Itachi Uchiha was quite certain that his best friend was an idiot. It didn't matter that said best friend was older, of a (technically) higher rank, and was already killing enemy ninja while Itachi was still in diapers. Shisui was an idiot.

The Idiot, as Itachi now referred to him in his head, was on medical leave. This meant that the ninja, who had just come back from a five-month long mission, was injured, and was supposed to be resting. Keyword being supposed. Instead, The Idiot was prancing along the training field in a multitude and weird mixture of different taijutsus forms; forms that definitely didn't belong to the Uchiha. Itachi noticed a few moves stolen from the Hyugas, a couple jabs stolen from Maito Guy, and even a few foreign moves that he had trouble recognizing. Shisui Uchiha was an idiot; but also kind of a genius.

But despite his taijutsu prowess, The Idiot just didn't know when to rest. He had a Kami-like level of pain tolerance, and he used it in order to just ignore the obvious signs that he should stop training. At this rate, The Idiot was going to cripple himself by the time his forced Medical leave was over. So Itachi did what Itachi had to do. He told on him.

The Third Hokage was not happy to hear that one of his best ninjas, and hopefully successor, wasn't taking care of his health. The boy sustained multiple injuries during his last mission, and not just the surface wounds. Multiple broken bones not healed correctly, and what Sarutobi suspected was a concussion. He couldn't force the boy to go to the Hospital, especially since the very next morning after his return, his wounds were all mysteriously stitched up, and his broken ribs set and wrapped. He couldn't even force him to stop training. What the Hokage could do, however, was give the boy busy work. Something so menial and exhausting, that training would be the very last thing on his mind.

Shisui, despite his petulance, was a man of his word. The very next day after making the agreement with a certain blond, he turned up at her, sorry their, apartment to give her his share of this months rent. Obviously, because he was a jonin (and it was an unwritten law of Konoha that every jonin had their own oddities), he couldn't come in through the door; oh no, that would be too normal. Instead he climbed through the window, much like he had two nights previous.

Naruto, who was lounging on her couch reading a book on pranking, yelped loudly in surprise as the dark-haired teen launched himself through the window. She placed a hand over her heart in shock, "Why don't you just use the door!"

Shisui chuckled as he plopped down next to her, "You haven't given me the key yet."

Naruto's eyes narrowed in suspicion, "So why didn't you just knock?"

Shisui leaned back on his hands, placing his feet up on the table, "Now where's the fun in that?"

"You're injured, aren't you supposed to be resting?"
The Uchiha grumbled, "Why does everybody keep saying that? First Itachi, now you."

Naruto tilted her head to the side, a movement that Shisui found absolutely adorable coming from the little girl, "Who's Itachi?"

"My best friend, he's a year younger than me and in the ANBU. Apparently, he's convinced I'm over working myself. Which is ridiculous, I think I know when I've been overworked." Shisui scoffed.

Naruto sighed, "You know, for a 'legendary' jonin, you're kind of an idiot. You're just going to hurt yourself even more."

Shisui patted the girls head condescendingly, "Sweetie, when you reach my level of skill, you know how to train without straining yourself."

Naruto fumed in anger, "Ugh, it's not even worth it. Now why are you here?"

The Uchiha grinned, which is a look that looked very very off on the face of a Uchiha, "Well Naru-Chan, I live here too! I'm just dropping off my half of the rent, as promised." He said, passing the girl a wad of bills.

Naruto took the money, counting them with a speed that rivaled professional accountants, "It's all here. You're really gonna help me?" She asked incredulously, her jaw dropping.

Shisui smiled, "I'm a man of my word Naru-Chan. Plus, we're helping each other. I need a place to sleep when I come off long missions, and more importantly, a person I trust to heal me when I'm injured."

Naruto gaped, "You… you trust me?"

"I'm moving in with you, aren't I? Plus, the other night you healed me with no alternative motives. Me; a stranger who broke into your apartment in the middle of the night. Of course I trust you."

The Uzumaki blinked away the tears that threatened to fall. She never had someone trust her before. Sure, the Hokage and Iruka liked her well enough, but they didn't exactly trust her. She was sort of friends with Shikamaru, who trusted her to wake him up when Iruka-sensei asked a question, but this was different. Shisui was trusting her with his health, his secrets, and in an essence, his life. Naruto wouldn't let that trust go in vain, despite him being annoying as hell.

"I trust you too Shisui." She stated softly, smiling.

Shisui grinned once more, "Plus, it's nice to have somewhere to run away to when I want no one to find me. The Uchiha compound, while huge, is much too easy to find. This way, I have a place where no one will even think to look for me."

"Other than me of course."

"Other than you of course." He agreed, "But then again, I don't really mind you all that much. Despite being just an Academy student."

Naruto glared at her new roommate, "I'm more than just an Academy student you know."

"Well of course! You're also an adorable little blond. Boys will be all over you in a few years."

Naruto blushed, perhaps in anger, "I'm not adorable."

"Yes, you are."

"I'm going to be Hokage, mark my words!"

"Not if I get there first."

Shisui was a pragmatic man. Yet he couldn't stop the slip of tongue that presented itself when faced with the leader of his village; the formidable Third Hokage.

"Are you senile?"

Sarutobi watched in amusement as the young jonin attempted to pick his jaw off the floor, "Senile?"

Shisui blushed, "I meant serious. Are you serious?"

The Hokage chuckled, "I fear that I am quite serious. We need a replacement. You're the only one qualified enough to fill-in on such short notice."

"Perhaps a little too qualified." Shisui muttered angrily under his breath.

"I'm sure you'll find some way to keep yourself entertained." Sarutobi said, passing the younger ninja the mission file.

