Heart transplantation! I had this story idea for a while. Now, it's time to actually get it in action! I really want to do an 8027 fanfic, but I guess that's not going to come up for a while. It's time for 1827, haha, with a little bit of 2796 here. I think Tsuna/Chrome(Nagi) is really cute!

;_; I know I have Invisible Gems to work on, but I spent the whole day typing this up. Thank goodness for no academy tomorrow! So, yeah... I don't even have a complete storyline for this fanfic, yet! If you have any suggestions, you can review it to me or PM me. xD Anything works... I hope you guys enjoy this short chapter. :P

...This will probably have a lot of mistakes. o_o;;

Disclaimer: I don't own Katekyo Hitman Reborn!

I didn't know that out of everything out there in this world, this would happen.

I know certain circumstances of my life lead to this, but... Oh, gosh. Why, out of all people, why him? I never even met him, only heard of him from Nagi, but my...so-called "heart" is beating frantically for him. I'm a guy, too! And I only like Nagi-chan! Not...this merciless person!

Even though I knew how well it happened...I just couldn't help but think that this was actually happening. How am I supposed to rid myself of this? If only I wasn't born with... Argh! I can't even say the word! Why is my life so complicated, anyway? ...I lost my best friend and love, just for this to happen?

"Herbivore, what the hell are you doing here?"

Hiieeee! Nagi-chan, what should I do?

. 1827 .

Nana Sawada and Iemitsu Sawada looked down to their newborn son, a cute boy with tiny strands of brown hair sticking out. He had been crying just a moment ago, but the crying ceased once the doctor had placed the tiny boy in the mother's arms.

He was giggling now, waving his cute little fingers in the air, attempting to reach for his mother's face. Nana let out a heartfelt laugh and allowed the small baby to wrap his fingers around one of her own. He was giggling even more now, familiarizing with the loving touch of his mother.

"Aw, he's so cute!" Nana squealed delightfully. "What should we name him, dear?"

"Tsunayoshi!" Ietmisu's voice boomed throughout the big hospital. "It's perfect for a girlish boy like him! Just look at his big eyes; they're fit for a girl! I'm sure he's going to find a boy to settle with, haha!"

"That's perfect! Welcome to this world, Tsu-kun!"

The baby stared at his new parents with curious eyes. Despite not knowing what was going on, the infant flashed a cute grin. The adults in front of his were radiating such warmth and love, there was no way he would have exchanged his life or keep it danger.

Well, too bad, Tsuna.

. 27 .

When he turned five, he was on his way back home from a fun day at the amusement park with his mother and father. They were all holding hands with one another, with little happy Tsuna in the middle. The boy was going on about how much fun the kiddy rides were and that he wanted to go back one day.

It's been like this for the past five years. Tsuna's life has been perfect. Everyday was a fun day playing with his mother and father. Also, pre-kindergarten wasn't so bad either. Sure, he didn't have as many friends... Scratch that. He had no friends at all, but he still enjoyed the day with his kind teacher. Okay, so maybe everything wasn't as perfect as it seemed, but his life was fun, nonetheless.

Tsuna let go of his parents' hands to slow down his pace. He loved looking at the glowing sky while the sun was setting. It gave the blue sky a color so different from blue. Though the boy loved looking up to the blue sky, he loved the orange sky, as well. Probably that's why his favorite color became orange. The small boy looked around, observing the trees, the flying birds, and the houses in his favorite neighborhood carefully.

A singing voice caught his attention. It was soft that it could be barely heard, but Tsuna heard it perfectly. He knew the voice belonged to a girl because of the pitch, and the fact that the song she was singing came out melodious. The brunet found himself stopping in his tracks and shifting his attention to the singing. He hadn't even realized that his parents were going ahead without him.

And, he hadn't realized he was pushing his way through a bush just to find who the source was. After squishing his way through the branches, Tsuna poked his head out and looked around to see who exactly was singing the pretty song.

Oh, there she was, singing by herself on the backyard porch.

She's so cute! The young boy found himself blushing bright red just watching the small girl. She had her head lifted up to the sky, projecting her beautiful voice to the orange glow made by the sun. Her hands were clasped in front of her chest and she was swinging her legs cutely.

