A/N: This is a story I came up with a few days ago, and I've been working on it since then. I thought it was pretty interesting, so I'm gonna share it with you all. Anyways, enough blabbering. Time to get into the story.

Warning: This will contain taboo topics. Don't like, don't read.

Note: Minato survived the Kyuubi attack. He died after his daughter was born a two years later in battle.

Chapter 1: Beginning

Prologue:

Naruto Uzumaki, the Savior of the World. That was his new title. He was the most popular person in the world, at this point. After defeating Kaguya and Madara, and bringing Sasuke back to the Village, he decided to focus on his family. At age seventeen, he never really got into dating although he had a crush on Sakura for awhile, so his love life was extremely complicated. His younger sister, Naruko Uzumaki, had just turned fifteen after the war ended. In fact, Naruto and Naruko shared one day between their birthdays, Naruto being the Tenth of October while Naruko was the Eleventh of October. Kushina had just turned 34, after getting pregnant with Naruto at 17 and Naruko at 19. A month after the war, Naruto decided to help his younger sister with her training, since he never really had the opportunity to do so.

xxx

"Naruko!" Naruto called up to the younger Uzumaki. The fifteen year old girl flew down the stairs, jumping into her older brother's arms. She looked up at him and grinned.

"Nii-san!" Naruko nuzzled her face into Naruto's black jacket. The older brother laughed, hugging his sister. It had been the first time Naruko had seen her older brother due to a mission he went on with Sakura and Sasuke. Kushina smiled at the two blonde's from the dining room, waving them over to the table. Naruko broke the hug, running over to the table. Naruto watched his younger sister run to the table. If he were to describe her, she was hard working, always striving to get better. She was humble, and she was kind to everyone. The people of Konohagakure treated her respectfully, unlike how they originally treated Naruto. She did not possess a speech impediment that both Kushina and Naruto had. She seemed to have taken after her father more than her mother. To describe her physical features, he would say that she had long sun-kissed hair that reached down to her lower back. Her eyes were as blue as the sky above. She had cute dimples whenever she smiled. Unlike Naruto, she did not possess the same whiskers-like markings on each of her cheeks like he did. This is likely because Kushina did not have Kurama sealed in her when she was pregnant with Naruko. Her waists were slim, her thighs were thick, her butt was round. Her body figure was perfect. Her breasts were e-cups, which he knew from constantly having to do the laundry. She wore a black sleeved crop-top that wrapped around her breasts and held tightly to her skin. It had an orange zipper and buttons. Her midsection was exposed, showing her bellybutton and waists. She wore black yoga pants with her wrapped around her waist. Around her right knee was a shuriken holster, which was designed to resemble her father's Hokage cloak, white all over with red flames from the bottom. Her tool-bag rested on her left hip, easy access to both the tool-bag and the shuriken holster considering she was right handed. Naruto knew their mother never really enjoyed the outfit she wore, as she didn't want her daughter to look like she's 'been around', as Kushina put it. She eventually learned to accept the outfit. A snapping noise brought Naruto from his trance.

"Naruto! Hurry before the food gets cold!" Kushina said, waving him over. Naruto smiled at his mom and walked over to the table. Naruto pulled the chair out, taking a seat. He scooted the chair in, adjusting it so he could eat properly.

"Thank you, kaa-san!" The siblings said in unison. In front of Naruto, a stack of fluffy brown pancakes rested on a white plate. Naruto grabbed the syrup and began pouring the sticky liquid onto the doughy breakfast. Once they were covered with the syrup, he began cutting them with a knife in one hand and picking them up with a pair of chopsticks in the other. He looked up at his younger sister, who hadn't taken a bite of the food. She seemed too antsy to eat, bouncing up and down in her chair.

"Naruko, I'll start training you only after breakfast." Naruto told her. He knew she was excited. He had promised her months ago that he would train her the moment he had an opportunity. He never exactly had an opportunity, however, so she mainly learned fuinjutsu with Kushina. She wanted to learn everything with her older brother, so she could work to surpass him. Naruto knew this, but couldn't do anything to help her since he had been so busy. But now that his former Jonin leader, Kakashi Hatake, was now the Sixth Hokage, he was able to request a two month vacation to train his younger sister. Kakashi even allowed him to form a duo squad with Naruko once the vacation ended in order to give them all opportunities to train.

"I know, but I'm just so excited to start learning with you, nii-san." Naruko said. "What are we going to learn first?" Naruto thought for a moment, stopping his chewing in order to think.

"What have you learned already without me?" Naruto asked. Naruko thought for a moment.

