Hello everyone. I hope you like this story. Well, these stories. I will be posting three different variations of this story, all using the same OC but with a different Rider series. I have been given a challenge by Storylover213, and the challenge included choosing between OOO, W and Dark Kiva. As you can se, I can not decide. I will put up till the battle with Kadoya and have it as a side project for occasions. However, the one I continue depends on which one you favourite/ alert the most/ has the most reviews/ PM's sent about it. So, in the end, all your decision!

I would put up a poll about it but since I do not know when I will put up the next chapter, I will not have one because I will look at which one has the most next time I go to look at them.

I can not speak, nor do I talk, Japanese. This means that the characters will be talking completely in English, no Japanese phrases. It also means no '–Kun's, '-Chan's or '-San's, mostly because I do not understand when, and why, they are used. So characters will just call people by their name. Sorry if this turns you off the story, I am limited in my knowledge.

Enjoy!

Disclaimer: I do not own Kamen Rider or Rosario+Vampire.

"Speaking"

'Thinking/phone'

"HENSHIN!"

"Kivat"

"KIVAT USING FUESTLE!"

Flashback

Kamen Rider/ Rosario+Vampire Crossover

Rosario Dark Kiva

Chapter 1: The Fangire King has Arrived

The immediate area looked to be desolate and barren. The only kind of vegetation around was the scraggly trees and some moss that grew on them. The sky was murky and foreboding, offering no comfort. The most terrifying thing in the scenery was the almost obscene amount of tombstones that were littering the grounds. Of course, that meant little to the young man who was walking through this scenery.

The young man was 16. This was James Johnson. He had black hair and red eyes. His shirt was dark grey and he was wearing a black trench coat. On his left hand was a single red glove with a gold chain around the wrist. He was wearing black jeans and boots. Around his neck was a necklace with a strange symbol on it that looked like a green bat. On his left hip was a small black chain that led to a decoration that looked like a sword.

"Watch out!" he heard a voice yell, catching him by surprise. He turned to see a girl coming towards him on a bicycle and he didn't even get the chance for his eyes to widen before he was hit with the bike "Ow…" the girl groaned and then she found herself lying on top of the young man. Shaking the stars out of her head, she managed to get back up onto her knees. Looking to see who she hit, she saw James lying on his back. "Sorry." He remained silent "Is something wrong?"

"Oh, yea. I'm fine, don't worry about it." James smiled with a slight blush on his face as he sat up and couldn't help but to stare at the girl. She was just so beautiful. She had lovely pink hair, which was so unique, and green eyes that seemed to be like emeralds and glow like small green stars. "You just caught me by surprise, that's all." Suddenly, he felt her hands on his face 'What is she doing?'

"You smell nice…" she said huskily. She slowly leaned towards him and then… she bit his neck! He couldn't stop the moan that left his mouth. It also seemed like his moan broke the girl out of her spell because she was about to pull away but James didn't let her. His canines became sharper and seemed to turn to glass before he bit into her neck as well. She gasped into his neck before moaning and continuing her drink, as he did his. When they eventually pulled away she was blushing bright red and James sighed "I'm sorry. I was just so hungry. Oh, I forgot to introduce myself." She stood up and said "My name is Moka Akashiya. What's yours?" she then looked in his eyes and gasped. Now it was her turn to blush. "Wow, you're cute." she said bluntly.

"James." he finally said with a slight smirk. Time for the King to shine "James Johnson."

"Hello, James." Moka smiled.

After both got back up to their feet, James and Moka began walking towards their destination again. Nervously looking at the beautiful girl beside him, James noticed that she was wearing a female school uniform "Moka?" he asked

"Yes?" Moka smiled.

"Are you going to Yokai Academy too?"

"Yes!" Moka smiled. "Are you a new student there too?" James nodded

"That's great!" Moka cheered. "Do you want to be friends? I really don't know anyone here and it's a little intimidating to be by myself."

"Sure." James smirked

"Yay!" Moka cheered as she hugged James's arm. The young man blushed like a tomato at the closeness and the feeling of her chest against his arm "Thank you, James! I'm so relieved! But…"

"Eh?" wondered James. Moka seemed to be so down all of a sudden. Being depressed didn't really suit her face.

