Disclaimer: First Chapter
Story Start!

Grogginess.

Jiraiya woke up feeling more groggy than he ever had in his life, and very disoriented in general. His eyes snapped open though, before he relaxed at being alive at all. He raised his arm up, and looked at his bandaged stump, with a sigh he just figured he would have to learn to use ninjutsu with one hand instead of two from now on. There was a crackle of a fireplace, and he slowly sat up in the futon he was sleeping on.

"It smells like cum in here... I didn't..." Jiraiya could smell cum, so he checked himself. He didn't remember having any wet dreams, but he wouldn't put it past himself. He checked, and the smell wasn't coming from him. He looked around the room, and he saw a doctor was sitting at a desk and looking through a microscope at a white fluid.

Cum.

His cum.

"Oh, you could have waited until I was-"

"Sir, it isn't your cum, you are much too old to be suitable. Your blood work was quite interesting. No, I'm studying the sperm of your young student. Seeing as you've been asleep for a week and a half while you were recovering, he's been selling his cum to the hospital to pay for your medical bills." The doctor had worked out a deal with Naruto. As long as he sold his cum to her so that she could study it, and then distribute it to the other women of the village (not that he knew she was doing that), then she would write off most of debt that he owed them for Jiraiya's bills.

Jiraiya sighed in relief.

So Naruto was okay, that was good.

"Why do you even want that stuff?" Jiraiya asked, gathering intel through casual conversation.

"My species can only really get pregnant between the mid-teens and mid-twenties, and after 20 the chances go way down. I hope that researching his superior semen will lead to the development of good fertility drugs. I've never seen human sperm so... amazing in quality." The woman didn't have anything to hide from Jiraiya, so she spoke without even looking in his direction. She was taking notes on what she was seeing.

Jiraiya noted down several things.

She mentioned his humanity, and her species, so she wasn't a human. Yet the existence of humans was also confirmed by that statement. So, she was part of a species that were similar to humans, but were not humans. Researching human sperm implied that her species would regularly crossbreed with humans.

"Not one for the men of your species?" Jiraiya asked.

"My species has no men of our own, when we give birth to males, they are always just humans who are more resistant to the cold, and they are so rarely born they might as well not exist." The doctor was smart enough to see that Jiraiya was pressing her for information, but she had nothing to hide about her species. She raised an eyebrow at Jiraiya's happy and perverse smile when she mentioned no men.

"So, you women need a stud horse to get things moving, well, if I must-"

"I must insist you calm down sir. You are much too old. The women who can still give birth are between the ages of 13 and 27. My species are facing a declining birthrate, but we aren't so desperate as to just sleep with any man, especially one more than twice our age... or even 5 times their age." The doctor raised a hand to object to that line of thought. Only the most desperate of girls would try and go for Jiraiya, due to his age and his very clear perverted motives. He had just been awake for mere minutes, and she could already see that the man was lust incarnate for a human.

Jiraiya was let down, but nodded his head.

"Where is Naruto?"

"He's training, he trains himself to the bone every night, and then comes back the next morning to get his hands healed. You've got yourself a dedicated student... he works himself to the point his hands bleed, and he faces severe exhaustion." The doctor glanced at Jiraiya with her gaze showing nothing more or less than annoyance. She wasn't mad at Naruto.

She was mad at Jiraiya.

How could a teacher raise a student to go so far with his training that he exhausted himself, hurt himself, and just kept doing it every night, just so he could learn to perfect some stupid little exploding spiral ball? It was insanity, and she held a lower opinion of the man for it. She had nothing but compliments for Naruto's work ethic, but she would be damned before she said it was a good thing that he worked himself so hard.

"He's been what?" Jiraiya was a little surprised.

-With Naruto-

"Come on... come on... stay... stay... hah... hah."

He was exhausted, he was so exhausted that he could barely stand, but he could barely hide the excited grin on his face as he looked at the technique that he had formed. Between his hands, was a stable Rasengan that he had formed without using a Shadow Clone to form. He still needed to use two hands to form it, but he had managed to train himself to the point of not needing a clone at all. It was a huge improvement from where he had been before.

Now to test it.

