AN: Hey guys! This is my first ever fanfic so please don't be too harsh. It's based around the time after Zero first bit Yuki. He's still on the verge of going Level E. But yeah! I hope you enjoy. xoxo Also I would love some feedback on what you think? And if the chapter ends with (continued) it means I'm still in progress of writing that chapter.

Chapter 1

-Yuki-

The moon looks sad tonight.

Yuki stopped suddenly then and shook her head. She didn't know where that thought had come from. Moons couldn't be sad. They were just big ol' rocks in space, but still the thought had seeped into her mind, and what made it even more confusing was that deep in her stomach something told her that she was right.

She glanced up again at the moon but then sighed heavily.

She was going to be late for dinner if she didn't hurry.

Glancing once more around the school grounds, she made sure there were no mischievous day class students trying to sneak out to get a glance at the night class students. Thankfully tonight everyone was where they should be.

She wondered then where Zero was. He should have been out here helping her patrol the grounds, but she hadn't seen him…. Actually now that she thought back to it she hadn't seen him all day.

Worry clenched her stomach and she hoped he would be at dinner. She hoped he was ok. Lately she had been so worried about him. He'd been growing more and more distant from her and she knew it had to do with the fact that he was ashamed at the changes that were happening in his body. It was only last month that he'd fallen to the urges and took her blood from her in the stairwell. Since then he'd fed from her but in the past weeks he'd declined her more and more when she told him he needed to feed.

She knew he hated himself and fought against the hunger, but it was only hurting him more and more when he tried to fight it.

He would rather die than hurt you.

The words whispered to her and her heart ached for him.

I would give my last drop of blood to you Zero if it meant you would feel no pain.

She could never tell him that. She knew if she did he would never feed from her again… and then would fall to a Level E.

She shook in fear at the thought. She knew it was inevitable but the longer she could keep him from falling the better. She wouldn't give up on him. Even when he asked her too… even when a part somewhere deep inside her told her that she would have to let go…

NO. Zero I will never let go! I will never give up! Tonight I will make you take my blood. I will not loose you…

With that thought she hurried back to the headmasters house where she and Zero also stayed sometimes and a new determination filled her being.

"Oh Yuki! I long for the days when you and Zero would have dinner with me every night! We were like a big ol' family then, huh?"

Her headmaster's voice was high and sad, but Yuki wasn't paying attention. He always went off on these random sad rants and answering his question would only make him delve on it further.

She swished around the soup in her bowl as she stared across from her at the empty seat where Zero should have been. She had hoped to see him at dinner, but once again, he was not here. So her and her father ate alone…

"I… I'm going to bed Headma-"

"Oh Yuki call me father."

"Er… I'm going to bed father. I'll see you in the morning." She said and gave her father a hug before picking up her half eaten bowl.

"Ok." He sighed heavily and spooned more soup into his mouth. "It's just me now then huh…" he said to himself and Yuki felt a pang of guilt. If she could she'd stay up all night with her father if that meant he would feel better… even if that meant her listening to him worry about this and that.

But she wasn't up to it tonight. The determination that had filled her had left suddenly when she'd entered the kitchen earlier to find only her father was present.

She gave him one last hug and then went to clean her bowl in the separate area where they cleaned and made dinner.

She poured out the rest of her soup and let her bowl sit in the soapy suds of the empty sink. She'd already did dishes when her father was cooking and now she was free to take a shower and go to bed.

Tomorrow was Saturday so she didn't have to wake up early for school and that at least made her happy.

She padded down the end of the hallway where the headmaster's private bathroom dwelled and almost pushed open the door when she heard the shower from inside.

Zero!

The determination that had so soon left her earlier suddenly flooded back into her.

"Zero?" she asked through the door and knocked lightly.

There was no response so she bang the door a little harder and called out his name so he could hear her better, but once again there was no answer.

Was he purposely ignoring her?

"No…" she answered her own question and fear suddenly clutched her heart.

"Zero! Are you alright?"

She waited but all she could hear was the sound of running water.

She cried out and twisted the handle, grateful that it wasn't locked, and shoved open the door.

The warm steam immediately hit her face and she squinted in through the heavy steam. The shower had obviously been running for quite some time.