"I guess you know I'm a vampire already." Moka admitted. "Do you…like vampires?"

"It would be a bit strange if I hated vampires, I mean our species are almost identical." James smirked

"What do you mean?" Moka asked

"I am the King of the Fangire's." James said simply "We are s more powerful and advanced form of vampire. That's also why I'm not wearing the uniform; royalty gets to dress as they want."

"Amazing!" Moka said as James just smiled before they began to walk towards the Academy

(Later)

James had lost Moka during the entrance ceremony, but he got over it. Finding his classroom was very easy. It was quiet. No one really went out of their way to talk to him. That was fine by the young man, anyway. Entering his classroom, he picked out a desk and sat down quietly. As more and more students filed in, an older woman wearing bright clothes and glasses entered the room with a wave. She was a pretty woman with short blonde hair and what looked like cat ears on her head. Waving lazily behind her, a yellow-furred tail was connected to her. "Welcome, everyone, to Yokai Academy!" she cheered, bringing equal cheers from the students on the classroom. "I'll be your homeroom teacher, Miss Shizuka Nekonome! Now, as I'm sure you're all aware…" Ms. Nekonome continued, drawing a pointer "… This school is a school for monsters! So, like it or not, humans run the world! That means we monsters have to learn to co-exist with them. That is the mission of this school! Peaceful co-existence with the humans! That brings us to rule number one!" the catty teacher continued. "You will remain your human appearance at all times! Does everyone understand this?" Ms. Nekonome asked seriously "This is our first key of survival among the humans. To practice the art of disguise, please do not reveal your true nature, even to your fellow students."

"But can't we just eat all of the humans ma'am?" asked one of the students. He had long brown hair that reached his neck and some piercings on his face. "I could start with all the cute girls."

"Say that again." James growled

"What was that?!" Saizou said as he got up and span around, glaring at James

"It's punks like you who are making it so we have to hide. That my kind is being killed." James growled, grabbing the sword decoration on his side as stain-glass markings, almost like tribal markings, appeared on his face "And I don't like my kind being killed.

"Don't be silly Saizou!" Ms. Nekonome suddenly giggled, seemingly not noticing the interaction between James and Saizou "You don't have to worry about humans here though. All the faculty and fellow students are monsters just like you. This school exists behind a special barrier so no humans have ever seen it. Well, seen it and lived."

A sudden sliding sound that went with the opening of the door suddenly sounded off. It cut off the rather grim conversation "I'm sorry!" a familiar voice to James apologized "I got lost in the halls after the welcoming ceremony…and…sorry I'm late!"

"That's okay." Ms. Nekonome smiled reassuringly "Just take an empty seat anywhere."

Stepping into the classroom, James immediately recognized the beautiful Moka Akashiya. He blushed again while all the male students in the room began to gape at her beauty. The way she walked down the aisles of desks made her look almost like a model walking down the catwalk, even if she had no idea that she was doing it. She certainly had the face and figure for such an occupation if she wanted one.

"W… Who is that?" one boy gasped.

"The silky hair, the beautiful eyes…" added another.

"That can't be a disguise!" a third gasped. "She's too… too…"

"BEAUTIFUL!" the general male populous of the room cheered.

Moka seemed to be a little surprised at how the entire classroom seemed to be reacting to her entry. It didn't even occur to her that she was rally that beautiful "Shut up you perverts!" James snapped, getting the classes attention "She is not a piece of meat!"

"James!" Moka suddenly cheered happily. Lunging forward, she wrapped her arms around the young man, making nearly fall out of his chair from the sudden force of the girl jumping into his arms "We're in the same classroom! Isn't it great?" James was too busy glaring at the class to really answer. As the reunion was going on, the other students in the room were making their own comments.

"Huh? Who is that guy?"

"How does he rate a hug from her?"

"How does a weirdo like that know her?"

Obviously the males in the room weren't happy at how Moka was being so friendly with James. Saizou was also giving Moka a lecherous look as well. He'd just found his target. The guy was of no consequence and would be collateral damage anyway.

