Disclaimer: I don't own Kingdom Hearts. This story was started by VanyelXFan and was given to me to continue. We will sort of be working on it together. She will give me the basic outline, I'll write the chapters, and she will give me notes. The first four and a half chapters were written by her and edited/tweaked by me.

Warning: Language and boy/boy. AU – alternate universe. Vampires, shifters, weres, and other various supernaturals. Don't like, go away.

2012 Rewrite: I lost interest in this story at one point due to my use of 2 original characters that had taken on big roles. So in the summer of 2012, I decided to rewrite and edit parts to remove them. Now every character in this story is from Kingdom Hearts and Final Fantasy. Hope you like it better. I do. Reread if you want. Small things where changed. Honestly though, I HAD to rewrite it. I began to HATE it and didn't want to work on it at all. And I had spawned a sequel, 2 backstories, and a short middle story. So… the rewrite has restored my enjoyment of the story.

Unlimited Addiction
Chapter 1: Unpredicted New Year

"No! Please… don't… I do-" The dark eyes met hers and her struggling stopped immediately. Dropping to her knees, the girl's eyes glazed over and stared at nothing as a pair of fangs dug deeply into the soft flesh at the base of her neck. It made a sickening squishing sound. A warm, metallic liquid hit the lapping tongue as lips sucked on the wound the teeth made. The fangs slid out as the dark figure continued to drink the deep red juice that dripped down its chin. After a while, in the darkness, the vampire started to feel quite full. He slowly pulled his lips away, licking all trace of his presence away. Her eyes slowly began to focus again and she dipped her head back as her dark brown hair brushed her shoulders, falling behind her.

"You've done well." A seductive voice melodically whispered into her ear, knowing quite well that she wouldn't remember what had happened. Arms carefully helped her to her feet as the figure stood up, brushing blood from his chin with his sleeve and licking the corners of the soft mouth with its tongue.

He glanced down at the white, button down shirt. The collar was flecked with blood, as was the sleeve. He knew better than to wear white when he fed. No blood shown on the loose, black pants he wore.

"Aerith, love, I believe I am done for tonight." He turned to smile at the girl beside him. "Please show our guest the door. And see that she..." He caught her eyes and his pupils flashed. "…goes straight home and forgets about coming here. Nothing happened."

"Yes." A woman slowly approached from the door that had opened just a few seconds before the creature was done. Her long, brown hair was braided down her back and her gentle eyes scanned the room. She moved easily in the dark, no light emitting from the hallway that stood just past the door.

His lips curled into a smile as he watched her movements. He still felt blessed to have her there, after all the years past.

In the dark, her face shifted to something of discomfort by the smell of the blood. She should have been used to it by now, but it still unsettled her. She couldn't shake it. Which was the very reason she there now, playing nursemaid. She dipped her head as she walked over to the girl, offering her a smile. "Go on upstairs, and wait for me at the front door." She waited until her orders were followed before looking down at the dark floor. She shook her head slowly as she leaned over to wipe up most of the blood on the floor with a white wash cloth.

Rushing to her with inhuman speed, the vampire leaned down and whispered right into her ear, "Don't." Slipping his arms around her waist, Riku hugged her from behind with her body still in a crouching. He pulled the bloodied rag from her hands. Pecking her cheek once, he memorized the light warmth that she held within her body. "I can clean up here."

She nodded, a slight smile on her lips, and rose. "Then I shall see our friend out."

He smiled as he watched and nodded. "Thank you so much. You have no idea how much I appreciate you." Pausing for a moment, he tilted his head slightly in thought. "Tomorrow is the first day of school, eh? I should probably work on looking 'fresh'." The soft voice chuckled at the thought as the vampire listened to her retreating form. He called out just loud enough for her to hear, "Good night."

-X-

He rose from the bed in his dungeon-esc room once he knew the sun was rising. No windows adorned the walls in the dark room. One reason was the room was buried under the ground. Another was the need to keep the sun out. Though it was unneeded for his sight, a light fixture hung from the ceiling and it could easily illuminate the entire expanse of the large room. Another unneeded thing in the room was the overly large bed at the center. If he so wanted, he could lie down on it, close his eyes, and summon sleep to take him over. But, unlike the humans he fed on and mingled with, he didn't need it to function. It was just a luxury he sometimes allowed himself.