What grabbed his attention was the abnormal hair color. Purple? That never suited people! But...it was really pretty on her. It suited her really well. The short purple hair looked really cute on her, and the small boy couldn't stop his blushing at all. Actually, his blush intensified each second that passed.

The song ended just then. The boy pushed away the remaining branches of the bush and walked up to her, who looked surprised by the intruder. Tsuna hurriedly ran towards her with his small legs and started clapping, with a bright smile on his face.

"That was really good, Chrome-chan!" the brunet gleefully commented. "You should be a singer when you grow up!"

Yup, the boy knew the singing girl, all right. She was Chrome Nagi Dokuro, the most quiet girl in his pre-K class. He had never heard the girl talk once, except during the introductions on the first day of class. Her voice was so soft that he could even barely hear her name! Of course, back then, Tsuna had developed a teensy weensy crush on the girl. She was just too shy, adorable, and cute!

And by listening to her right now, Tsuna practically fell for her even more!

Chrome blushed brightly from embarrassment and stared hard down to the ground. She was never comfortable with accepting compliments from others and being the shy girl she was, she never knew how to thank properly or react to the niceness. And coming from a classmate...that's so embarrassing! Then, she realized that the brunet was actually in her backyard...in front of her... Huh?

"Eh?" she shyly let out. "S-Sawada-san...why are...you here?"

The boy blinked before scratching the back of his head sheepishly. He stuck his tongue out to show his silliness. "Ehee, I heard you singing and it sounded really pretty! I came to see who it was and it was you, Chrome-chan! Your voice is really really pretty!"

Her eyes twinkled from the praise and she found herself blushing to her ears. For some reason, the girl didn't mind the boy complimenting her. He meant it wholeheartedly, so she was...happy. Joyful, even. Chrome put on a bright smile and stood up to bow.

"Th-thank y-you!" she blurted out hastily, putting herself in a ninety degree angle. "Th-that was very n-nice of y-you, S-Sawada-s-san..."

"You should smile more often, Chrome-chan! And don't call me Sawada-san, hehe. It sounds too old! You can just call me Tsuna!"

"Th-then you can call me Nagi-chan!" The blush on her face never left her. She awkwardly played with her fingers since she wasn't used to a meeting like this. She just wasn't used to having friends, overall. She was always isolated from the other kids since she was too shy to play with any of them. All this friendship thing was just too...weird.

Tsuna noticed the hesitation. He knew that she wasn't used to this. He wasn't either. That's why...maybe they can start a friendship for themselves? A no-good kid with a shy person. It can work, right? Deciding that it would, the boy grabbed both her hands and held them higher in the air.

"Let's be friends, Nagi-chan!" he said with much determination sparkling in his honey-brown eyes. "Let's stay friends until the very end! Okay, Nagi-chan?"

She was startled by his sudden outburst. F-friends? Until the very e-end? Was he really serious? She...never had a friend before. This would be her first, then... Friends until the very end. That sounded very nice to her ears. She could work with that.

A warm smile was tugging at the ends of her lips. Tsuna saw that she was starting to warm up and he smiled back, flashing his baby teeth to her. The girl grinned, too. This was their first meeting, a start of a new friendship, and they were both sure that it would last a long time.

"Tsu-kun! Where are you, Tsu-kun?"

"Tsunayoshi! Papa and mama are looking for you!"

The brunet jumped. He had forgotten all about his parents! He was so occupied with having a new friend that he never even noticed being gone for a long time! He turned his attention back to the petite girl in front of him. Smiling once more, the boy squeezed their hands together.

"Nagi-chan, I'll see you at school, okay? We'll talk there!"

"Okay, Tsuna!"

Their hands parted and Tsuna rushed to the bush. Before he disappeared for good that time, the boy gave another smile to Nagi and waved. Smiling, the purple haired girl waved back, still with the blush on her face. It was a nice meeting and both of them never regretted seeing each other that time. Nagi never regretted once singing in front of a stranger.