"Zero!" she called out and hurried into the bathroom as the door closed behind her.

She saw his figure in the shower and gasped.

He was curled up on the shower floor and was completely still, his hands clutching his throat and chest, and eyes closed.

"Oh my… Zero!" she cried and hurried towards him, making sure to not slip on the damp tiles.

She flung open the shower door and grabbed ahold of him under his armpits before dragging him out of the shower.

He was heavy and she soon fell when he was finally out of the steaming water.

"Oh Zero. Zero…" she whispered and turned his face towards her as she leaned over his body.

He didn't open his eyes or make a move and she suddenly grew fearful. Could it be possible that instead of falling to a Level E he would just…

She couldn't think the word. No. He's not dead.

She took a deep breath and then reached towards the pile of discarded clothes before she found the pocket knife he kept in his pants.

She pulled it out and then with an intake of breath she flipped the blade open and dragged it across the flashy palm of her hand and watched as a line of blood formed there in a small little puddle before dripping down towards the tiles below.

Then without hesitation she leaned over Zero again and smothered her blood drenched palm over his cool lips and waited. She watched. Waiting for any sign of movement.

Tears filled her eyes when none came and she let out a gentle sob as her heart sank.

"Zero please… please come back to me… I can't… I can't lose you. I… I…" she trailed off.

It was then that she felt his body shudder next to her and she let out a gasp.

She felt his mouth open up underneath her hand and she cried out in joy.

She lifted his head with her other hand and coaxed him to drink deeper and was suddenly met with a hungry growl from him.

His hand shot up and grasped her hand more firmly against his mouth. She felt him pulling her life into him and tears began to flow down her cheek.

"Drink Zero. As much as you need. Just drink." She spoke softly and his eyes shot open to look at her. His eyes were red and she saw recognition registering in them but she wouldn't allow him to pull away.

"No Zero! Drink from me! I will not let you leave me Zero! I will not let you die!" she yelled at him and then suddenly pulled her hand away, but only to soon pull him to a sitting position so that his face was nuzzled into her neck.

He only resisted slightly but then moaned and ripped open the top of her white uniform top. She gasped as the steamy air suddenly touched the top of her bared breasts but was soon distracted with the pain the pricked at her neck.

Zero had finally latched onto her neck, his fangs sinking in the soft skin there, and then drank deeply from her.

Yuki tipped her neck back to give him more access to the life force that swam through her veins and Zero immediately responded by snaking one arm around her to pull her onto his lap and the other arm to tangle his fingers into her short brown locks.

Yuki moaned softly and tangled her fingers into his silvery wet hair to hold him more firmly to her neck. The other hand gripped his naked shoulders and Zero moaned hungrily as he drank deeper.

She felt the sudden dizziness that always hit her when he drank from her, but this time she welcomed it and relaxed into his arms as he pulled her life into him.

It was a while before he pulled away and Yuki looked up into his eyes sleepily.

Her blood was smeared across his lips and chin and she studied the red scarlet color curiously.

"I've taken too much Yuki…" he spoke her name softly, almost delicately and she noticed his arms no longer gripped her to him but rather held her gently.

His eyes were no longer the deep crimson but rather the soft grey with the slightest hint of violet. And they held such passionate warmth in them that Yuki flushed.

He leaned forward and for a second she was sure he would kiss her, but instead he bent his face to her neck and licked at the two puncture wounds, cleaning them and sealing them of the blood that still gently flowed there.

Once satisfied that it was stopped he leaned back up and untangled his fingers from her hair so that he could wipe at the blood around his mouth.

Her breathing was deep and slow and she still clutched him to her. She had been so afraid she had lost him and she didn't want to let go of him, but eventually he untangled himself from her and gently laid her down on the wet tiles.

He stood up and quickly began to pull on the sweatpants that had lain folded on the counter along with a towel.

Then toweling his hair quickly he leaned over Yuki and lifted her to a sitting position before finally, hooking his arms under her knees, he lifted her up.

"You're wet and getting cold. You're going to catch something." He spoke softly and Yuki nodded tiredly. He had taken a lot from her to get himself safe from whatever had made him collapse and she was now feeling it fully as he held her. He turned to shut of the water and the world began to spin before darkness took hold.