He crossed the room towards the door that lead to the bathroom. Nothing appeared in the mirror as he moved to stand in front of it. A smile tugged at the corners of his lips as he heard the silent footsteps in the hall. To any other, they would have been just that, silent. But his keen hearing could pick up on the tiniest of vibrations.

"Aerith, love. I hope you slept well." He said loudly, turning as he heard her slip inside the bedroom door.

She nodded brightly. "Better than you."

He sighed softly when she held the needle out to him. Instead of taking it, he turned back to the empty mirror. "Do you mind helping me? I can't… quite…"

She dipped her head slowly as she turned the needle in her hand. She watched as the silver haired man placed both hands on the counter in front of a sink and leaned over. Her hands lifted the hem of his shirt, grazing the icy cold skin in the process.

Painfully, the needle pushed into the right side of his pale back. Hissing softly, the fangs showed as the vampire squeezed his eyes shut gently and took in a sharp breath. "Ahh, that n-never stops hurting." Just as fast as it started, the pain resided and the needle pulled out.

A deep, steadying breath was pulled into his lungs before he lifted his head. His reflection appeared in the mirror then, though now his eyes were struggling to see it. A bit of color washed over his porcelain skin and the black faded from his irises, showing the cyan underneath.

"You look great this morning." She said softly from behind him. Her dark features from last night were gone and she looked a bit drowsy, but very happy otherwise. "Planning on impressing the girls? And on your first day of high school." She shook her head, chuckling softly.

"Well, of course. I only get to do this every twenty years or so. And everything keeps changing with every new decade."

Turning to the door, Aerith flipped on the light and he squinted softly.

"Bah. You really should warn me before you do that." His eyes adjusted to the change easily enough, but took a bit longer than normal. Carefully looking into the mirror again, the vampire could see himself clearly this time and he smiled at the reflection. "There I am." He chuckled and posed in a joking manner. He was far beyond his years, but he was still very much a teenager at heart.

"Sir – Riku, you really are a simple minded fool, huh?" She gathered the needle, placed a plastic cap over the tip, and tucked it into her pocket.

Looking behind him past his reflection, Riku saw his surroundings clearly for the first time in a while. He took a long, lasting look towards the white tiles on the floor and the cream colored marble on the counters. The shower looked mostly unused as Aerith was the only one whom used it and that was a rare occasion. She kept it very clean, much like her own bathroom upstairs. The only indication someone regularly used hers was the strawberry shampoo and conditioner sitting on the little rack in the corner and the baby soap sitting next to them with a razor and shaving cream. Whatever it was with girls and beauty products, Riku didn't get. And he didn't ask.

Aerith smiled and slipped out of the room.

Laughing softly, he pushed away from the sink. He nodded with one last look in the mirror at himself. Silver hair flowed down his shoulders as a cascade of waterfalls and once again bright cyan eyes stared at his black muscle shirt. Loose black pants like the ones from the previous night hugged his hips just enough to not need a belt. Silver, shiny chains hung from packets on the side of his pants with a wallet in one of them and what looked like the outline of keys in another. His semi buff figure hung loosely under the perfect outfit for his pale skin.

"I think I am ready." He said softly. "What time is it?" He made his way through his room and into the hallway.

"7:06." The voice came from upstairs.

His eyes widened slightly as he bolted up the dark corridor and came out into the dimly lit living room. He shut the door behind him as he scanned the room. "Shit! School starts at 7:20!" Rushing around, he picked up his backpack and ran out the door, calling over his shoulder, "Have a great day!"

"You, too." Aerith smiled and shook her head slowly. She watched his slowly retreating form out the window. It still amazed her at the transformation. "Almost human." She absently wondered if Riku would see his stalker in school that day. She had a habit of showing up whenever he set foot out of the door in the sunlight. She pondered the thought as she headed down the hall to her bathroom. Without a sound, she turned on the hot water until it was scorching hot. She slipped off her clothes slowly, hissing at the rising steam, and stepped into the burning water.

