Together in time

Chapter 1: Blame Kamui

Story synopsis: In amidst the tension of Kakashi's and Obito's duel, both rely on their Kamui to claim victory. Kamui is a powerful mangekyou, and when used lightly the results can be life-changing. Literally. It's a Kekkei Genkai that allows transportation through space-time, so why not actual time? Neither Kakashi nor Obito was at all prepared for what was install for them. And it doesn't help that neither knows that the other is from the future. (Yet another time travel Naruto fanfic! They are much too common, but are also amazing so why not? Probably an eventual KakaObi at some point maybe)

An eye sluggishly opened in response to the dim light that beckoned it to do so. Or rather, eyes opened? Grey hair shifted slightly as a young Hatake lazily pushed himself up from his bed, attempting to recall what had happened, or where he was. Kakashi felt a wave of nausea rise in his stomach as he moved into a sitting position. He quickly brought a hand to his mouth and the other to his stomach. He felt sick. Actually, that was an understatement. He felt like pure agony manifested itself into a living being.

"Why do I-" He started, his vision blurring at the pain in his stomach. Bare minutes passed before the grey-haired boy felt his nausea rise and forcefully shoved his bedsheets off him before making a beeline to the bathroom. His legs felt asleep and with every step he could feel the sensation of pins and needles pricking away at his legs and feet. He thought he'd known his apartment like the back of his hand, but his claim appeared to be wrong as he'd sped right into the wall where he was sure his bathroom door was. "What the hell..?" He barely got out before it'd been too late. Nausea was upon him and he'd only had time to reach to an empty bowl on what he assumed was his apartment table before his stomach emptied itself into the bowl.

He coughed up his nausea for what felt like hours but was realistically only a few minutes before fumbling onto the ground. He felt like total crap, that was for sure. Kakashi found himself on his arms and knees, breathing deeply as he tried to regain his composure. What the hell was going on? Why did he feel like such crap? The boy sluggishly raised his head as he recollected his thoughts of what had previously happened. That masked man... He'd turned out to be Obito. And they fought in that other dimension. That was the bare minimum of what Kakashi could remember, but it was enough for him to know that he shouldn't be in his apartment while there was a war going on.

He took a deep breath, exhaled, and pulled himself to his feet with the help of the wall. The bowl was left abandoned on the ground for now, while Kakashi balanced himself on the wall to stay upright. His head was spinning and he felt another wave of nausea coming. Nothing was right. Why was he in his apartment? And why was everything... bigger? Perhaps it was only his vision screwing with his mind. He could barely see ahead of himself after all.

"Breathe... J-Just breathe..." He said to himself as if it were a mantra. After a few minutes, Kakashi found the spinning world around him to cease spinning, and although his stomach wanted to heave onto the floor, the young Hatake found it in himself to ignore his nausea. It was when his vision finally cleared that he truly noticed that something was off. After surveying his environment, he came to realise that he was in his old apartment. But... How was that possible? It shouldn't be.

Kakashi found himself dragging himself across the wall and towards his bed in hopes of calming down. Once seated, the Hatake placed a hand on his head and only now realised how heated his features were. He had a fever. Why? Slowly, he opened the top draw to the bedside table and pulled out a hand mirror. How he'd remembered that he used to own such a thing even he didn't know. In an attempt to inspect how much his fever had affected his appearance, Kakashi was far more than surprised to see the body of his 11-year-old self staring back at him.

"What th-" He said in a panic, but barely finished as his nausea decided then to empty itself onto his apartment flooring. Just great... After taking a few minutes to regain his breathing and calmness, Kakashi found himself staring at himself in the mirror once more. His features look sleep-deprived, very sickly, with nausea still present on his mouth. Gross. Something that the grey-haired boy hadn't yet noticed, was that both of his eyes were found. His scar across his left eye that he'd grown so accustomed too, along with its Sharingan was absent. His hair rested in between his eyes and down the sides of his face as it used to, and his shocked expression and slouched position didn't at all suit his young self which he remembered to be so stiff-necked and uptight.

