Disclaimer: First Chapter
Story Start!

"Haaaaaah... that man."

Rias Gremory was a beautiful, and currently mentally exhausted, young woman as she looked at clearly what was her brother's handwriting in a letter. She was in a track suit at the moment, while her peerage had been working on training for the past 3 days, and she had been watching that training to see the results of it.

Then 3 strangers showed up.

They had a letter from her brother hiring them to be private combat tutors for them.

"Everyone, line up, it seems we have private trainers here to help us make progress!" Rias called out to her peerage, waving a gentle hand over to them to get their attention. "... You guys are good teachers right?" Rias turned and faced the 3 of them.

They were odd.

The Pink Haired woman had an overall average amount of energy, but there was a MASSIVE amount of energy stored in the mark on her forehead. Rias wasn't the best at being a sensor, but she could sense the woman was storing a decent amount of energy in her forehead at all times. She had some very great control over her power to store it away in herself like that.

The Black Haired man was rather pretty, though he was missing an arm, and he carried a sword at his side so she knew who she would want him to work with. His visible eye being red with strange marks was weird, but the fact he had a rather huge amount of energy inside of him was a good thing to note.

Both he and the pink haired one stood close together.

'... And then there is you.' Rias looked at the blond.

He glanced at her, and he looked at her peerage as they were approaching them at her command.

He was a damn monster.

'... I can't fathom the depths of his energy. With the other two, I can sense how large their reserves are... but with this guy... I can't even imagine how much he has in store... I can't even properly tell how large his raw reserves are.' Rias had never met somebody with so much energy that she couldn't even get the smallest amount of a measure of them. The funniest part was of the three people in front of her, he was the only one who seemed to be super friendly. The pink haired woman was kind, but she had a sort of... hard to approach air to her.

The strongest of the trio seemed like the most human of them, but at the same time the most inhuman.

When her peerage approached and tried to feel out the strangers, those who could sense energy were... stumped and put on alert by the blond.

"Everyone... these three are..." Rias stopped and looked at them.

Introductions were in order.

"I am Uchiha Sakura, his wife... I am a doctor by trade, but I am also a martial artist. I'm being paid to train you guys... so if any of you specialize in healing, I look forward to working with you." Sakura got the message and introduced herself. She looked around at the peerage of devils in front of her, and she gauged them up.

No threats, but at the same time, none of them came across as all that impressive. She wasn't a Sensor-ninja like Naruto, and neither was Sasuke for that matter. He could gauge a person with the Sharingan, but she didn't have that benefit. A person had to have massive reserves of energy for her to be able to sense it, and they needed to be actively using it.

"Oh... I have a Healing Sacred Gear... I look forward to training under you!" A blond haired girl stepped forward and bowed. "... I am Asia Argento!" She realized she forgot to introduce herself. Sakura smiled.

She blinked.

She looked between Asia and Naruto a few times.

'Holy crap... these two look like siblings... she's got a dorky kind of cuteness to her, and she's super friendly... also blond hair and peach skin... even their eyes are both round...' Sakura was stunned when she just looked at how much Naruto and these dorky girl looked alike. She pinched Naruto's cheek and pulled on it.

"Ow."

She then pinched Asia's cheek and pulled on it.

"Ow."

"Even your facial expressions are the same... okay Asia, I know just how to work with you. Unless there are other healers, I think you'll be my only student." Sakura clapped her hands together. She whispered her observations to herself. Naruto was rubbing his cheek, sending her a small glare for pinching him. "I will take your healing abilities to the next level. Come, come." Sakura held Asia's hand and pulled her along.

Right towards the mansion they were going to all be staying at.

Sasuke stepped forward.

"Uchiha Sasuke... and I'll take you two." Sasuke pointed a finger at two members of the group. "... Introduce yourselves, and then lets get going." Sasuke wasted not a second.

A blond haired boy stepped forward.

"Yuuto Kiba, and I specialize in swordsmanship... and I have the power to make swords. It will be a pleasure working with you." Yuuto was a handsome young man to say the least, and very polite. Sasuke looked him up and down with his Sharingan. Yuuto stepped back when he felt like Sasuke was staring right through him.

Not at him, through him.

"A pleasure to meet you sir, I am Himejima Akeno... I am all All Around magic specialist. I can skillfully use all the basic magic elements, and my favorite is lightning." Akeno was also very polite, and bowed slightly as she introduced herself. Sasuke looked her up and down too.

'Dark energy... both of these two people are twisted, and filled with immense hatred that stains their souls. Both of them are talented though, so they will be easy to teach...' Sasuke looked over at Naruto, and stared at the ground for a second, before he looked back at Akeno and Yuuto. He stared through them again, and they reminded him much of his younger self from merely a year ago. '... The boy is stained by revenge, and the girl is tainted by self-loathing and hatred... yes... these are the type of people Naruto would become friends with... and put all of his effort into saving.' Sasuke smiled for a brief moment.

He would save Naruto the trouble.

"So... what kind of training will you give them?" Rias asked Sasuke kindly.

Sasuke stopped smiling.

"Follow me, do not fall behind." Sasuke turned around and began walking away from the mansion, right into the forest. He had no words to spare for what he was going to be doing. Rias scratched the back of her head.

"Well, Issei, Koneko, I guess that leaves you two-" Rias was stopped and choked.

Naruto wrapped an arm around her neck and pulled her in.

He also grabbed Issei and Koneko and pulled them in as well.

"I guess that leaves you 3 with me then! Great, while Sakura trains your healer, and Sasuke trains those two weirdos, I'm going to train you three on how to tap into your latent potential... we're going to push you three to the edge and beyond! The name is Naruto, glad to meet you all!" Naruto let go of them after introducing himself.

There was a silence.