-X-

Oh man, I need to hurry! Riku rushed as fast as his legs could to the school. Due to the shot that was coursing through him, his abilities were lessened. But he could still move faster than most people could focus. He burst in while the door was open and got to a hallway that had no one and stopped so it wouldn't look like he appeared out of nowhere. Made it… with three minutes until the first bell.

Silently, the vampire walked out of the hallway and made his posture relax as he pushed his face into a shy look, glancing towards each hallway as if it were intimidating. This is the worst part. He thought. I have to act like I've never been here before. Like it's my first day. He smiled to himself at the thought before forcing the smile away again.

Upon opening his first class door, he had to lean back as to not get hit in the face by a pencil.

"Please, oh..." A woman looking to be in about her thirties glanced around worriedly at her class as if they had control over her. "Please... sit… wherever you wish…"

Riku noticed at that second that her attention had turned to him and he tried to give her a reassuring smile.

Kids were talking quite loud and tossing things all over the room. A couple were making out in the corner of the room and head phones where on at least five kids' heads. "Oh boy..." The vampire took a look around the room and rolled his eyes. Taking his seat near the front of the room, he looked to the teacher.

"Okay, now that the bell has rung… "

Wait, when had the bell rung? Oh, this is going to be an interesting year. Sighing, Riku folded his arms in front of him and rested his chin on it.

"… we should start… class.." Noticing that the children were not quieting down, she looked sadly towards Riku as he was the only one not making noise.

Standing abruptly, Riku shouted loud enough so he was overheard. "Would you be quiet?!" Just as he became quiet, so did the class. "Thank you." Sitting down, he looked up to the teacher.

"Okay, uh... Your teacher couldn't make it today as he was sick or something along those lines, I will be your substitute today. Welcome to your fir-"

She was abruptly cut off as a kid shouted, "Oh, get over it, you old hag!"

Standing up yet again, Riku sighed. "Should I accompany him to the office?" He walked over to the kid and grabbed his elbow, making him stand up. The kid was about to the vampire's shoulder and had short, brown hair and green eyes. He was wearing shorts and a striped shirt. My… how school has changed yet again. Such rowdy students.

The sub's eyes widened and she shook her head quickly. "N-no, it's okay. I will just write a note to the teacher."

Riku's jaw dropped as he looked back at the teacher. What the... He was appalled as to why the teacher was being so… soft to all the kids. "Uh, okay?" He was not quite sure what to say and so he let go of the elbow and heard the same voice talking.

"Teachers pet!" The kid sat back down and the vampire just rolled his eyes.

"Hot teacher's pet is more like it." A girl to his right was whispering to another and giggled under her breath.

Just to add kicks, Riku winked right at her and thought she might faint with how her face turned red and how she swooned softly. Sitting back down, he tried to busy himself with whatever he could. Speaking up had probably been a mistake. He really shouldn't be drawing attention to himself on the first day. He had all year. But he had a compulsive need to be in charge.

Brring! The bell rang with a loud tone and Riku stood up and made his way to the door. He moved slowly and evenly, trying not to run as to not draw any attention. Walking down the hallway, he felt a shiver run down his spine as he walked by a group of football players and cheerleaders. He felt a pair of familiar lumps brush against his top lip.

Uh oh! Shit! Why is this happening? I ate just last night! Rushing to the bathroom within a human speed, Riku got to the room after covering his mouth to hide his dropping fangs with his hand. He got to the room and took his hand away, looking to try and see his reflection. The mirror gave him nothing. "Shit!" He cursed allowed and grabbed his backpack. He prayed Aerith had supplied him with enough of the black liquid to sustain him as he dumped the contents on the counter. Three small needles sealed in a bag rolled out and he breathed out a sigh of relief.

Quickly taking one of the needles firmly into his grasp, he slammed it into the bottom part of his back. Hissing, he bent over the sink, propping himself up. His shirt had been pulled up slightly to allow the needle access and again, just as fast as it started, the pain went away. Maybe school wasn't such a good idea.

-X-

Author's Notes: First chapter down. Onto editing the next one.