(Later)

When class had ended, Moka had immediately wanted to explore Yokai Academy. Not having much else to do, and being too shy to turn Moka down, James had become her exploring buddy. Most of the time had been the poor boy getting dragged around by the excitable vampire. "Wow!" she smiled. "The main halls are so clean! Neat!"

"Seen better." James smiled, thinking about his home

While Moka was taking in all the sights in the school with sparkling eyes and happy smile, James had noticed the people around them. Males were all stopping and staring at Moka as she went past them. It was obvious that they were lusting after her from the way they stared at her.

"W… Whoa."

"What a babe!"

"I've gotta date her!"

"Who's the guy with her?"

"Who cares?"

"If he gets in my way, he's dinner!"

"How do you like Yokai Academy so far, James?" Moka asked as they stopped by a vending machine, breaking James out of any train of thought he had, which included skewering all the people who looked at Moka like that. She got herself a can of tomato juice while he got some nice and cold Pepsi.

"Oh? It's been great." he said simply

"That's good." Moka smiled. "I think we're both going to have a lot of fun here. Don't you think so?"

"Could be." James nodded. Smiling, James and Moka headed out to explore even more of the school. James was amazed at how much energy Moka had. Walking along the school hallways again, Moka and James were subjugated to the lustful/hateful stares of the males in the general vicinity. Moka was again oblivious to the looks, but James was all too aware of who they were aimed at and returned the hateful looks with ones that could possibly mentally scar someone if applied for too long. Turning a corner, the pair of new friends were suddenly cut off by a taller student; one who James could remember had a taste for humans.

"Hey, babe." Saizou said as he leaned against the wall with his arms crossed and looking at Moka. James quickly held in a laugh. It was like this kid was trying to act like a Bad Boy. Key words 'trying' and 'act' "Moka Akashiya, right? Man, looks like I'm not the only one who thinks you're cute."

"Um… thanks..." Moka nodded. "Who are you?"

"Ah, the name's Saizou." the boy introduced with a grin. "I'm one of your classmates."

"Oh… um…" Moka nodded. "Good to meet you…I suppose."

"I'm sure. Hey babe, why do you hang out with this loser? Why not with a real man?" he asked. Moka didn't answer. "Hey. C'mon. Tell me. Why go with this wimp huh?" He asked again

"Because he's my friend!" she said.

"C'mon. You won't regret it you know." he said

"Look, Saizou. If women says no it means no. Rejection hurts but hey, that how life works." James said with a powerful glair

"Oh, and what are you going to do about it?" Saizou countered

"If you attack me I'll kick your ass, you keep harassing Moka I'll kill you and if you try to hurt another person I will have you begging for death." James said with a glare so powerful that Saizou unconsciously backed into a wall "Let's go Moka." James said, taking her hand and walking away

(On the roof)

"Whew!" Moka sighed in relief. "That was amazing James!"

"Thanks" James nodded "No one messes with my friends."

"But we're both okay thanks to you." Moka smiled. "Thank you!"

"No problem."

(Later)

James and Moka had finally exited the school and were heading up to the dorms. James lived off campus, but Moka still wanted to explore. At the moment, they were walking up another path that was littered with creepy trees, tombstones, and old bones. To help pass the time, Moka began asking James about himself. "James, before you came to Yokai Academy, did you go to school in the human world?" Moka asked. Since James acted more like a human than a monster, she assumed he had lived in the human world at some point

"Yes, I did." he told her "My entire species lives in hiding inside the human world."

"Human schools are the worst, aren't they?" Moka asked James. "I used to go to school in the human world up until now but the other students thought I was weird so I never made any friends." That's why I hate humans!" Moka confessed

"Moka, do you really hate humans?" James asked carefully

"What's wrong?" she asked

"As I said I am the Fangire King." James explained "Not all humans are bad. I'm here to learn how to hide in plain site, how my kind can live peacefully with humans. You saw childish teasing, there's worse in the world and not all humans are like that. I want you to think about this, I'm going home to bed. See ya." And with that he walked away.

(With Moka)

Moka was walking sadly in the forest, thinking about what James said. She'd always hated humans since the way she was treated, but now because of the points James told her she was reconsidering her opinions. She heard rustling behind and spun around, hoping it was who she thought it was "James!"

"Sorry, babe." Saizou said with a feral grin on his face as he walked lout of the bushes "It's just you and me now, alone."