"Rasengan!" Naruto slammed the technique into a boulder, and the entire rock formation shattered as a spiral ball of expanding power created a long crater behind the rock. Naruto grinned to himself when he saw the power behind his technique, showing that he had gotten one step closer to mastering the technique for real. Naruto placed his hand out, and he used his other hand to mold the spirals of chakra. "RASENGAN!" Naruto slammed another Rasengan right into the ground, and formed a large spiral crater.

Twice in a row, it wasn't just a fluke.

"Wow! That was super powerful, you go Naruto-kun!"
"We knew you could do it!"
"You're so awesome!"

'I could seriously do without the audience.' Naruto thought, but even as he thought it, he was grinning at the praise from the random girls who were watching him train. Seeing his progress with the two handed Rasengan, he looked at the burns on his hands, before nodding to himself. "Next... lets do it with one hand." Naruto reminded himself.

His work had only just begun.

He wanted to see if he could master the one handed Rasengan before his teacher woke up, to show him that this trip to another world was more than worth the cost of an arm that Jiraiya paid. His teacher had sacrificed an arm for this extended training trip, and Naruto would be damned before he allowed such a sacrifice to go in vain. He was going to show Jiraiya that not only was him losing his arm appreciated, but that he would grow so strong that the loss of an arm wouldn't matter.

Naruto formed an unstable Rasengan over one hand.

It exploded and blasted him backwards.

"Damn... that was an instant failure... okay... lets try that again, slower." Naruto watched the chakra above his hand start to form the Rasengan, but it wasn't as dense as it should be. It was more lightly colored, and it wasn't a perfect sphere. It wasn't exploding on him, but it was such a low powered Rasengan that it would hardly be called anything more than a "Friendly Sparring Rasegan" in power.

He doubted it could do more than rip somebody's clothes up.

Naruto increased the power, and it exploded on him again as it lost shape.

-The Next Morning-

'How many times am I going to take this girl home?' Naruto wondered as he took the sleeping girl on his back to her home yet again. She was the only girl who would stay and watch him training all night long, to the point that she would fall asleep by morning.

"Ah, good morning Naruto, seems my daughter stayed out late again."

"It's not big deal, dropping her off is on the way to the hospital." Naruto stated as he greeted Tsurara Shirayuki, the mother of the girl he was carrying.

"Please, do come and join us for breakfast."

"Thanks, but I've got to get to go meet Sorayuki that I would get fitted for some new clothes. She seemed upset that my clothes are starting to fall apart." Naruto's clothes weren't in great condition with how hard he was training. He was pretty good with the cold, and the village was warmer than outside of the village, but still barely above freezing. His clothes had holes in some spots, and the breeze was starting to slow him down.

"No my, I almost didn't notice your clothes were getting so ruined." Tsurara took her daughter from Naruto, and before she could offer to let Naruto borrow a kimono from her, he took off like a speeding bullet. He was out of sight within moments, showing such an amazing foot speed that she doubted any of the girls in the village could keep up with him if they tried their hardest and cheated.

-At the Hospital-

"Those clothes look good on you."

"Thanks... how is he doing?" Naruto asked. He was wearing an orange and black yukata, with a knee length bottom to it, and he had taken to keeping his shinobi sandles, which were durable enough to handle his training. An orange and black yukata with a black obi around his stomach. It seemed that stuff like "pants" weren't common among this village. He didn't mind the yukata though, he didn't wear them often, but it wasn't a style of clothes he was against.

The older woman even made the one for him in orange when she learned it was his favorite color, so he just had to wear it.

He would have preferred a jinbei though, that would at least have shorts, but he had his boxers on underneath the yukata, so everything was fine. Beggers couldn't be choosers, and his clothes were starting to get ruined.

"He was awake last night, but he's resting again now."

"Well, I need a nap now too, can't train or help people out without some rest." Naruto fell back onto the unused futon on the floor. Once he was done resting, he would jizz into a cup for the doctor to study and pay off part of the medical bills, then he would go into town and help some of the older ladies with chores they needed doing, followed by finally getting back to his training. "I did it... I was able to make a Rasengan without using a Shadow Clone... when Pervy Sage hears about that, he's going to be so proud." Naruto grinned.

He drifted off to sleep.

Chapter End!
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