She didn't wake until she felt herself being laid down onto a soft mattress. She opened her eyes to see Zero had carried her back to her room and now he stared down at her with sad eyes.

"You fainted… I should have never let myself get so weak… I should have never taken as much as I did-" his words were stopped when Yuki pressed one shaky finger to his lips.

"Zero… it's ok. I'll be fine. I'm just happy that you're ok."

His eyes grew even sadder at her words and he blew out a shaky breath. She could tell he still hadn't forgiven himself but that would have to wait for later when she could talk to him. Right now she was just so tired. She needed her rest so she could regain her strength.

Her eyes began to droop and Zero nodded his head.

"You need rest." He said and then looked down at her clothed state.

She could feel her clothes and hair were still wet and suddenly shivered at the coldness of it. It was then that she looked down to see her breasts were fully bared to Zero except for the crème colored lace bra. Earlier she remembered him tearing her shirt hungrily to get to her neck and suddenly blushed when she realized Zero was looking at her.

Looking up at him quickly she began to sit up.

"I need to change." She said but then reached out to clutch his arm as the world began to spin again.

"You can't Yuki. You'll just faint again." He said and she was glad to see he wasn't staring at her bared flesh but was rather looking at her undressed state with a look of worry and that made her heart swell.

Where others might have gawked at what was showing of her breasts he was instead looking towards her well-being.

You always cared for me so much Zero.

The thought warmed her heart but then her eyes widened when she realized what he was saying.

"I'm going to undress you Yuki… Is that ok?" he asked her softly and Yuki gulped down the nervous lump in her throat.

"Yes…" she said after a while, and she noticed how weak her voice was. She really was tired, but her thoughts were suddenly elsewhere as Zero began to unbutton the rest of the buttons to her top.

He slid it from her shoulders and she could feel her face turning pink, but she was happy he was only focused on his job. She didn't know if she could handle him staring at her in…

Or him touching her that way and…

She gasped softly at her thoughts and blinked them away before Zero could tell what she was thinking.

Zero reached around her then, almost as if to embrace her and Yuki tried to keep her breathing slow.

His fingers found the clasps that held her crème bra together and with one quick twist unlatched it.

She shivered as the bra fell to join the white top around her waist.

It was only then that she noticed Zero's gaze falter and she blushed even deeper if that was possible.

She looked up into his face to see his eyes trailing down from her face, to her neck, and then to the soft flesh that seemed to respond to his gaze and the cool air immediately.

He blinked and his lips parted and with that small gesture Yuki suddenly felt feelings she hadn't known existed.

"Zero." She whispered his name and was embarrassed to find it sounding raspy and low.

"Yuki… I…" he said and one hand reached towards the soft flesh and the pink knot that was growing firmer each second.

She arched her back towards his hand and he let out a low moan before pulling his hand away quickly.

Her body shuddered at the sudden movement and she felt a loss of his nearness as he took a step back from her.

He shook his head slightly and then sucked in a deep breath before grabbing her hips and pulling her more towards the edge of the bed.

She gasped as the room spun a little and she then felt his hands at the clasp at the top of her skirt. He quickly unhooked it and pulled it down over her thighs and then down her legs so that the wet fabric fell in a heap around the area where her feet dangled over the side of the bed.

She tried not to think of how naked she was right now… more naked than anyone had seen her… than any man had seen her.

Zero also seemed to be keeping himself from those thoughts as he hooked his fingers into the soft cloth of her matching lace undies.

She could have done it herself… but the reckless part of her didn't stop him.

He pulled the slightly soaked fabric from her hips and down her thighs. Instead of letting the fabric join her abandoned skirt he grasped her right ankle and bent her knee so that the leg slipped out of the rest of the undies.

She gasped at the cool air between her legs and Zero growled deeply. She could tell he was fighting himself, and she smiled softly. Even now, while he was doing this, he was trying to just take care of her… even if he wanted to…

Her body flushed at the thought and she blinked. Zero didn't think of her that way. She was just his younger sister figure, and one that he was trying to help get dressed because she was too weak to do it herself and he didn't want her getting sick later.