"Hmm... I learned a lot of fuinjutsu with kaa-san, and I know the Shadow Clone Jutsu. I can't form as many as you can, nii-san, but my limit is about twenty clones. Umm... I know how to control my chakra to run up trees and walls, but I haven't been able to properly control it yet to walk on water." Naruto was impressed. The only other person who he knew that could form that many clones was Konohamaru. He took in the details of her training so far, and nodded.

"Okay. We'll learn how to Walk on Water first, 'ttebayo." Naruto told her. Naruko squealed, quickly taking bites of food to speed up time. Kushina giggled, and looked over at her first born.

"You be careful. That new arm of yours isn't fully healed yet." Kushina warned him. Naruto nodded. Tsunade had given him a replacement arm after he lost his in the fight with Sasuke, one made entirely from Hashirama's cells. Naruto was still getting used to the arm, and because of that, he was instructed not to push himself for awhile. That was another reason Kakashi granted him a two month vacation.

"I will, kaa-san." Naruto said. He finished his breakfast and stood, walking to the sink and placing the dish into the dirty pile. Naruko did the same and began jumping on Naruto.

"Lets go, nii-san!" Naruko pleaded. She wrapped her arms around his left arm, pulling him into her chest. He felt a tad bit uncomfortable, considering his little sister was squeezing her arms into her large breasts. Had it been any other female, he would've been fine with it. But it being his little sister made it a bit strange. Naruto placed his bandaged hand on the shorter girl's head, and ruffled up her hair. She squealed, pushing it off of her head. Her hair was now frizzy, sticking straight up. She playfully punched him in the side. "Nii-san! You messed up my hair!" Naruko complained. Naruto laughed.

"You're going to get wet during our training so it really doesn't matter, y'know?" Naruto told her. Naruko thought about this for a moment and shrugged.

"I guess. C'mon! You're wasting time! Let's go already!" Naruko basically dragged her brother out of the house. Kushina waved at her two children as they rushed out the door. She giggled, continuing her breakfast while reading the morning paper.

"Okay, Naruko. You can let my hand go." Naruto said with a chuckle. His younger sister let his hand go, bouncing up and down. She smiled at her taller brother.

"Where are we going, nii-san?" Naruko asked. Naruto thought for a moment, before waving her over. He began to run down the roads, leading them straight to the forest. Naruko's face filled with excitement and curiosity. She wanted to quickly get started on the training, but was also wondering where he would take her. The Jinchuriki led her to a lake about ten minutes into the woods, one that had a deep end and a shallow end. He could use this to help Naruko get the basics, then transition into the deeper section where he could create waves and show her how to stand in moving water. Naruto slid in the dirt to a stop as he revealed the massive lake to her. Her eyes twinkled like stars, her face brightening with excitement.

"Okay. You packed the bathing suits, right?" Naruto asked. Naruko took the black bag from her shoulder, opening it to reveal both her and Naruto's bathing suits. She threw the shorts at her brother, who swiftly grabbed them out of the air. They were orange and had green frog imprints all over. He smiled at his younger sister. "I'm going behind a bush and change." Naruko nodded as she began unbuttoning the crop-top she wore, exposing her bra-covered breasts to the air. Naruto quickly his behind a tree, throwing his new black jacket off and his orange pants. He folded them and quickly switched his underwear with the swim trunks, pulling them on and tying the strings. Naruto picked up his clothes and headed back to the lake. In front of him, his fifteen year old sister stood. She wore a pink bikini. The top that covered her large breasts had a ring on the back, connecting both sides in order to hold it in place. Her bottoms, however, was a g-string. The small coverage it gave her only hid away her privates while the string in the back went through her butt, hidden away by the plump cheeks she had. Naruto's face blushed a bit as he saw her.

Did she really need to wear such a revealing bikini? Kami, I'm her older brother. She doesn't need to impress me, Naruto thought.

Naruko tied her long blonde hair into duel ponytails, something she usually did when they went swimming or she went on missions. Her golden hair swayed around as she turned to face her older brother. She gave him a toothy smile and began walk towards the lake. Naruto sighed, a smile forming on his lips as he approached the lake with her. He stood beside her, and looked over at her. She was watching his movements.

