Summary: He lost everything, his parents his home and his sanity. The only thing he had left was him, and he was not going to lose him too. AU, insaneKaito, KaiShin...sort of, more of Bromance.

Author's Rant:…Some of you might feel familiar to this story v^^. Yeah, it's chapter 24 and 25 from my AU series :3. I just suddenly get load of ideas for this and decided to make it an independent story…of course, I was nervous so I asked Kaida-chan if I should or not and she said I should so I will ^^.

And yes, I copied and pasted part 1, 2, 3 and 4 in this from the AU but I added a new part at the end…And sorry to the readers that want to see insane Kaito in action, you'll get to see him in next chappie, promise!

Genre for this story: Family/Angst/Crime.

Beware of AU, OOC-ness, typos, stupid grammar mistakes, insane!Kaito!, massive Kaito-torture and child-abuse in later chapters.

Disclaim: Told you already, no, I dun own anything~!

File 1: The Locked Door.

The New Doctor and The Locked Door

Aoko was nervous, she really was.

It was her first day at work and even when the other doctors had treated her kindly and taught her so many useful things, she still felt anxious bubble in her chest when she received her first case.

"Her name is Koizumi Akako," the head doctor smiled, "She always thinks she's some sort of witch but other than that and a few of her strange saying, she's mostly harmless."

Aoko nodded nervously and opened the file to see a picture of her first patient, a girl, no older than her with long reddish hair and dear, this Koizumi girl was beautiful, Aoko had to admit.

"All you need is to talk to her and be her friend,that might help her a lots," the old doctor said kindly and Aoko smiled.

"I'll try my best, sir."

The man laughed good naturally, "I'm glad to hear so, Nakamori-san."

…..

A week had passed and Aoko had become more and more confident. Other than Akako, she had tended to around two more and it seemed that the patients liked the cheerful, sincere and nice Aoko very much. They were all traumatized in one or another ways and they chose to ignore the world and other people but they opened up to Aoko.

These people were mad, crazy and strange but their stories are interesting and they liked it when Aoko listen to the stories that their mind could offer. She was helping people to mend their hearts and minds and it made Aoko feel really proud of herself.

But then, something odd caught her curiosity.

It was the tightly locked door at the end of the corridor in the third floor.

She asked the other doctors why it was always locked and they told her it was the room of a really dangerous patient and only when Dr. Kudo came with you that you were allowed to go in.

Dr. Kudo…only him eh…?

And she wondered why…

The Quiet Doctor and The Locked Door

Aoko started to notice Dr. Kudo more often then.

Kudo Shinichi, an excellent doctor, a handsome young man and he was really quiet.

You'd never know if he was in the room or not unless he said something.

The nurses and other female doctors seemed to admire him really much, Aoko snorted, right, he was the 'tall-dark-and-cool' type, like a dark knight that had come straight from a manga or cliché movies after all. His rare talking didn't help the matter either.

She felt herself drawn to him too, but not because of his pretty face or nice body but rather, his odd connection with the locked door.

He was the only one who brought food or medicines to the patient there and he only tended to that patient alone. The head doctor didn't seem to mind though, according to him, only Kudo-san was able to handle that patient.

And so, Aoko tried to get to talk to Kudo just so she could ask him to show her the room…damn, he curiosity was really troublesome…

Kudo nodded absently as she asked him to let her come with him when he was about to bring food to the room. He only spared her a glance then muttered something that Aoko couldn't catch but she didn't pay much attention to it since the excitement was clouded her mind, she was finally able to satisfy her curiosity!

And to the locked door, they went.

And to meet the most dangerous patient, she would soon.

The Most Dangerous Patient and The Locked Door

"Remember, no calling him by his name. I can, but you can't," Kudo began as they walked to the Locked Door.

Aoko glanced at him curiously, "Can I ask why?"

Kudo shook his head, sighing, "If you want him to go crazy, then just say his name, Nakamori-san," and he looked at her bemusedly as her eyebrows furrowed together, "I assume you, it won't be pleasant."

"…Okay, I got it."

"I almost forget," Kudo groaned, "No mention of fish too, even just the word fish. He hates the thing and his name.

Aoko nodded mutely, deciding not to ask because they were talking about a mad patient, so there were always something strange and ridiculous about them.