Quickly flipping through it, the Uchiha grinned, "I'm sure I will."

Naruto was having a pretty boring day at the academy. After Shisui stopped by earlier this morning, Naruto was able to finally pay off her old-bat of a landlord. While Uchiha was amusing enough to cover her fair share of humor for the day, she felt that perhaps the day was getting to be a little too normal. Ever since the over-energetic jonin stumbled through her window a few nights ago, Naruto's life hasn't been the same. But the Uzumaki needed some normalcy.

So with that in mind she concocted a prank against her favorite teacher; Iruka-sensei. She was in the midst of planning how to set off the paint balls that she wanted to get rigged to the windows, when the door opened up. It opened to reveal a man who was definitely not Iruka, but unfortunately for Naruto, he was just as familiar.

"Hey Class! You guys can call me Shisui-sensei. I'll be your substitute teacher while Iruka is on a mission." The dark-haired teenager introduced as he strolled into the classroom and plopped down on the desk.

"Woah. You're hot." Ino declared, with a slight amount of drool dripping from her mouth. Sasuke, who was unfortunate enough to be seated in front of her that day, scooched a bit away from the mind-traveling blond. Despite Sasuke's clear discomfort, every girl in the class was having a similar reaction, other than two. Hinata was too busy avoiding eye-contact with her attractive teacher, blushing and poking her fingers together in shyness. Naruto on the other hand, was banging her head repeatedly on the table, muttering, "Why. Does. Kami. Hate. Me. Kill. Me. Now."

Shikamaru, who sat behind his energetic friend, shot her a look of confusion before returning to his nap. The rest of the boys in the class just looked uncomfortable, and slightly jealous of the handsome Uchiha.

"Why are you our sensei! Surely there are people better suited to teach us." Kiba exclaimed.

Shisui smiled bitterly, "Well, I'm your sensei because the Hokage thought that teaching a bunch of Academy kids was a better use of my time than, oh I don't know, going on an actual mission."

"Maybe he thought that because you're too injured to even raise your hands above your head." Naruto mumbled, her head still plastered to the desk.

Of course the jonin heard her, "I'm sorry Naru-chan, would you speak up? I can't exactly hear you when your face is glued to your desk." The boy said with a grin.

Naruto put her head up, glaring at her grinning roommate. Sasuke just looked between his cousin and classmate, wondering how they knew each other. Just the previous day, Naruto was asking about him. So how were they now acquainted? It seemed like Sasuke was the only person who noticed the odd exchange, as he was sitting right beside the Uzumaki, while the other girls were busy drooling, and the boys were busy glaring.

"But why would they have a kid teach us? Even I could take you on." Kiba boasted proudly.

Both Sasuke and Naruto scoffed simultaneously, before sending each other a look of bafflement. "Stop copying me Teme." Naruto bit out.

"You first Dobe." Sasuke replied bitterly.

Shisui just smirked as he watched the exchange, "Well Inuzuka, I may be a little young, but I assure you, I could probably take you on."

"Yeah! Want to prove it!" Kiba cried, standing from his seat.

Before Shisui could respond, Naruto spat, "Sit down Kiba! That's Shunshin no Shisui. He's a strong ninja you idiot, he even has a bounty on his head. Now stop making a full of yourself before you embarrass yourself even further. While he may be excitable for a Uchiha, he's still a vindictive bastard." Noticing the look Sasuke was giving her, she continued meekly, "According to the rumors, I mean."

Kiba sat down embarrassed, while Sakura questioned, "Wait you really have a bounty placed on your head?!" Shisui couldn't help but notice the adorable speech Naruto gave, and how she neglected to mention his rank of jonin. Huh… How interesting.

The elder Uchiha chuckled, "That's what they tell me."

"How?! You're so young!" Ino cried.

"People keep mentioning that."

"Because it's worth mentioning!" Sakura exclaimed.

Sasuke looked uncomfortable with all of the attention that his cousin was receiving from his classmates. Noticing this, Naruto slid over to his side, whispering, "If it makes you feel any better, at least the girls are too busy fangirling over him to look at you."

Widening his eyes in understanding, he replied, "Huh. That does make me feel better. Though I'll deny it if you ever mention it again."

"Oy! Love birds! Are we too busy flirting to be paying attention to me?" Shisui called out to the two rivals, his eyes sparkling in amusement.

Naruto and Sasuke shot him identical glares, before muttering simultaneously, "Go to hell."

The two once again looked at each other in bafflement, uneasy with the idea that they could actually agree on something.

Shisui, of course, heard them, but he decided to be nice and let it slide, "Well that's enough about me. Everybody turn to page 87. Sasu-kun, start reading from the top."

The younger Uchiha once more glared at his cousin, as Naruto burst out with laughter. Maybe having her roommate as a substitute wasn't too bad.

Naruto was wrong. Shisui was the absolute worse. Not only did he pair her with his emo little cousin, he even kept making references to the two of them liking each other. Them: Naruto and Sasuke. They were way more likely to kill each other than go on a date. The only salvation was the fact that no one else in the class seemed to notice the Uchiha's over-familiarity with the blond Uzumaki.

When Naruto got home that day, she was dismayed to find that the bane of her existence had already beaten her there. Shisui was laying across the couch, reading a file containing information on all of Naruto's classmates.

"Hey Naru-chan! How was class today? I heard that you had a total Babe substituting for you guys." He greeted with a satisfied grin.

"Go to hell Uchiha." Naruto muttered, making her way into her bedroom and slamming the door behind her.

Shisui's chuckles could be heard from where Naruto had her head buried under all of her pillows. This was such a bad idea.