But that hunger in his eyes… it wasn't for blood.

Her eyes then widened at what she must have looked like to him.

Her back was still slightly arched from earlier and now her legs were slightly spread from where one of his hands grasped her ankle and the other pulled the crème fabric from her body. She knew her shoulders and face were flushed and that the soft smile and droopy lids could have looked very different from what she'd meant them too.

Zero's breath began to grow heavier and she was suddenly shocked when he tossed her last piece of clothing and moved between her legs, pressing himself more firmly against her. She looked up at him and shivered at the dark look in his grey eyes. His hair fell in wet stringy silver over his eyes and his lips were parted again.

"Yuki." He groaned and bent down so that his lips were mere inches from hers.

Her own lips parted and she breathed in his breath that still smelled of her blood.

His hands grasped her shoulder suddenly and she yelped at their firmness, but the sound was lost as his lips suddenly covered her own.

She grew lightheaded at his passionate but slow kiss and she closed her eyes, giving her weight fully to him.

He slowly let her fall back on the bed but his lips never left hers. Instead, he was now leaned over her, both elbows braced on either side of her as he kissed her slowly.

She opened her mouth in a gasp at the pleasure of this simple act and Zero took that moment to enter her mouth with his tongue. She moaned in pleasure as it found hers and the kiss deepened.

I've never kissed by anyone before… and never like this…

Her legs began to wrap around his waist at the same time that her fingers tangled into his wet hair again. But instead of pulling him down to drink her neck more firmly she now pulled him against her lips to kiss her more deeply.

She felt his body shudder at her response and soon one of the hands he'd been using to prop himself up moved to the bare skin at her hips. His fingers trailed up slowly along her sides before finding the mound of soft flesh over her heart.

She arched her back against his touch and a rush of heat suddenly passed over her body. She was cold no longer, but rather beginning to heat up to the point that a slick sheen of sweat was forming on her skin.

He played with the weight of her breasts in his palm before his thumb eventually went to brush against her hardened nipple.

She gasped then and this time Zero pulled away slightly to stare down where his thumb was making her tingle so.

"Mhmm." She moaned and her body began to move slightly against his.

"Yuki... ah.." his words came out in a husky gasp.

"Oooo." She moaned louder when suddenly his lips were around her nipple, and the tongue that had once been playing with her own was now flicking hungrily at the pink mound.

"Ah!" she yelped when his tooth nicked the skin around her nipple, but it wasn't because the sudden prick of pain… it was because of the sudden rush of feeling that trailed down from her shoulder to a place between her thighs.

Zero must have sensed this because he then pressed harder against her and Yuki felt how much she was affecting him through the soft fabric of his sweat pants.

He gripped her hips with both strong hands, and without breaking hold on her nipple, he scooted her farther back on the bed so that his knees were propping him up on the soft covers that pooled around them.

His hands snaked up from her hips to stroke her sides and a shiver swept over her body.

What was happening right now? What were they doing?

Her mind kept asking these questions while another part of her mind was screaming for more of whatever it was they were doing.

Zero… you've always been like a close friend to me. Sometimes even like a brother… what… what are these feelings I can feel from you? What are we doing?

As if having heard her he suddenly froze and released the reddened nipple from his mouth. His eyes widened, as if suddenly realizing how far this had gone.

"I… I…" he stuttered and his startled eyes looked up to find hers too in the same state of shock.

He pulled away from her and this time she didn't shiver from the cool air that touched her body.

He crawled off the bed quickly and turned to face Yuki, who was still in almost the same place he'd left her, except now she was propping herself up on her elbows and gazing back at Zero with wide innocent eyes.

"I'm sorry. I don't know how that happened." he spoke quickly and turned away from her. She saw the slightest hint of a blush creeping up on his face before he turned completely around to face her large wardrobe closet. That wasn't before she noticed the hardened bulge in his sweatpants and she covered her mouth to keep a small surprised squeak from escaping.

Were they about to…

Her mind trailed off then as thoughts tried to fill in the empty blank but she shook her head. She sat up quickly, also ignoring the sudden way the world still tilted and came to sit on the edge of the bed once more, but this time she wrapped her arms around herself to cover her bare breasts.

