This story takes place before Yuki Cross turns in to a vampire. (In my VK universe that may not even happen.) And it's a Zeki fic. Although I like Kaname as an interesting character to mess stuff up with, he's way too creepy for my liking otherwise. I have made some truly minor changes in the common VK facts and they are all in the first chapter which is more of a summary of mostly Zero and Yukis childhood because I wanted them to be closer than in the manga/anime.

Well, I am truly torturing poor Zero in this one. But I would say it is in a very fluffy way. This strange story just popped up while daydreaming (starting to notice I'm a big fan of sweet torture ehe...) after reading something about lust as a phenomena connection to vampirism. But it will have a happy ending (is that a spoiler BTW?) The original title is The Sexual Nature of Former Human Vampires, but don't know if that's allowed here so changed it.

Yeah, this is an M-rated story if anyone has missed that. And this is my first fan fiction ever, and English is not my native language, and although it's not bad it will probably be some grammar/spelling that is not correct so please bear with me.

Ok, that's all folks :-D. Happy reading and oh, reviews are very welcomed, bad as good ones ;-)

Chapter One

PROLOGUE

It was Friday night and the patrolling was finally over. Cross Yuki, sixteen years old and a guardian at the Cross Academy, sighed relieved and gave into a wide yawn, some sleepy tears building in the corner of her eyes as she did so. It had been a quiet night and although this was a good thing, these calm nights were in fact the hardest ones to patrol. It was not easy to stay awake after a long day with tedious school work, when the silent darkness started to fall and there were not much to do. She had been searching for her guardian partner to have someone to talk to, and maybe someone to steal some warmth from, because the night had been quite chilly, but Zero had been nowhere to find.

Kiriu Zero was her adoptive brother, her closest friend, her fellow guardian and so much more. Six years ago his family of vampire hunters had been murdered by a pureblood vampire named Hio Shizuka. For reasons unknown she had left Zero alive. He had dragged himself through the small sea of blood the pureblood had created out of his family's bodies, and curled himself up between his dead parents, holding his cold twin brother tightly embraced in his arms. There he had lain for almost three days before his sensei Yagari Touga had found him. When he had kneeled down beside his young apprentice he first thought the kid dead too, but two lavender eyes shot open, locking with his only one. "She bit me," the boy said calmly but his large eyes betrayed him. In them Tauga saw fear, pain but most of all rage. They both knew what it meant to be bit by a pureblood though. "Please kill me sensei..." Zero pleaded. "Please!"

Touga would not, or rather could not, do that though, and unable to take care of the child himself he left Zero to Yukis father, Cross Kaien, an old colleague and retired hunter who he knew would take good care of the kid. However for some reason Zero never trusted Kaien well enough to let him care for him. Maybe it was because it was Kaien that finally managed to bend Zeros arms away from his brother when Touga no longer could bear the boys heart wrenching screams, and merely had left the room leaving that hard task to his old friend. Well torn away from his brother and after several threats to kill Kaien as the old hunter carried the raging boy out of that doomed house, Zero did not speak another word until almost a year later.

No one had told Yuki about all these details, and of course Zero never spoke about that fateful night, but she unintentionally learned most things through Kaien and Toguas somewhat indiscreet and often high-pitched discussions on how to handle the not talking, very stubborn and not at all cooperative boy. Somehow she never picked up on Zero being a vampire though. That, she found out much later.

When the two grown up men mostly argued about how, and what to do, the child Yuki just did. And soon they noticed how the silver haired boy that shied away from everyone else seemed to connect with her as he followed her like a pale shadow wherever she went.

Zero stayed in a near catatonic state for almost the full first year he had lived with them. Besides not speaking, apart from when dreaming, Yuki had to bath him, dress him, cut his food and feed him too.

Later Zero had told her he had almost no memories of that first year, something Yuki was thankful about. She remembered all too well his raging fits and his nightmares, him calling for his parents and most of all for his twin, and they never answering him. His pained screams as Shizuka bit him over and over again as soon he dared close his eyes.

She abandoned her own bed, alongside with her good night's sleep, for years to come. It was quite convenient though, because now she too had someone who comforted her after her own bad dreams, someone who understood. Because Yuki had herself bad memories, or rather no memories at all before she was five years old, though sometimes she was plagued with bad flashbacks when she slept.

One morning though, she woke up and felt the coldness of being alone in their bed. This had never happened before as Zero never left the bed if she not dragged him out of it, and she felt panic thug at her heart. Then the door creaked open and Zero came in with one plate in each hand.

"Oh," he said. "You're already awake?"

She had just stared at him.

"Well, uh, I made breakfast." Reaching her a plate. "Blueberry pancakes, your favourite huh?"