James walked through the forest back towards home when, suddenly, he heard a shrill scream. James's eyes snapped wide open. "Moka!"

Saizou had assumed his true form, an ogre, and he looked hungry in more ways than one. He was a hulking creature with thick veins and bumps running over his skin. His teeth were razor sharp and his tongue was longer than before. In all, he looked like the real definition of a monster. "Don't worry babe," said Saizou sleazily. "You'll enjoy it." A rock hit his head and he turned annoyed, to look at who'd thrown it. It was that freaky kid again.

"Get away from Moka!" James demanded.

"Scram, kid!" Saizou shouted at James.

"James!" Moka exclaimed.

"You're trying to hurt Moka." said James angrily. His eyes took on a different light now and his markings reappearing "I can't forgive you."

"Oh yeah? And what're you going to do to stop me?" sneered Saizou.

"I'll take you down!" shouted James

"Really?" Saizou said in an amused voice "Who do you think you are to do that?"

"The King of Fangire's." James said coldly before he held his gloved hand to the sky and yelled "KIVAT!"

"Let's go." A black mechanical-looking-bat covered in red markings all over its boy, yellow eyes and a green triangle gem on its forehead. James caught the bat and held him to his non-gloved hand "Bite!" the bat said as he bit into James hand, causing energy veins to appear and black chains to wrap around his waist. The chains seemed to melt and reform into a strange black belt with a perch at the top

"HENSHIN!" James yelled before attaching the bat, upside down, onto the perch on his belt. A high-pitched sound was then produced as James' body was covered in green tinted liquid silver. The liquid then reshaped before shattering off his body like glass. His legs where now is in dark metallic crimson boots with silver lining that had blades on the back of the ankles, his torso armour was also the same shade of dark metallic crimson with a black chest plate resembling several pairs of bat wings with three green gems running down the centre, he also gained gauntlets the same colour as his torso and leg armour. His head was covered with a red helmet with the visor shaped like a pair of green bat wings edged in black, in-between the top points of the wings was a black ornament resembling a bat and two black bat wings came out behind the eyes of the helmet. The mouth guard was dark grey and framed by black fangs. His shoulder armour was spiked and in the same dark metallic crimson as the rest of his armour. After a second he made a wave of his left arm causing black flames to burst from his back and became a midnight black cape. "Kamen Rider Dark Kiva." The newly transformed Rider said before he charged

(TETRA FANG - Roots of the King)

Saizou was surprised by the sudden change and Kiva tackled into him. They both tumbled along the ground as Moka watched. "James!" she cried and she ran to follow the fight.

While Saizou was powerful in his true form, Kiva wasn't exactly a pushover either. He was able to dodge all of Saizou's punches before retaliating with punches of his own that forced Saizou backwards. He then used a snap kick to hit Saizou between the legs before grabbing the ogre's hair and pulling his head down into his knee. Saizou was sent reeling. "Had enough?" Kiva mocked

"Die!" Saizou said as he got back up before he charged and began to swing wildly. Kiva just dodged each swing, easily twisting his body slightly. It was clear he wasn't even trying, he even pretended to yawn

"James!" Moka cried when she arrived at the area, seeing her friend under assault and Kiva was momentarily distracted. Saizou took advantage of this and charged at Kiva before slashing him across the chest, sending sparks flying. Kiva cried out in pain and was sent flying by a brutal haymaker that sent him skidding along the ground and into a tree. He crashed violently and Moka kneeled next to him to check him for injuries but it was hard to tell with that armour of his.

"James? Are you alright?" she asked

"Fine, now get away. I can't focus if I'm worried about you!" he growled

"Aw, how sweet." said Saizou mockingly "Looks like I have to kill you both. What a waste though. I wanted to have one go at Moka before I had to kill her."