"Us... three... I'm sorry, but... I don't think I'm part of the training." Rias wasn't a member of the peerage.

"Nonsense. A leader has to lead, and my training will make you an even better leader. Now... oh wait... I need your names." Naruto looked at them all.

"Rias Gremory, the King of this peerage. I use magic." Rias was still a little stunned.

"Hyoudou Issei, and I have this-" Issei summoned a red gauntlet to his left arm. "... it lets me double my power every 10 seconds... it's called the Boosted Gear... and I'm going to be a Harem King one day!" Issei gave a loud and happy introduction.

Naruto kicked him in the nuts.

"Hah." The shortest person in the entire group laughed.

"Sorry, sorry... Couldn't help myself, thought it would be funny the second you mentioned a harem if I tested out your junk... and gonna be honest... it was funny right?" Naruto asked Rias. He kicked Issei in the nuts purely because he thought it would be funny to see if the guy wanting to have a harem, had the sense of urgency to protect his balls from surprise attacks. Issei was curled up on the ground.

Rias was hiding a smile behind her hand, stifling a giggle.

"Toujou Koneko, hand to hand combat... Naruto-sensei." Koneko was neutral in tone, but she had the smallest of smiles on her face as she looked down at Issei. She stepped forward and introduced herself, placed her hands together respectfully, and bowed to him. 'His aura is absolutely massive... and I can't even sense how powerful he really is... it's weird... but I feel so comfortable around him. It's like basking in the sun... I got the best teacher.' Koneko couldn't help but think.

Sasuke kind of gave her bad vibes, and she wasn't interested in healing.

This guy was clearly the strongest.

"Asshole... why didn't you... hit her."

"She's cute, it wouldn't be funny to hit her... anyway, I'm going to beat the hell out of all of you..."

"Eh?" Rias, Issei, and Koneko all asked in unison when Naruto pounded his fist into his palm.

"That's right! This is how it's going to go... for the next 3 days, you're not allowed to Eat, Sleep, or Rest at all while I beat the living fuck out of you, and you try and fight me back!" Naruto poked all three of them in the forehead.

They all felt a small amount of energy enter their bodies.

"... 3... days no food?" Issei stepped back in horror.

"Don't worry, I'm sharing some of my chakra with you guys. You will still feel hungry, but I'm going to convert my chakra into calories for you. I'm also going to prevent you from dying from exhaustion, and heal any wounds that would prevent you from standing up to fight." Naruto was going to push them to the brink of death and keep them there until they pulled out inner strength. He himself could go 3 days of nonstop fighting without rest easily, so that was how long he was going to spar with them.

"Three Days." Koneko whispered to herself.

"That's right... three days is a little much, don't you think... even if you could in theory turn energy into calories... we would still be training so much our bodies would become malnourished." Rias was ALL for harsh and unforgiving training, but it needed to be something they could survive.

Naruto smiled.

Rias blinked as her chest started to expand, and her tracksuit unzipped itself as her boobs grew bigger and bigger. Issei's jaw dropped as she gained an entire, noticeable cup size increase, and even Koneko stared at her.

"Don't worry, I can turn my chakra into fat to restore your fat reserves." Naruto sent them a thumbs up.

"What the FUCK Naruto! You can do that?"

Sakura, who had been walking towards the mansion, rushed right back and stared at Rias' boobs. "... You can do that!?" Sakura grabbed him and shook him back and forth.

"Yeah, I did it for Choji and the other Akamichi clan members during the war... remember... when I turned my chakra into fat for them!?"Naruto shouted out to Sakura to get her to stop shaking him. He was only using this ability because Rias commented that they would get malnourished, and he wanted to show her that even if they didn't eat anything, even if they got hungry, that he could just prevent their body from starving itself by giving them more fat to eat.

"If you can do this with your chakra, why the hell do you eat so much... just survive without food for a week so we can save money!" Sakura began shaking him up and down. "... Also... increase my bust size by a cup size please!" Sakura backed off and placed her hands together.

"I refuse to not eat, eating food is fun. Even if I can survive without food, I refuse." Naruto deadpanned, before he sent her a thumbs up.

He would gladly give her an increased bust size.

She sent him a thumbs up back.

"... You better."

"... I will." Naruto promised her. "Also, don't worry, as you train, your boobs will go back to their normal size." Naruto stated as Sakura began to walk back to where she left Asia waiting. She stared him down the entire time. "... Sheesh... did she forget that I only gave Choji his fat back so that he could use his techniques... Why would I just go around just giving girls big tits for no reason..." Naruto muttered to himself.

Issei was bowing at his feet.

"Boobs-Sensei, I bow at your mighty feet... I am willing to be molded by these glorious hands." Issei reached up and got up to his knees and touch Naruto's hands, and caress his face with them. He looked at Naruto with love and adoration, while Rias sighed and managed to force her tracksuit to zip back up around her enlarged breasts. "These hands, which have the ability to grant fat and calories to a woman's beautiful chest... I am willing... I am wanting and wishing to have these hands mold me-"

Issei puked when Naruto punched him dead center in the stomach.

"Hah." Koneko gave a short laugh again.

Koneko puked when Naruto punched her dead center in the stomach.

"Ouch." Rias winced in pain when she saw two members of her peerage were puking on the ground.

Rias puked when Naruto punched her dead center in the stomach.

"Training begins now." Naruto was excited to begin as he cracked his knuckles.

He took a step back.

There was a lot of puke around his feet that he didn't want to step in right now.

Chapter End!
Please Leave Me Lots of Nice Long Reviews, But No Flames Please!

Naruto, in Chapter 616, gave his chakra to Choji and restored his fat... and Naruto used his chakra to restore Shikamaru's fat AND nutrients after the Shinju stole his chakra, fat, and water from him. This shows Naruto can grant fat and water to people who aren't Akimichi.