kushina's DNA, since it seemed like everyone in their family was just a bunch of power houses of combat potential.

Jiraiya took a deep breath.

'... Would Kushina kill me if I took Naruto to a Succu-joint to celebrate him becoming a man?' Jiraiya had to wonder that to himself.

Yes, she would.

He was going to do it anyway though.

Chapter End!
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