Kakashi sighed. He closed his eyes and relished in the darkness it brought. He didn't want to look around right now. It only confused him. He found himself listening to his surroundings which helped calm the boy somewhat. The gentle wind, the distant voices, and even the leaves rustling nearby. Cracking his eyes opened once more, Kakashi took in his apartment before his gaze settling on his knees, still ridden in pin and needles. His hands shook as they gripped his knees nervously and he felt sweat drip from his features. What was happening? Was this... The Infinite Tsukuyomi? Had Obito won? Did they lose? Kakashi unwillingly shook his head. That couldn't be it. If it were then he would surely have stayed an adult. But this... He was a kid. There's no way that this was a Genjutsu, but Kakashi found himself attempting to release it in case it was.

"Nothing..." He muttered to himself when the world didn't release at his attempt. Could it be that he was dreaming? With a small glance to the pile of nausea on the floor, Kakashi decided against it. It felt too real. The pain in his stomach and head was really there. He wasn't dreaming. But if it wasn't a Genjutsu, and if it wasn't a dream, then where was he? He took a deep breath for what felt like the 10th time in the past few minutes and stood up as his stomach seemed to settle for once. He needed answers... But he needed to clean himself up before that. So, with a hand pressed to his burning head, Kakashi managed his way into where his bathroom was and cleaned his face and body in hopes of ridding that stench of nausea from him. The shower he had to admit was refreshing, but the steam hadn't helped his fever at all.

After properly cleaning himself, the young Hatake made his way to where he remembered his clothes to be. The nearly cringed seeing his old outfits from his childhood. And despite being unsure whether anything that was happening was a dream, he got himself dressed in his usual attire, making sure his mask was on correctly as he sighed at the pile of nausea he'd left on the ground. He'd have to clean it up for sure. The boy went to do so, but he was stopped from such an action when he heard footsteps nearing his front door. There was someone there. There was a knock at the door and panic flooded Kakashi's mind, his fever picking itself up and raging like heat waves.

"Kakashi? Are you there?" The voice was familiar Kakashi noticed, and he unconsciously recognised it as his Sensei. But... That wasn't possible. Minato-Sensei had long since died... But one look at his younger hand told him otherwise. Kakashi felt the world spin slightly, which was never good he concluded, before unlocking the door and opening it without realising just what he was trying to do. The Hatake genius was met by spiky blonde locks and an all too familiar smile. It really was Minato-Sensei standing in front of him. Plain as day. B-But how? Kakashi's tired appearance was the first thing his sensei noticed. The second thing he noticed was how his tired features immediately shifted to pure shock at the sight of him. "Ah, Good Afternoon Kakashi..." He started, but then truly noticed how unwell the boy looked. "Are you feeling alright?"

Kakashi cringed at the worry so plainly seen on his sensei's face. No doubt it was for him and his painfully heated fever. He felt that he'd drop dead at any moment. but couldn't it in himself to hide his sickness.

"I'm fine..." He lied, being filled with too many mixed emotions to give a proper response. He could see how his answer didn't satisfy the blonde at all.

"Are you sure? You didn't come to training which is extremely odd for you. Obito wasn't there either so Rin went to check in with him. But I'm sure he's fine. I'm more worried about you since you take training very seriously I thought." Minato scratched his cheek sheepishly at the explanation and Kakashi found that he'd been given far too much information in one sentence. Obito? Rin? They were... Alive? Or rather Rin was since Obito was only assumed dead. But that shouldn't be possible either way. Thinking about it made his head hurt and he pushed his hand harder onto his burning features trying to suppress them. A small wince was all it took for Minato to show much more worry.

"I-I'm ok Lord F- ... Sensei..." Kakashi cursed under his breath at how he'd nearly addressed him. Kakashi visibly took a breath then noticed that his Sensei was blurry in his vision. He wasn't actually sure why. Bringing his hand lower to his left eye, he felt how much more it hurt compared to his head. The action had only caused Minato to worry more, reaching out a hand to help.

