Disclaimer: First Chapter
Story Start!
No luck.
Karin Uzumaki was gone, having left Konoha already when her team failed the Chunin exams. The hotel she was staying at confirmed that all the Grass Ninja in the exams had already left the village, meaning that there was no way Naruto would be able to catch up to Karin and talk with her now that she was gone.
"This sucks..." Naruto groaned as he sat down in his apartment.
"Nice place you've got here all alone." Tenten commented as she sat on his bed without a care in the world. It was a little dirty, with some ramen cups on the floor, but they were slurped clean to the point they were bone dry.
Guy liked ramen a lot.
"I'm sure that you're meet her some day. Family has this thing about coming around when you don't expect them." Erza comforted Naruto with a hand that phased through his body. Naruto shivered a little at the feeling of her passing through him. He could feel her right down to his chakra, like her soul was messing with his chakra directly by coming into contact with him. "Woah... that felt odd." Erza stated with a shiver of her own.
"Woah, a couple more of your hairs turned red." Tenten stated as she looked at the back of Naruto's head.
He just groaned.
"Fine... I don't even care about my hair color. I've always liked red hair anyway." Naruto didn't care in the slightest if he lost his blond hair, the more he thought about it. He actually liked red hair, so having straight red hair wouldn't bother him too much. "Oh, I better..." Naruto raised his hand.
The gauntlet covering his hand vanished in a golden light.
"Hmmmm?" Erza hummed as she thought about Naruto's slow transformation, and how it seemed to coincide with her magic and his chakra mingling together. Since her ghost had some of her magic, and the changes started when Naruto made use of her magical powers, and his chakra pathways extended into the hand he took from her. She was trying to analyze what it all meant, and if maybe it was her fault his body was changing.
Her fault... or maybe puberty?
"I want some cake... ramen. I want some ramen." Naruto stated as he shook his head. "Sorry for dragging you around all day Tenten... want some ramen?" Naruto asked her with a dull tone.
He was a little depressed he didn't find Karin Uzumaki.
"No, I think you want cake." Erza insisted of Naruto as he started to boil water for the ramen. "Cake, strawberry cake... or at least something sweet or tart." Erza tried to convince Naruto to get her prefered foods by acting like a ghost whispering into his ear.
Tenten just looked at Naruto's hand with a raised eyebrow.
She glanced and saw one of his eyes was brown as well.
"So... your Kekkei Genkai lets you summon armor and weapons right? You're not just using a seal to store an item, and summoning them like I do?" Tenten asked as she pulled out a scroll, and she unrolled it to show the symbols inside of it. She placed her hand over one of the symbols, and in a poof of smoke, she was holding a katana in her hand. She instantly sealed it away again in an instant.
Yet, when he did it the armor glowed and vanished, different than what seals do.
Naruto took his jacket off, and he extended his hand towards Tenten. The area around his arm glowed golden in the shape of the armor, before the glow vanished and the armor was on his hand again. This time he was holding a sword in his hand, and he ignited the blade into flames.
"Don't tell Neji... though he's your teammate..." Naruto grumbled when he realized that him revealing his own abilities to Neji earlier might have been a bad idea. His hindsight was telling him that revealing such a thing would for sure was a bad idea for him. The least he could do was ask for Tenten not to reveal anymore information.
He doubted she would hide it though.
Tenten gazed at the weapon with her eyes filled with stars.
"So cool, and I don't feel you using ANY chakra to make it burst into flames like that! So this is your Kekkei Genkai... though I have to ask why your right hand seems different... the skin color is a little off. Your hand seems a little more feminine too..." Tenten grabbed his hand and gave it a critical eye. She looked at the skin on his hand, and noticed that the skin was a lighter color than the rest of his body. The change in skin color was different enough to notice, and it went all the way up to 3/4ths of the way up to his elbow.
She touched Naruto's hand, and she felt how soft his hand was, and she amused herself with comparing it to her hand.
This was a woman's hand.
This was clearly not a man, or even a young man's hand. The sizes of Naruto's hand and this hand were about the same, but the subtle details were different enough that she could clearly see a gender difference.
"I lost my arm and eye in training, these were the closest replacements I could find. I need to keep them though." Naruto glanced at Erza, since he didn't know what would happen to her ghost if he were to lose her arm and eye.