It wasn't long before Zero came back over to her with a handful of pink cloth that was her nightgown. He avoided her eyes as he ordered her to hold her hands above her and she did as she was told.

He slipped the soft dry fabric over her head until it fell to cover her almost completely. The long sleeves and thick fabric felt suddenly different from her nakedness just mere seconds ago and she quickly pulled the fabric so that it fell farther down here thighs where it had bunched up.

She looked up at him, blinking her large brown eyes, and a pained look crossed over his face.

"Get some sleep Yuki." Zero said. He reached out a hand as if to touch her face but then stopped inches from it. He let out what seemed to be a breath he was holding and then turned and left the room.

Yuki stared after him and then brought up her fingers to touch her still tender lips.

"Zero." She whispered.

-Zero-

"How could I be so stupid?!" He growled to himself. He'd just finished gathering his clothes from the bathroom and cleaning up Yuki's blood that had dripped on the white tiles earlier. Now he stared back at his reflection angrily and clenched the sink till his knuckles turned white.

"Zero." She had whispered his name. He remembered the look in her eyes. So innocent. So kind. She'd given me her blood and then I took advantage of her. She could barely stand! And I was trying to-

He shuddered at his thoughts and quickly ran his hands through his still wet hair. Had she even known what he was doing to her?

The sounds of her moans in pleasure filled his memory and the skin around his neck grew flush at the memory. He gritted his teeth and looked away from the mirror.

She just let him do what he wanted to her. She let him drink her blood almost till she collapsed. She trusted him in taking care of her, but he broke that trust. While he should have been getting her ready to rest he'd been ravaging her naked body. She hadn't even struggled against him she was so weak.

But her responses were not of one who disagreed with what you were doing, Zero.

A voice in the back of his mind whispered to him and Zero yelled at the voice.

"It doesn't matter! I made a mistake. Oh god… Yuki. I… I'm sorry."

He trembled and sunk to the floor, putting his face in his hands. His eyes grew hot with tears but he wouldn't let them fall. It wasn't he who should be crying.

She was the world to him. Her very existence was what made this curse bearable. Without her he would have long succumbed to the urges and fallen to a Level E, and it wasn't just her blood that allowed him to fight it.

She believed in him.

He took in a shaky breath and eventually made himself stand. He was so tired. He'd finished cleaning and now all he wanted was to go back to his room and sleep.

With her. The voice whispered, but Zero ignored it.

He vowed to himself never to take advantage of her like that again. And he was going to be sure to tell her tomorrow, that if he somehow broke his vow and tried to take her like that again, that she would use her charm bracelet against him.

He would take the pain of electricity the charm gave him when touched to his tattoo if that meant she would be safe from him.

For now, though, he had to sleep.

Even with Yuki's blood filling his veins he could still feel the weakness of denying blood for so long. Why had he just collapsed like that? On a normal occasion he would have just lost himself and taken someone's blood, but instead he seemed to almost fall into a deep coma. It wasn't till Yuki forced her blood into him that he was lifted from it.

That was another thing he had to promise himself. He couldn't give up like that. No matter how much he hated taking her blood he had to. It was the only way to really keep her safe. What if he hadn't collapsed? What if instead he'd gone crazy and attacked her the moment she came to check on him? He wouldn't be able to stop himself then from sucking her dry.

He grimaced at the thought of ever coming to that point and knew he had been reckless.

I can't be so selfish next time. What if I had killed her? Or even Headmaster Cross?

He didn't want to think about it and instead left the bathroom to head back to his room.

His room never felt as cozy as Yuki's. He of course preferred staying in this room rather than his other room back in the boy's dorm, but he knew there was one room that felt more warm and welcoming. He couldn't go back to it right now. No. Not while she was sleeping. Not while what had happened just half an hour ago was still so fresh on his mind.

He erased all memories of her naked body from his mind and focused on getting himself ready for bed.

He slipped on a loose sweater and climbed into his cold bed before finally letting his mind relax. He thought he'd be up all night with guilt, but he was more tired than he thought.

It was only minutes before he fell into a dreamless sleep. Only one thing seemed to drift through his mind before complete blackness.

Yuki.