When they got to the Locked Door, Aoko almost couldn't hold her excitement as Kudo fit the key into the lock, pushing the door open and stepping inside, Aoko followed suit.

As soon as he closed the door again, a man threw himself at Kudo, hugging him tightly and startling Aoko in the process but the other stood still, too used to it.

"I miss you sooooooooooooooooooooooo much!" the patient whined childishly, "Why didn't you come sooner?"

"Sorry, Kaito," Kudo said and Aoko blinked at his soft tone, she was too used to the dry tone he often used for the others, "But I'm here now, aren't I?"

The patient, Kaito, finally released Kudo to beam brightly at the doctor, helping Aoko to get a good look at him.

He looked almost exactly like Kudo but then, people looked like people was normal, right? His messy brown hair was just…messy, his violet eyes were twinkling with childish innocence and lively, unlike the other patients' and Aoko almost thought he was normal. But then, she had to remind herself that he was dangerous, he was locked by himself for reasons.

The patient's grin widened almost impossibly, "I behaved reallyyyyy well! Do I get a reward?" he asked hopefully and even though the other doctor had his back to her, Aoko could still hear the smile in his voice.

"Yeah, yeah. I brought you a chocolate cake today."

"Ya~y!" Kaito beamed again and glomped her fellow doctor. Aoko suddenly felt so neglected, it was like those two were in their own world and she was an uninvited intruder.

"By the way, Kaito," Kudo pushed the patient away gently, "I brought a friend today."

"…friend? Where?" Kaito blinked and then, those violet eyes set on her, making Aoko step back nervously.

His eyes narrowed, his lips formed a thin line and Aoko resisted the urge to flee from the room.

And before any of them could react, Kaito pulled Kudo into his tight grip again, glaring at Aoko dangerously.

"Shin-chan's mine! You go away!" he snarled, like an angered beast and his arms tightened around Kudo even more.

"I…Uhm…" Aoko stammered, she was at lost for words and she tried hard to think of something but those piercing and wild violet eyes made thinking become impossible.

"She's not going to take me away!" Kudo yelled in a strained voice as Kaito was gripping him to tightly that it made breathing become hard, "She's a friend! A friend like Shiho-chan! Stop acting like this!"

And from being a dangerous beast, Kaito turned into an innocent looking boy, "Really?"

Aoko nodded rapidly and Kaito blinked at her for a moment before s bright grin tugged at his lips.

"Nice to meetcha!" he released Kudo, who gladly gulped for air and held his hand up expectedly, "I'm Kuroba Kaito!"

Aoko eyed the hand hesitantly for a minute before attentively taking it, "I'm Nakamori Aoko…Nice to meet you, Kai-" she abruptly shut up as Kudo glared at her pointedly.

"New friend~! Ohhhh! New friend~!" Kaito cheered happily, like a little child that was getting his candy, "I'm soooooo happy!"

And Aoko instantly tossed her worries out the window. Because he seemed to like her enough then and he was not really different from the other patients.

And oh, naïve and innocent Aoko didn't know what was in store for her…

Taking Care of Kuroba Kaito

And Aoko came to see Kaito whenever she was free, with Kudo, of course. Kaito seemed to get used to her presence pretty quickly as he would present Kudo a red rose and then a yellow one for her.

Really, she was curious as from where he got all the roses and so, she asked Kudo, who shrugged and told her that maybe Kaito snuck out at night to collect them from the garden.

He had said so with such casualness and carelessness that made Aoko shudder. Because really, a mad patient could go in and out as he was pleased through the always tightly locked door was just scary…

She wondered then why Kaito was still in there and not running freely outside…and she mentally slapped her forehead, of course it was because Kudo told him to stay! And Kaito always obeyed the handsome doctor's every command.

Taking care of Kuroba Kaito, Aoko decided, was fun if not a bit tiresome.

She would watch with great amusement as the patient happily messed up Kudo's neat black hair and when he got bored, he'd whine and whine until the doctor smiled and told him stories. Aoko would throw a few comments in, and the three of them would be like friends, close friends…and Aoko loved that, it was just cute and endearing to her…

But she still couldn't shake the feeling that there was definitely something more between the doctor and patient.