"Are you sure you're ok? You really don't look well Kakashi..." The grey-haired boy truly then was reminded how much of a mother hen Minato was, but panic washed over him when the blonde's hand touched its head. Minato nearly flinched back at how much his student's face was burning. He had a horrible fever. "Kakashi! You're burning up! We have to-" But he couldn't finish. Kakashi didn't allow him to. The last thing he needed was someone around him. He barely could even understand the situation, to begin with.

"Really Sensei I'm ok. Please leave me alone." And the boy then shut the door sluggishly, locking it to ensure his sensei wouldn't bother him. Minato was absolutely stunned by his student's actions. Surely Kakashi didn't have that much pride? Did he really need to shut him out like that? The Jounin wanted to knock on the door once more to ask what was wrong but found that he would be invading Kakashi's privacy... Giving a sigh, Minato brought his hand back from the door and walked down the stairs from the apartment door. What was wrong with Kakashi? His fever was no ordinary one he knew that much... Perhaps he should let Kushina know? She could prepare him a soup of sorts to help him feel better... But the real question was... What brought this illness upon the kid?

As Minato walked away with thoughts bubbling in his mind, Kakashi found himself slowly sliding down his door and to the floor. Thankfully he didn't feel any nausea, but the encounter with his very much dead sensei who shouldn't be alive was too much for him to absorb... Kakashi brought his knees towards himself and rested his head on them. He could feel his head burning up... It hurt. It really hurt... His breathing was unstable, and he felt like he was panicking. This wasn't a dream. Not at all. This was real. His sensei had really been standing right in front of him, showing his concern. How did this happen? How did this happen? The young Hatake found himself muttering those words to himself before his vision went blurry, and darkness slowed in. His mind was so tired... So before he could really notice at all, he'd lost consciousness.

It had been the fourth time Obito had made a sprint to the bathroom. His nausea hated him, and he hated it just as much in return. Nothing was right. Everything was wrong. He heaved in the toilet as his previous experienced played through his mind. He had woken up in his old bedroom in the Uchiha compound. How the hell did he wind up back here? He was so close! So close to reaching his goal! All he'd had to do was kill those last few pests. Then he'd have made a better world for sure... If that was the case... Then why the hell was he back in Konoha!?

It took the brunette a moment to regain himself from his most recent nausea. It was a side effect to whatever had happened to him surely. Thinking back, Obito could remember his fight with Kakashi. It was barely fumbling around in his mind and he washed his mouth out, but it was there. They had both used Kamui to a horrible degree. Both had surely been pushed past their limits, and... Something happened. He wasn't sure what, but it pissed him off nonetheless. Obito dried his face and took a look at himself in the bathroom mirror. He was his old self. 13 years old surely, maybe due to turn 13 in a few months, but he could be any older than that. Why the hell did this happen to him!? He wanted to throw up at the thought of being in his innocent child body. In fact, he had thrown up once he'd accepted that what was happening was real.

"This is bull!" He shouted in a fit of rage. He was forced to be back in this sorry excuse for an Uchiha body, He was weak for sure, and without the Rinnegan how the hell could he accomplish anything!? He'd been living this pure nightmare for around 5 hours. Having woken up at the crack of dawn apparently, Obito surveyed his surroundings and was in utter belief at first. Which lead to dread, and he'd broken down momentarily before being filled with rage. This just couldn't happen! Not at all! The Uchiha stormed out of the bathroom, ignoring his feverish condition or his nauseated stomach. He needs to get out of Konoha. He needed to find Madara and get the hell out of here. This world wasn't at all what he desired. Everything he had that he'd cared for... Rin... She wouldn't last here. He needed her. He needs the Infinite Tsukuyomi. This world wouldn't do at all.

This world was no doubt real. It wasn't a dream he knew that much. Something must have happened during his battle with Kakashi. But none of it mattered. Even if he had to do everything again he would. He would stop at nothing to create the perfect world full of peace. Never would anyone experience pain again. Never again. Obito strode towards the front door, not noticing the footsteps on the other side of the door, before swinging it open mid curse. However, the Uchiha was met with a face he'd sort after for much too long.

"Rin.." He mumbled under his breath. Currently facing him, was the girl he'd been dedicating his entire life to. Everything he'd been doing was for... her. And yet, there she was. Standing across from him, hand mid knock with slight shock on her face as if she hadn't expected the brunette to open the door so furiously.