It was kind of nice to have her around.
"Well, this could be a bit of a problem then." Tenten looked at Naruto's hand some more. "The bones aren't genetically yours, or related to you. Since bone marrow produces blood cells, if this arm was attached to you then right now the blood from this person will flow through your veins. As times goes on, more blood from this hand will enter your body as it produces more and more." Tenten explained to Naruto.
She had studied to be a medical ninja once, but since she had shitty chakra control, and no talent for medical ninjutsu at all, she had to give that up. All the studying she did about the body was for nothing.
She had no chance of being a medical ninja like her idol.
"Huh?" Naruto and Erza stated in unison.
"Well, over your entire body, all your bones produce about 200 billion new red blood cells. With this hand, about 1/15th of your body is producing this woman's blood and putting it into your body." Tenten explained as she took one of her kunai and pricked her finger enough to let some of her blood drip onto Naruto's hand. She spread it further up his arm, and she made her point with a physical examble.
Naruto just looked at Erza.
Erza was understanding it though.
"My blood has magical properties, and since your chakra pathways are deeply connected with your body, I believe my magical power and your chakra are mingling together." Erza mused to herself as she thought about this. Naruto was getting a constant and stable supply of her blood into his body, and his chakra system was getting a good supply of her magic to it.
Her magic and DNA was literally being injected into every part of his body, constantly and without any rest.
"I don't understand." Naruto wasn't book smart.
Sue him.
"Well, in Medical Ninjutsu, it's understood that for a ninja with chakra, it's kind of dangerous to have somebody elses blood in your body. In surgery, blood transfusions and organ transplants are nearly always done between blood relatives. In emergencies, a medical ninja will cut off the patients hair and use it to heal the wounds." Tenten explained to Naruto.
She understood the theory behind it, but she was still had shitty chakra control and no talent for medical ninjutsu. All her medical ninjutsu knowledge was completely useless to her giving that she would never be able to use it.
"Well Tenten, why is that?" Erza asked with crossed arms.
"Why is it dangerous Tenten?" Naruto asked for Erza's sake, since he couldn't care less about any of this.
"No clue, the books don't say why it's dangerous. Just that it can be dangerous for us ninja to have other's blood and DNA in our bodies. Since you're still alive, it shouldn't be fatal or anything. Our chakra is super spiritual and physical, because we use it to manipulate those energies... so our chakra mixing with DNA from other people might effect us or something?" Tenten had no clue what to think after that. It was just dangerous to do transplants and take in other DNA for most ninja.
It was done with family because of genetic compatibility, and how the chakra of family members was often very similar to each other.
"I see... that can have an effect on our body." Erza realized just how this was.
Her body didn't have chakra, so her body wasn't going to be effected by the changes.
"Huh?" Naruto asked Erza as he glanced at her.
"Red Blood cells carry oxygen to every cell in the body, and they come into contact with all of the bodies cells as a result. It also takes away carbon dioxide waste away from the cells, so right now the blood cells my arm is producing are making contact with all of your cells. My genetic material is mixing together with your chakra enfused cells, and my DNA is getting mixed together with your genetic code." Erza explained now that she had her own theory on what was going on.
Naruto's red hair.
If the Uzumaki clan had red hair, and she herself had red hair, that would be the first thing to change in Naruto. Their genetic similarities would be the first things to make changes, since his DNA would recognize her own DNA as similar in certain aspects. Since it would seem that they did have some genetic similarities to start with.
"You're talking too smart." Naruto told her.
"Who are you talking too?" Tenten asked Naruto with a tilted head, realizing that he wasn't talking to her anymore.
He blinked.
"Blood serves multiple functions, such as supplying the body with fuel, hormones, and carrying away waste. Right now, your blood has your chakra in it. My blood right now also have your chakra in it, and both of our blood is mixing together... your chakra is causing your body to match my DNA since your chakra is mixed into both of our blood." Erza explained to Naruto, and he looked away from Tenten to look at Erza. "... Swirl icecream that melts into one flavor." Erza explained simply.
...
"Oh! I get it, right now me and Erza are chocolate and vanilla, but as times goes on her chocolate is melting into my vanilla and my body is changing." Naruto understood that, and Erza puffed her chest out in pride, happy that she had been able to make him understand.
Naruto was vanilla, his young body still developing.