"Okay. In order to do this, you have to charge your chakra at your feet, similar to how you did when you walk up walls and trees." Naruto explained. He clapped his hands together, charging his chakra at his feet. Naruko copied his movements, doing the same. He began to walk towards the water, taking a step onto the lake. His foot hovered on the liquid, as he began to take steps. Naruko placed her chakra-enhanced foot on the liquid, instantly sticking to the water. She looked up at Naruto and grinned as she began to take her second step. She lost balance and fell into the water, drenching herself. Naruto chuckled, remembering the first time he walked across the water with Jiraiya. He had a similar problem that she does now, and being her older brother, he wanted to help her fix this issue.

"Damn! It's a lot like walking up the tree, but when the water moves I have to change the amount of chakra I use on my feet." Naruko said. She quickly climbed out of the water, and began the exercise once again. She placed her right foot on the water, sticking to it. She moved her left foot to the water, sticking to the liquid. Her stance did not last long as she fell right back into the water. He began to grow frustrated, and Naruto saw it in her face. He smiled, walking towards her.

"If you want to do this, you have to be emitting a constant stream of chakra from the bottom of their feet and using the repellent force to walk across the water's surface, 'ttebayo." Naruto explained. "The reason walking on water is more difficult to master than walking up walls and trees is because the amount of chakra that needs to be emitted changes constantly. It's not a solid surface, so there's nothing for you to necessarily stick to." He told her. She nodded, as her older brother walked behind her. He placed his hands on her hips in order to hold her so she wouldn't fall in. Her cheeks blushed, turning a faint red at his soft touch. "Here, I'll help you keep balance while you figure out how to adjust the amount of chakra." Naruko nodded, taking a step onto the water. Naruto had a hard time concentrating on the training. He already was feeling flustered before when he saw her in her bikini. But now, it's a different story. He was bending over, hovering over her shoulder with his hands on her hips. He was practically staring down at the cleavage the bikini top revealed. Naruto tried his hardest not to look, but his mind wouldn't budge. His eyes refused to leave sight of the beautiful melons of his younger sister. Naruko, on the other hand, felt extremely awkward with her older brother's hands on her hips. It brought a feeling she never had before, one she assumed she wasn't supposed to feel with her sibling. After a few moments of them walking, they both realized they were floating over the center of the lake. Naruko's squeal of excitement broke Naruto's gaze. He blinked, finally looking away from his sisters breasts and realizing that they were in the center of the lake.

"Nii-san! I did it!" Naruko cheered. Naruto smiled, releasing her hips. She stood still on the water, looking ahead. Naruto walked about six feet in front of her, and held out his hand.

"Okay, now try to walk over to me without me holding on to you dattebayo." Naruto told her. She nodded, taking a step towards him. She wobbled a bit, regaining her footing and taking a second step. A third step, and Naruto's arm was reachable. Naruko reached out and grabbed his arm, holding on tight. She squealed and grinned at her older brother, when suddenly her feet gave out. Her excitement must've caused her to forget to keep her footing because she plummeted into the lake, along with Naruto. They looked at each other under the water, quickly swimming up to the surface. They floated in the water as their heads were exposed to the sky. Naruko began to laugh, pointing at her brother.

"You fell in too!" Naruko giggled, causing Naruto to narrow his eyes at her.

"Hey! You pulled me in with you!" Naruto said. "Besides, you're the one who fell in first!" He poked her forehead, causing her her face to scrunch up. She stuck her tongue out at him and splashed some water on him.

"You're the 'master' at this and you got pulled in by some newbie!" She teased. Naruto splashed water back at her. She narrowed her eyes at the older Uzumaki and grabbed him, pulling him underwater. She wrestled with him, gripping him by the waist and dragging him down. Naruto wrapped his arms around her and pulled her off of him, swimming up to the surface. She began punching him on the head.

"Say sorry, and I'll put you down!" Naruto said. She grunted at him, continuing to hit the older boy on the head.

"I'll never say sorry! Never!" She squealed. Naruto shrugged his shoulders, a smirk growing on his face.

"Your loss!" He threw her a few feet away, causing her to scream as she fell into the water. Naruto began laughing, seeing her head poke out the water after a few seconds. She gave him a death stare.

"That's it!" She yelled. Naruto's face filled with fear as she began swimming towards him. He quickly climbed out of the water, running across the surface as he looked behind him. Naruko was tailing him with her incredible swimming speed. Naruto finally reached land when he felt a pair of arms grab around his midsection and throw him to the floor. Naruko tackled him into the dirt, rolling him onto his back. She sat on his stomach and pinned his arms down behind his head. Naruto laughed, opening his eyes to see his younger sister sitting topless on his stomach. His eyes widened and his face turned a dark red. She looked at him confused.