Then he sneaked down in the bed beside her and put his plate in his cross legged lap and started munching away on his own pancakes. Eating in a very civilized manner with fork and knife, although he the day before had not been able to use those same cutleries at all. Her heart clenched when she noticed he had put her favourite ice cream on her pancakes too, he himself apparently not liking ice cream, because he had always turn his face away when she had tried feeding it to him.

"You are speaking," she had finally said, staring at him in awe, tears welling up.

"Well, if you're going to cry about it I will never speak again!" he hissed and gave her the first prototype of his later well polished glare.

After they eaten though, she not daring say anything else than that the pancakes tasted really good, he had pushed her down into the pillows, and being two years older and therefore much more stronger, held her there while he tickled her until she cried out of laughter. "You Baka!" he had said with a small smile as he let go of her. "Of course I speak. I'm not mute you know."

Then they had curled together, face to face and started talking. And, not having slept very well in the night because she had stayed awake caressing silver hair and a trembling boy, she had fallen asleep again, her head against Zeros chest feeling him holding her close.

Since then they had been almost inseparable and it was one of Yukis most precious memories.

They had actually slept in that manner, tightly curled up in each other arms until just a couple of years ago. Sometimes, no, really quite often, she still missed sleeping with him like that. She wondered if he missed it to...

But now Zero all of a sudden had started to avoid her. Ever since his vampire instinct had started to kick in. It hurt and she missed him terribly. Sure, in some ways they had became even closer with him taking her blood and all, and that complete trust it made them feel for each other. But they never casually hanged out anymore as they had done before. Of course she tried to, but now Zero showed her of most of the time.

No, she sadly shook her head to herself. Uhu, correction; most of the time he was nowhere to be found, like tonight.

Zero had always had those strange dark moody days which almost always came out of the blue. Over the last year they had grown more and more frequent until him one night had attacked her and bit her. It was about half a year ago now. Since then Yuki had almost grown an expert in the vampire nature, spending many hours in the library. Every book covering the subject contained though this quite disturbing and thick (further inflicting its importance) chapter most usually titled The Sexual Nature of Vampires.

Yes. Apparently vampires were very sexual creatures, needing much more, and feeling much more pleasure, in touching and sexual activities, than humans. And in the subchapter The Sexual Nature of Former Human Vampires she had read that the drastic increased sexual need often was seen as a big problem and one of the reasons why the former humans turned in to level E's.

Yuki shook her head and let go of a small embarrassed sigh and wondered how she was ever to be able to talk to, and help Zero regarding that matter. She fell into the gravelled path down to her father's house where she and Zero almost always stayed over the weekends.

She really felt for Zero with all those changes he and his body where going through. If it had been her and her body going on a rampage like that, she probably would have gone crazy a long time ago. Yet he kept on fighting. Zero was so brave!

As she now had a pretty good idea of why he avoided her, things felt a tad bit better, but she still missed him and she was getting tired of that. She wanted him back.

Besides I really like touching him, she naively thought to herself and then immediately blushed as she came to think about some of the more illustrative pictures in those chapters she had read. Well she had never touched him in those ways but...

She suddenly heard crunching from other footsteps against the gravel and before she knew it, Zeros tall, lanky frame was by her side. His hands were stuck in the pockets of his slacks and his head tilted downwards, his unusual silver hair shielding most of his handsome face of. She studied him out of the corner of her eyes, wondering whenever he had grown so tall. When she first had met him they had been of the same height. Now she was stuck at 157 cm since forever and he just seemed to keep on growing. She did not even reach his shoulder anymore.

"It's unfair," she muttered.

"Huh, what is?" he asked.

"You being so tall and me... not so..."

At this he actually snickered and ruffled her hair. "That's because I stem from a family of tall and proud hunters... and not some clan of short clumsy trolls."

"Oyi, I'm not a clumsy troll!

"Could have fooled me... Who was it by the way who this morning dropped her fork from her plate as she walked to the table, then stepped on said fork tripping, and ended up with the food all over herself?" The corners of his mouth actually tugging into a small smile as he remembered her surprised face before she realised what just had happen. So sweet...

"Yeah, but that was-" Yuki blushed madly at that horrible memory.

"Oh, and have you looked at yourself in a mirror the last year or two?"

W-what?" This caught her off guard, and the insecurity only a sixteen year old girl can muster kicked in.

Zero noticed it immediately. "Aw you Baka!" he groaned and then stretched out his arm and touched his index finger to her chin, then showing her the fingertip covered in mud. "You have mud on your chin, and your hair looks like a total mess. Like birds are nesting in it. That was all I meant."

Yuki stopped. "Oh," she said blushing again. Then she realized one thing and punched him on his arm. "Zero! My hair only looks like a mess because you ruffled it!"

He merely snickered at her again and continued walking.