Tsuna found his parents not far away from Nagi's house. They were both relieved to have found their missing son and hugged their precious son tightly. The brunet laughed and hugged back with his small arms.

"Where were you, Tsu-kun? Mama and Papa were very worried about you!"

"I made a new friend, mama! She's in my class, too! Her name is Nagi-chan and she's really pretty, sweet, and cute!"

"A girl?" Iemitsu questioned, before letting out a hearty laugh. "Well, wasn't I wrong that day? Looks like our Tsunayoshi has hots for a pretty girl already! Tsunayoshi, you have to make sure you keep her in your heart! Okay?"

"Okay, daddy!"

Right after he had said that, the boy let out a cough. It wasn't like a regular cough, though. A string of coughs were let out from his mouth and they sounded hoarse and heavy. He was starting to feel a bit woozy and lightheaded. Not being able to keep his balance anymore, Tsuna started to sway side to side and soon enough started falling.

Thankfully, Ietmitsu noticed his son's motions and caught him before he fell to the ground. He looked to his wife and worry and glanced back to his now unconscious kid. The blond man gripped on the brunet tightly and headed to the house, silently with the woman besides him.

. 2796 .

Throughout the next few years, Tsuna and Nagi had been close. Real close. Ever since their first meeting, they've stuck with each other through thick and thin. At first, the pre-K kids were startled by the girl even opening up to anyone and by the boy even making a friend. Everyone was suspicious and couldn't believe it, at first, but the two began to show that nothing would break the friendship they shared.

And as best friends were all they stayed. Tsuna had always tried giving hints of his love to his best friend, but she never caught the hints. And being the coward he was, Tsuna never dared to tell her face-to-face. Besides, the boy never stood a chance. There was so many other better guys out there and he was a nobody compared to them.

Also, he never will have a chance. After all, Nagi had fallen for someone already. And man, he never failed to receive good points about the boy she liked.

It was always a wonder how Nagi would fall for him. Out of everyone. Really? Him? Tsuna was sure that if he ever turned to a girl, or was gay, he would never ever ever fall for... Seriously, Nagi-chan? How could you fall for him! I think even I could beat him...!

A knock on the door broke the brunet away from his thoughts. Tsuna shouted a "come in" and a shy head poked out from the door. He smiled warmly to the person, while blushing a bit on the way. He motioned for the girl to come closer and sit by the bedside.

Nagi smiled warmly to her best friend as she took a seat on the empty chair. "Are you feeling a bit better, Tsuna? Were you doing okay today?"

It's not like he could stay at mad at who she chose and herself. "I'm okay. I'm not perfect right now, but I'm feeling okay..."

The poor boy started running out of breath after saying that. Nagi quickly reached for the air mask and placed it on the boy's mouth. After catching his breath, the brunet sighed contently and turned to his best friend with a thankful look.

"How was school today?" Tsuna asked, not wanting for Nagi to be worried.

Her smile dropped a bit. "Um...I decided to tell him how I felt."

His own smile fell from those words. She confessed...? No one would reject a cute girl like Nagi. Probably...that boy had a change of heart and picked her. Nagi was cute, smart, pretty, and got looks that many girls killed for. Really, many guys had asked Nagi in the past, but she declined all of them. She only had her eyes set on one boy. One...crazy boy.

"And what did he say, Nagi-chan?"

She bit her lip and stared down to the ground. "He said no..."

No? ...Then does that mean I still have a chance? No, I shouldn't use this as my advantage. Nagi-chan really liked him... I should be comforting her, not cheering by myself. But...then again...I have hypertrophic cardiomyopathy. If I don't get a heart soon...I won't even be able to stay with Nagi-chan long... Oh, why did I have to be burdened with this?

It was true. Since he was young, Tsuna was infected with cardiomyopathy, which caused his heart muscle to thicken and that had interfered with his heart's ability to deliver blood around his body. The doctor had mentioned that it was usually linked with a familial past and passed by genes. It turned out that Tsuna's long time ago grandfather, Giotto, was infected with this disease. And now, it was Tsuna's turn.