"Like hell you will!" Kiva growled as he stood up, accidentally grabbing Moka's Rosario and taking it off in the process "Ooops." While he couldn't see what was happening to Moka very well, he could sure sense it. That well of power she had within her that Kiva had felt was being restricted was now breaking loose. The inhuman power was moving like a river through her entire body. As his eyes began to get accustomed to the light, he saw that the sheer amount of power was making Moka's physical appearance change as well. Her pink hair was turning silver right before his eyes. Her skin seemed to become paler as the power continued to flow. The nails on her fingers became slightly pointed, looking like they could cut things. Her fangs became more pronounced while her eyes turned crimson the pupils where now slits. Not just that, she also grew slightly taller and her body adjusted to be perfect for her height as well as the most attractive she could be. Kiva could only stare at Moka after her transformation. She looked radically different, almost like a different person. She looked…more sensual, than before. She exuded a kind of sexuality that would make men drop to their knees, but Kiva could feel the danger which was underneath it. This girl was dangerous! 'Perfect attributes for a Queen.' Kiva thought absentmindedly

"Impossible! Those crimson eyes, that silver hair and the incredible demonic aura!" shouted Saizou. "She's an S-Class monster! A true vampire!"

"Truly impressive." she purred as she looked Kiva over "I did not expect a King to be here, especially the Fangire's King. And in such impressive armour too." Kiva remained silent before he turned to look at Saizou. The ogre was shocked at seeing the new Moka, but his courage was returning. He was clenching his fists as he readied himself to execute another attack. Seeing this, Kiva stepped forward and took a fighting stance. Chuckling softly, Moka stepped beside her armoured friend. "Chivalry noted, but I am not some china glass statue." she smirked "I can take this low class nobody myself."

"I'm going to make you my bitch, Vampire!" Saizou yelled

"We shall see." Moka smirked. Saizou swung his fist at Moka who caught it in her hand. Saizou's eyes widened in surprise as she turned on her heels and threw him over her shoulder and through several trees.

"Impressive yourself." Smirked Kiva

Moka proclaimed "You dare to lay your hand on me?"

"I don't give a damn if you're a fucking vampire, whore! I'll kill you!" Saizou roared.

"I doubt it." Kiva said as he pulled out a small yellow Fuestle and inserted it into Kivat's mouth and tapped his chin twice

"WAKE UP 2!" the bat yelled as day turned to night, the moon behind them and glowing red with Dark Kiva's symbol glowing brightly. Inner-Moka gasped as she felt more energy fill her body

"Let's go." Kiva said before he jumped into the air. Two energy fangs grew at the sides of his legs as he began to fall, Inner-Moka following him by jumping in the air as well

"Know your place!" Inner-Moka said fiercely

The two then slammed into Saizou and smashed him with their kicks making him fall to the floor, face first. "The King has passed judgment; Death!" Dark Kiva said simply as blood flowed from under Saizou's body

(End song)

Both Kiva and Inner-Moka landed on their feet as Inner-Moka turned to regard Kiva. With the immediate crisis dealt with, Kiva was able to look at his transformed friend. She was even more beautiful now than when she was wearing her Rosario. Where the other Inner-Moka was gentle and cute, Moka was Dangerous and sensual. Inner-Moka picked up the Rosario that lay on the ground and stood up to Kiva. Her presence was intimidating to say the least but Kiva didn't find himself afraid, which see seemed to tell and smiled slightly in a slightly sinister way

"You're an interesting one, James Johnson." said Inner-Moka. "Or, do you go by a different name in this form?"

"It's Kiva. Kamen Rider Dark Kiva" Kiva said to her.

"Kiva? What is that exactly? I know you're a Fangire but what is this power? Why is it needed?"

"It is the true power of the Fangire King." Kiva answered simply.

"Hmm, very well." Inner-Moka nodded. "Just be sure to watch over my other side while I sleep. I can't be out here all the time."

With a single motion, the Rosario was attached back onto the chain the Moka's wore. In a flash of light, Moka's power was brought back into her body. Her eyes drooped shut as they returned to their original shade. Her hair likewise returned to its pink shade. Stumbling forward, Kiva caught her in his arms. As he managed to her steady, he then removed the Driver from his waist and released the armour. His body turned silver before returning back to normal with the armour seemingly shattering off his body.

"Moka?" he called. "Wake up, Moka." Moka's eyes fluttered open. "Thank goodness you're…"

"JAMES!" Moka cried out loudly as she hugged him tight, surprising him. "You're okay!"

"It'll take more then that to take down the King." James smirked

I hope you liked this. Review!