"O-Obito? Hi. Uh, are you ok?" She questioned pulling her hand back as she saw a scowl on the Uchiha's face, It didn't seem to light up at the sight of her surprisingly... The lighter brunette wondered what was wrong with him. Obito however, couldn't smile despite seeing Rin. This world was cruel. Showing him the one person he'd sort after for so long. Waving her in front of him as if he would change simply by seeing her. Screw that. He wanted to bring the world to peace. He wouldn't get sidetracked simply because Rin was alive. He... couldn't. But he supposed he at least had the decency to not be cold to her. Even if she was only a temporary being.

"Oh, Hi Rin..." He mumbled, pain lingering around the mention of her name. Her expression cheered at his response, not picking up on the pain he so easily spilt from his mouth. He wasn't trying to hide it, but he couldn't say he wanted her to notice it either. Her smile was bright. Just as bright, if not brighter than Obito had remembered. It was almost calming...

"You missed training again you know? Minato-sensei asked for me to come to check up on you. So what's the problem? Are you feeling alright?" She asked sweetly with a smile. It made the Uchiha want to throw up again, and if he wasn't careful he might have just done that. However, he was too distracted by his feverish condition to actually heave at all. She was just so wonderful to look at. Obito hated it. He hated that he enjoyed being in her presence. She wasn't real. Or at least, she wouldn't last. Not in this world. He had to create a world where he could be with her without fear of losing her. But then... Dammit.

"Oh, Did I? Must've lost track of time.." He lied. Obito was well aware of when training started but was in no condition to attend. It had taken him long enough to get his bearings, let alone decide to leave and find Madara. Rin being here... and this... would make things a little more difficult he supposed. With his fever seeming to kick in, Obito brought a hand to his head to ease his pain. Not that it helped. Rin seemed to notice his discomfort right away, unfortunately.

"Are you alright Obito? Are sick?" She brought her hand to his head to feel for fever and found one quite easily. "You have a fever... Were you up all night training again? You know you don't have to hide it from me..." Rin fussed, shaking her head before pushing the Uchiha back inside the house. Obito nearly wanted to complain but didn't find it in himself to do so. What was it about her that made him so obedient? He hated it. He hated feeling so torn between what to do. And his fever didn't help at all. So with a huff, he sat down on the edge of his bed and allowed Rin to tend to his fever. She'd gotten a wet cloth and pressed it to his forehead. It went warm in under a minute and she went to rinse it to keep it cold. When she returned, Obito looked at the concentration her eyes clearly showed.

"Thank you..." He mumbled under his breath, his scowl barely managed to be suppressed. He didn't want to stay here... Did he? He needed to get back to Madara. Get the Rinnegan, and set out to collect the tailed beasts yet again... The thought seemed very exhausting... But he had to. For the greater good of the world? Why was he... Obito looked down at the ground, not noticing Rin's reply to his Thank you. Did he really want to leave? Rin was right here, wasn't she? She was... This was real. And no doubt because of his damn Kekkei Genkai.

Dammit. He blamed Kamui for making him feel so torn between what do to. But one last look at Rin's face. Her smile. It seemed to be all be needed to see clearly.

Authors notes

I haven't the slightest idea if this is any good. I tried to make Kakashi's and Obito's age closer than what it was originally since they are apparently like 3 - 4 years apart... I couldn't believe it so I did a good 1 - 2 year gap. I like the Idea of Obito being older, but that much older was a bit ridiculous. It seems that Kakashi isn't taking the travel all that well. However, he did have it a lot worse than Obito did since Kamui isn't technically Kakashi's using it drains him a lot more etc. But well see if this gets any likes and then I'll probably consider another chapter and then continuing it full stop. But please leave a review. Chapters will range within the 3k word area. Ok, that's all for now, and don't worry I haven't forgotten my other stories. Just wanted to write something different. And sorry for all the nausea talk but hey, travelling through time surely would have some side effects. Oh and the image isn't mine. I don't take annyyy creddiit foorrr itttt =w=