At first, it wasn't as serious so the boy was given medication to ease the pain. However, that wasn't the case anymore. Once he reached his thirteenth birthday, it had gotten serious to the point that he had to stay in the hospital and get out of school, which left only Nagi going to school for the time being.

The doctors insisted that it was best for Tsuna to get a heart transplant if he wanted to live. Since they did not want their son to meet a cruel fate and live short, Tsuna's parents agreed to the idea. Right now, the boy was on the waiting list of receiving hearts. So far, it never reached his turn to get a donor heart nor was there much hearts to begin with.

The news had struck Nagi badly. She made it a routine to visit her best friend after school everyday and tell him about what happened at school and whatnot. She had always cried the first few days, but soon accepted the fact that Tsuna was never a healthy boy to begin with. And, besides, this wasn't his fault. Getting cardiomyopathy was something they never expected to happen, and now...

"It'll be okay, Nagi-chan," Tsuna said softly, reaching a hand out to the almost crying girl. "There will be someone else for you, I promise. And, it's not like you would expect him to be going out with anyone. He rejected every single person that asked him out... I'm not helping, am I?"

Nagi shook her head and put on a better smile. "No, you're right, Tsuna. I should have never fell for him... But, I can't help it. I don't think I'll be able to fall out of love."

The boy put on a pout. She must have fallen for him...a lot. "I'll be here for you whenever you need, Nagi-chan. So, don't give up, okay? I'm always cheering for you."

"...Don't leave me, Tsuna."

A small smile made its way to his face. "Alright, Nagi-chan. I won't."

. 2796 .

She was upset the whole morning walk to school. Firstly, the rejection wasn't helping at all. Secondly, the possibility of her best friend leaving anytime soon was killing her! Thirdly, her mother yelled at her for some stupid reason she wasn't really paying attention to.

Nagi never had a good relationship with her parents. Her mother and father both worked at rich jobs, so they were pretty rich. However, her mother hated her. The reason, Nagi never knew why, but it hurt her. It's been like that ever since she was young. Her mother never cared, and her father would always go to his wife's side. No one had been with her.

Except, Tsuna, that is.

The boy always held her close, no matter what. He accepted everything about her. Really, Nagi couldn't ask for any other best friend. Sure, Tsuna wasn't all that good when involved in some physical activity, but he was sweet, kind, caring, and loving. She cherished him closely, as if he was her own brother. Tsuna gave her a reason to live for and she couldn't thank him enough.

"Neko-chan..." she called out to the kitten in the street. "Neko-chan, you're going to get hurt there... Watch out!"

Her body took over as her mind flew off somewhere. She was rushing to the kitten in the middle of the road, neglecting the bright red light signaling not to walk.

And at that moment, she was thankful her last thoughts were about her best friend...

. 2796 .

"Tsu-kun! The doctor found a heart for you!"

The brunet widened his eyes in surprise. He was next on the waiting list? And they found a heart for him? This...this was good news! He couldn't wait to tell Nagi! ...Ah, but that would have to wait after school. He smiled, knowing that it could be a surprise for her.

The heart transplant was a success, thank goodness. His organs weren't really used to the new heart, so he would have to stay in the hospital for some additional time until his new heart was accepted.

Once the surgery was done and over with, the boy weakly opened his mouth to speak. "Doctor, whose heart...did this belong to...? I want to thank the person properly..."

The older man was hesitant to answer. He knew of the visitor that frequently came to the hospital to stay by the boy's side. He knew of the bond that they shared...a bond that would not break so easily. He knew of the friendship they possessed and the sibling-like relationship between them. But, the brunet asked and it was not his place to not answer.

"...Chrome Nagi Dokuro."

. 2796 .

Geez, that was an awful beginning. n_n...

I really wish it turned out better, but I don't feel like re-typing everything and editting everything. It's not my best work, but it'll do...for now. Don't worry! I already have 4 pages of the next chapter for Invisible Gems done! If you guys are reading that story of mine, haha. Compared to my other fanfic, this is...horrible. D:

I'll update this when I actually have an idea of how Tsuna and Hibari's relationship will develop. xD And I promise! He'll appear in the next chapter! Hopefully ;_;...

Review? c: .