"N-Naruko... Your..." Naruto began saying when Naruko looked down. Her breasts were fully exposed, her nipples pointing down straight at her brother's face. Naruko screamed, quickly releasing his arms and covered her chest to prevent him from seeing them again.

"My top!" She looked backwards into the water, seeing the pink bikini top floating in the water. She looked down at her brother, who's eyes were shut tight and his face was as red as a tomato. Naruko quickly climbed off his stomach, still covering her nipples so he wouldn't be able to see them. Naruto opened his eyes, looking straight up at the sky. "Naruto, can you get my top?" She asked. He quickly stood up, dusting the dirt off of his chest and back and looked at her. She looked completely embarrassed and her cheeks were pink. He nodded and began walking to the middle of the lake. He bent over and picked up the pink top and headed back. He hung it over his sister's shoulder and sat down by the edge of the water, watching the small fish that lived in the pond swim around. After a few moments, Naruko reluctantly approached him and sat next to him. She hugged her knees, resting her chin on top of them.

"It's not that embarrassing, y'know." Naruto finally said, breaking the minute long awkward silence. "I got my 'equipment' made fun of right in front of the girl I liked, 'ttebayo. That was way more embarrassing than you losing your top, in my opinion." Naruto said with a laugh. His long spiky blonde hair hung over his forehead. He ran his fingers through it, causing Naruko to look back at him. Her eyes widened a bit as she saw the scars on his chest and sides. His chest was muscular along with his arms; he had six-pack abs, which surprised Naruko. She looked at his fling the water out of his hair.

"Did... Did you like them...?" Naruko finally asked him. Naruto looked at her and raised an eyebrow.

"That's a weird question to ask me." He said with a chuckled. She quickly looked away, her face turning red once more.

"You're right. That was a stupid question." She said. She covered her face with her hands, looking down at the dirt. Naruto's eyes widened and he chuckled.

"No! I mean... Yeah, you have very nice boobs, Naruko. But it's kinda weird for me to say that, y'know?" Naruto replied. She moved her hands away from her face, looking at her older brother.

"Really?" She asked. He nodded, leaning back. He moved his hand behind them to use as a support and hold him up while he stared out at the sky. The sky was beautiful, white fluffy clouds floating around high above. "...Thanks, Naruto..." She said. She gave him a cute smile, her dimples showing off. He smiled back at her. She stood up and headed towards the bag, pulling out a towel. She moved next to him and laid the towel out, lying down onto it. Naruko turned her head to look at him.

"Hey, Naruko..." He mumbled. She tilted her head, looking up at her brother.

"Yeah?" She replied. He looked at her and gave her a smile.

"Wanna camp out here?" Naruto asked. She grinned, nodding enthusiastically.

"Yeah! I haven't went camping in awhile! That would be fun!" She said. She swiftly sat up and nodded. Naruto laughed and got up.

"Okay. I'll head back to the house and pick up some of our camping supplies dattebayo." Naruto said. He walked over to his pile of clothes and pulled his open-toed sandals on before running back into the forest. Naruko stared out over the lake, watching the sun's reflection teeter around on the water. She smiled.

Nii-san saw my boobs... It was really embarrassing, but afterwards he didn't make it seem so bad. He really helped me calm down and relax. He even said he thought they were nice. Now he's going to camp with me!

Naruto ran through the woods, racing back to the house as fast as possible. He finally got to the roads and lept onto a rooftop, running atop the houses to avoid being spotted, considering he was practically nude. He finally reached his home and jumped down, quickly entering through the front door. Naruto walked to the closet, searching through the various things stuffed in there. Kushina spotted him kneeling by the closet and tilted her head.

"Naruto? What are you doing?" She asked. "You guys are already done training?" Naruto looked back at the redhead and shook his head.

"Nah. Naruko wanted to camp by the lake tonight and come back tomorrow. I just came to get the tent, blankets, and an extra set of clothes." Naruto said. Kushina nodded, laughing a bit.

"Okay. You kids be safe and make sure you eat dinner." She warned him. Naruto nodded, giving her a salute. He found the tent supplies buried deep into the closet. He formed a hand seal, spawning a Shadow Clone next to him. He handed him the bag of tent supplies while he ran upstairs to get the blankets. He formed another Shadow Clone to carry these, and began to dig through the various drawers in his and Naruko's room to find clothes. Naruto finally picked out some sleep ware for the both of them and headed out. As he was leaving the house, an idea popped into his head.