Erza was chocolate, her grown body done developing.
As the two flavors mixed together, the end result would look far more like chocolate, if not a lighter flavor of chocolate.
Naruto's right hand producing Erza's blood, that blood being given Naruto's chakra, and that blood transporting chakra and nutrients to the rest of Naruto's body was the start of his body changing. Right now, since Naruto had dormant red hair genes, that was the first thing that would change.
"WAIT!? I'm going to look more and more like you!?" Naruto jumped in shock and confusion when he realized something.
Erza was a girl.
He was a boy.
"Oh... oh right. That's not good, my blood is causing changes in your brain, and not only is your body changing... but you brain is going to start producing female hormones in greater amounts. As time goes on, you might even start producing less of your own blood and more of mine." Erza muttered with her expression quite grim. She didn't know giving Naruto had arm and eye would have this much of an effect on him.
No, it was worse.
Her eye was directed connected to his brain, the human brain's optic nerve started at the front of the brain, and ended at the back of the brain. Right now, his body was already producing Erza's hormones thanks to his direct connection to her genetic material touching his brain.
This would be fine if they were both boys.
Erza was a woman who produced a LOT more hormones than a young girl, since she had died an adult woman in the prime of her youth. Right now, Naruto's body was starting to produce adult levels of hormones, while also producing the hormones of puberty.
Combined with her right hand sending her blood cells to the rest of his body, prepping his body for the changes, it was impossible to tell just how severe these changes would be. If the hair was any indicator, the changes were stable enough that his body wouldn't mutate into anything hideous.
"I've got a girl's arm and a girl's eye! I'm vanilla, and I'm turning into chocolate! I don't want to grow tits, I don't want to have Erza's big butt!" Naruto panicked as he grabbed his head in his hands.
...
"I don't know what is going on." Tenten explained to him. "Please calm down and explain this to me, because right now you're freaking out." Tenten asked him nicely enough.
Erza could feel Naruto's panic over this.
"Naruto, you're freaking out Tenten. I understand why you are panicking, but panicking now won't change anything. It seems the more you use chakra, and the more you use magic, the faster the changes happen. If you get your blood pumping too much, that could cause the changes to spread faster too." Erza encouraged him to calm himself.
Naruto took some breaths.
Tenten waited.
"... You good?" Tenten asked when the color in his cheeks returned to normal. She was talking in a deadpan way, since she still didn't know what had caused him to freak out so much. "So what is going on? Who are you talking too?" Tenten asked with a look around.
Was there an invisible ninja somewhere?
"... A ghost... the woman who gave me this eye and this arm. When Pervy Sage through me down a canyon, my life was in a lot of danger and I saw her... she freaked me out and ended up with me losing my body parts. She replaced them with her own, and now I'm getting access to her stuff... but according to you and her, my body is going to change." Naruto didn't have a long story to explain away. It was actually pretty short, and Tenten looked at him like she didn't really believe him.
That sounded hard to believe in general.
Naruto stood up, and all of his clothes started to glow.
-10 Minutes Later-
"... Sexy..." Tenten stated as Naruto was back to his normal clothes, his cheeks really red from what he had just done. Tenten's nose was bleeding a little from what she had just seen, and she had a bit of a grin on her face. "So... there is a ghost in the room now, and she owns those sexy armors. Also, yeah I see why you are panicking now." Tenten could understand why Naruto was so panicked moments ago.
She also saw that a little more of his hair was now red, to the point he did have a noticable little chunk of straight red hair on the side of his head. The skin color on his right hand extended just a little more up his arm.
"So I was right, chakra and magic cause the transformation to speed up." Erza muttered out loud, and Naruto just closed his eyes.
Hokage.
"I'm still going to become Hokage... I told the scar bastard that I would do it even if I had to stay a Genin forever... and I can still become Hokage even if my body changes. Though I want to slow down the changes-"
"Meh, this Erza chick sounds really sexy... so why not just accept the changes? Tell you what, if you turn into a hottie, I'm not against throwing you some dates." Tenten grinned as she spoke.
She had always been told by her friends that she had the mind of a dirty old man, and that she acted like a boy quite a bit. She saw nothing wrong with any of this, but honestly, Naruto's story was super interesting.
This entire situation was interesting.
She wanted to see what would happen.
Chapter End!
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