Then again, Aoko found herself didn't care in favor of drowning in those peaceful days with the boys…which would soon end as one day. Doctor Kudo was called to go on business for days.

And that was when Hell broke lose…

The Calm Before The Storm

"Kudo-san will have to go away for a few days," the head doctor, Megure said seriously, "And we'll need some one to take care of patient Kuroba Kaito."

The doctors that were gathering at the meeting whispered to each other nervously, it seemed that no one wanted to take the job.

Aoko glanced at Kudo, who was sitting by the head doctor's side quietly. To anyone, he must be looking calm but Aoko could read him pretty well for she had spent pretty much time with him and Kaito.

His hands were clasping together tightly and she could almost see the tremble in it, his blue eyes were blank as he was losing in his thought. Then he glanced up at Megure hopefully.

"Megure-sensei," he began, "…Can we call Shiho back? She can take care of Kaito."

Megure shook his head tiredly, "As mush as I want to, Kudo-san, we can't. The new hospital she has been transferred to needs her as much as we do…"

"But she's the only one Kaito fears…only she can handle him…"

Aoko didn't know who this Shiho was but she sounded really cool, because Kaito feared her and as far as the messy hair doctor knew, Kaito wasn't afraid of anything.

Well, he seemed to like her enough, and if no one was willingly to take care of him, she would do it.

"I'll take the job," she said, raising her hand up bravely and everyone's eyes stared at her.

Feeling the attention she was getting, Aoko gulped nervously but still raised her hand.

"I've come in contact with him pretty much…so I don't think he'll mind me…" she explained timidly and Kudo rubbed his chin thoughtfully.

"Nakamori-san is right, Megure-sensei," and Kudo nodded after a moment, "Kaito is used to her so she's the best doctor for the job.

"Are you sure, Nakamori-san?" Megure asked her nervously and Aoko nodded determinately.

"Okay then, Kudo-san, please tell her how to treat Kuroba-kun properly," he told the blue eyes doctor who nodded and stood up.

"I hope this will turn out well…" he trailed off and Aoko felt a shiver run down her spine, she almost regretted volunteering to do the job but… Kaito and Kudo had become her friends and so, she'd do all she could to help them.

"Please follow me, Nalamori-san," he left the room without bothering waiting for Aoko.

Aoko hurriedly followed her and she didn't miss the pity looks and sad looks the other doctors were sending her.

…

"This is Kaito's file," Kudo handed her a blue file and the young female doctor hesitantly, gently opened it, as if she feared it'd bite her if she accidentally used too much strength.

Her eyes scanned the information and the more she read, the more confusion she got.

Name: Kuroba Kaito.

Birthday: 21st June.

Family:…

Mental state: Severally traumatized. Can be very dangerous when he is in hysteric state or depressed state.

Cause:…

And guess why she was confused?...there were too much missing information in Kaito's file!

Aoko looked up at Kudo questioningly and he shrugged, "Those are the information you're allowed to know…"

She wanted to know more and when her curiosity was about to act up again, she managed to swallow it down as the look in Kudo's blue, blue eyes was too painful.

She knew that he knew the missing information and he didn't want to tell her, so, Aoko would not ask.

And Kudo processed to tell her how to take care of Kaito even though she had watched him many times before. He had to take his medicine at exactly 9 am and 6 pm. Then she should sit and listen to his babble, remember to throw in a few comments. Aoko nodded, she could do these…the job seemed easy enough.

Kudo reminded her that Kaito could turn from being childish to being dangerous, innocent to insane, hyperactive to depressed and quiet to suicidal in a blink of eyes.

It made Aoko remember when they had first met…and she shuddered at the unwanted memory then swatted it down violently. Kaito was her patient then and she would not let her fear prevent her from doing her job!

"I'll do my best, Kudo-san," she said and smiled. Kudo sighed before smiling weakly back, "I really don't want to leave him but….business calls, I have no choice…"

And really, Aoko knew for sure then there was definitely something between the doctor and the patient.

xxxxxX TBC Xxxxxx

So…want next chappie :3? Then please do review! 'Cause, seriously, I can't write unless I know that someone want to read…it'd be pointless to write, no?

Read and Review~!