"I should get the fishing rod." He whispered to himself. He formed another Shadow Clone and commanded it to fetch the rod. It quickly ran to the closet and pulled it out. The four Naruto's all left the house. "Bye Kaa-san!" He yelled out as he shut the door. They jumped to the rooftops, racing back to the forest. With each rooftop jump they inched closer to the trees, and finally made it. They jumped down into the wooded area, running through. The large blue lake slowly came into sight, and the four of them reached the beachy area. Naruko turned around and smiled at the four Naruto's all in their swimsuits. She watched as the four clones all began to set up the tent, pitching the pyramid up with long black rods. They buried them into the dirt, and before long the tent was set. Naruto threw the blankets into the tent and quickly commanded the clones to scourge the area to find some firewood. Naruko watched Naruto lead the clones, smiling at her older brother.

Nii-san is so cool... I wanna be like him some day, Naruko thought.

Naruto began walking down towards the lake, standing over his sister. He reached out his hand, which she took. She swiftly stood up, looking up at his whiskered cheeks as he grinned at her.

"Let's train some more, 'ttebayo!" He said. Naruko squealed as they ran back onto the water.

xxx

After a few hours, Naruko finally figured out the idea walking on water. She was able to walk across, and even run. Naruto taught her how to climb out the water the same way you get out of a pool. After all that training, their stomachs began to growl. Naruto began fishing, waiting at the surface of the water for a bite. He finally caught a decent sized fish the two could eat together, and headed back. The clones found enough driftwood for a few campfires and laid out three sets of wooden sticks and branches.

"Now, how am I going to light this fire." Naruto asked himself. He began thinking of all the jutsu he knew, none of which could create fire. Naruko perked up and began to bounce around him.

"Oh! Oh! Let me do this!" She said. She formed some hand seals, finishing on 'tiger'. The older Uzumaki's eyes widened as he recognized the seals. "Fire Release: Fireball Jutsu." Naruko inhaled, exhaling a small fireball onto the wood pile. Naruto smiled at his younger sister.

"Good thinking, Naruko! Since when did you learn that?" Naruto asked. The blode girl shrugged.

"I was reading up on some of the Uchiha Clan's jutsu they used before they all... you know." She said. Naruto nodded.

"Well, I'm impressed you learned that. Good work, Naruko." He commented. She blushed a bit, smiling at the ground.

Naruto began cooking the large blue fish he caught, all while Naruko watched from beside him. After about thirty minutes, the fish had completely cooked and they ate dinner. The orange sunset had left a small amount of light remaining, as Naruto sighed.

"Well, I guess we better change into our pajamas." He said. He went over to the bag of clothes he brought, handing the outfit to his sister and taking his outfit for himself. Naruko crawled into the tent to change, while Naruto changed right outside the tent. He brought a simple pair of red shorts and a white shirt with the Uzumaki crest on the back. For Naruko, he didn't really know what to grab so he had grabbed whatever he found. She unzipped the tent, revealing herself in a white crop-top shirt and pink cotton leggings. The sun had set, and they crawled into the tent together. Naruto laid next to the younger blonde, sleeping beneath the same blankets. He stared up at the roof of the tent before turning his head to speak to the girl.

"Sorry I didn't find a bigger tent. This is the only one we have." He said. Naruko shrugged.

"I don't mind. It's nice and warm in here, anyways." She said in response. She began to cuddle nexto to her brother, who smile at her.

"Goodnight, Naruko." He whispered. She looked up at him with her aqua eyes and smiled.

"Goodnight, nii-san." She whispered back, snuggling into his side. After a few moments, they drifted off to sleep.

xxx

The next morning, Naruko found herself waking up first. Her eyes opened, staring at her brother's face. She quickly analyzed how she slept, and felt really comfortable. Her leg was wrapped around Naruto's waist, her hand rested on his chest while her breasts pushed into his arm. Her head rested on his shoulder. Naruto had even wrapped his arm around her waist, pulling her into him. She silently giggled, realizing Naruto wanted to cuddle with her in the middle of the night. Naruko was about to get up, she quickly decided not to, and stayed hugging onto her brother. She adjusted her leg slightly, feeling something hard rub against the bottom of her thigh. She lifted her leg, seeing a mountain sticking straight up from under the blanket. Her eyes widened, quickly realizing exactly what this was.

Nii-san got hard because of me, Naruko thought. Her face turned a bit red and she giggled. Naruko climbed off her brother and headed outside, slipping out of her pajamas and into her bikini for another day of training.

xxx

Hope you enjoyed! This might be a new story, or it could be a one-shot. It all depends on how I feel and if you want me to continue. Anyways, thanks for reading!