Disclaimer: I don't own anything that belongs to anyone else, including Danny Phantom and Rosario to Vampire.

'Vampire?!'

To say Dan was stunned would be an understatement, unable to bring himself to move as she drained him little by little, he could hear his own heart beating, pumping his blood into her mouth.

Ba- bump. Buh-bump. Ba-bump.

Suck ... suck ... suck...

The moment the vampire girl came out of her stupor she pushed away embarrassed, averting her eyes and clasping her hands in front of her chest.

"You bit me...!"
"I'm sorry, my name is Moka Akashiya," She introduced herself looking a bit sheepish and nervous, "although I look like this, I am a vampire. Did I hurt you?"
"No," he could feel that swelling had already stopped the bleeding so he removed his hand, and he was a fast healer so it would be fine soon, "I'll be okay. Feeling better, you said you're anemic, right?"
"Yes thank you so much for the treat, your blood is soooo yummy."
"Riiiiight."
We ended up walking together, Moka seemed nervous or maybe she's just shy.
Cutely biting her lip she asked "Er ... Um ... so do you hate our kind ... vampires."
"Huh?" How do respond to something like that!? "No, well I've never met one before. If you're a vampire that's fine, I guess."
"That's great! Then if you're okay with me, let's be friends" Her demeanor had become suddenly cheerful,

'So she was afraid I'd hate her...?' He thought
"I was feeling kinda lonely since I don't know anyone here yet."
"Then you're new here too?"
"Yeah."
"Oh ... I'm Daniel Fenton nice to meet you," he scratched the back of his head, "but my friends call me Danny, or Dan if you want."
"It's nice to meet you too, Danny. When the entrance ceremony is over let's hangout some more, 'kay?"
"Sure." Danny smiled watching Moka go to chain up her bike, "A vamp, huh?"
A large sign indicating an assembly hall as 'YŌKAI ACADEMY ENTRANCE CEREMONY' except it was in Japanese so Danny just followed the crowd of freshmen inside. There was a large number of students, over two hundred gathered, but he couldn't spot Moka among them.
"Eh... Ladies and gentlemen, new first year students," began the speaker, "Welcome to Yōkai Academy! Know that this place is a school for monsters protected by a special barrier. Here you will learn how to coexist with the humans. Ladies and gentlemen from today on, please obey the rules... Let's have an enjoyable school life here."
After that was a few more individual instructions: assigning lockers, classrooms, and loafers, shoes weren't allowed inside, seems to be a Japanese thing or something.
Danny ended up in classroom 1 の 3, the teacher was a bespectacled woman with blonde hair with black tips, she introduced herself as Shizuka Nekonome-sensei. Something he quickly picked up on was that she had cat ears and a tail (the tips of which were also black), they moved around according to her mood, as she talked she let out an occasional 'Nyah!' or 'nyan'.
"Our current problem," She had already chalked a basic diagram for her introductory lecture, pointing to it with a telescoping stick, "The Earth has already come under the control of humans! In order to continue to survive, we have no choice but to continue to peacefully coexist with the humans."
'Well, at least they're trying to play nice,' thought Danny, 'I wonder which class Moka is in?'
Miss Nekonome continued, "At this academy you will be studying 'How To Coexist With Humans'! So for that reason, as a school rule you will all live your lives at this academy in human form! Do you understand? It's a matter of being able to disguise yourself well as a human! This is the foundation of coexistence."
'Well,' Danny continuing his internal monologue, 'At least that shouldn't be a problem for me, in this form I am human.'
"You are never to allow any of your fellow students to know your 'true form', understand!?"

'So I can hide my identity as a human by hiding behind my ghost powers, then again come to think of it I'll still have to be careful, Vlad said not to let being a ghost get out.'
"Hey teach!" A brutish looking guy with slicked back hair and too many piercings spoke up, his seat was near Danny's, "wouldn't it be better for us to eat up those puny humans, and in the case of the beautiful girls better to do other things to them?"
What a creep.

"Oh! Incidentally, here at Yōkai Academy, the teachers and students are all monsters, there are no genuine humans here. Since this school is within a secret sacred world. To those who come to know of our existence, we will bring them to death or something…"
'And here I thought she looked sweet and friendly.'

Class was abruptly interrupted by a tardy student,
"Scuse me!" She addressed the teacher, "After the entrance ceremony I kinda got lost in the school … sorry I'm late." She bowed politely.
Miss Nekonome smiled and pointed to an empty desk, "Oh that's fine, just take a seat," then added quietly to herself, "Well, she's a cute one."
The girl was drawing the full attention of the other student.
"Okay!"
The commotion among the male students began escalating.
"Who is she?"
"S-such flowing hair! ... and big eyes!"
"Whoa beautiful! Even if it is just her transformation, there isn't anyone else who could transform into such a pretty girl..."
"Hot! She's too hot!"
"I'm so happy to be in the same class as this girl!"
She passed by Dan's seat, "Moka," he called out,
"Huh," she looked for the one who said her name, her eyes falling on Dan, "Danny?"
"Hey," he smiled and lifted a hand to greet her,
"It's Dannyyyy!" Moka squealed, throwing herself into a hug, "we're in the same class!"
"Uwaah," Dan blushed, his heart racing.
Meanwhile the mood of the room was drastically changing.
"AAAAAH!"
"What's with this guy? What relationship does he have with her!?"
"Our beautiful girl, our beautiful girl."
Saizou Komiya licked his lips while gazing lecherously at the pink haired beauty.

Later, Moka and Dan were walking the halls of their new school, she was pulling him around by the arm. Nearly every student turned their head as they passed by. Spending the first day of school with Moka... Dan hadn't felt this way since this way in a long time. There would be only a couple drawbacks. Moka was oblivious to the attention (adoration) she was getting from the all boys and some of the girls.
"…Wow… hey did you see that girl?"
"Hey look, that girl, no no that girl!"
"Whoa beautiful. I've never seen such a hottie."
"I-I wanna date her!"
Danny could feel the glares of the monsters around them, their bloodlust making the hairs on the back his neck stand up.
"Hey who the hell is that guy next to her?!"
"Perhaps he will leave on his own."
"If not that bastard is dead."
"Let's just kill him now."
Oh, and the other thing, that creep from class blocked their path.
"Hmm, such a pretty one," he looked Moka over and winked at her, "You are called Moka Akashiya are you not? I am your classmate Saizou Komiya. Salutations!" his comeon sounding rehearsed.
The onlooking crowd became suddenly hushed, no doubt waiting to see what would happen next. Saizou grabbing Dan's tie and lifting him off the ground is what happened.
'This feels oddly familiar.'
"By the way, why is a beautiful lady like yourself hanging out with a scrawny twerp like this?"
"!?" Moka when Saizou chucked Danny onto the floor.
"Oof." was his reaction.

"Its Saizou! That guy is Saizou Komiya!"
"He seems like he's one of those ill mannered suspicious rogue monsters.

'No kidding. Sherlock Holmes must go to this school. And what's with the play by play? ' Danny thought.

"He sounds like quite a ladies man, from all the human girls he's molested. They say he caused too many problems out there in human society and was forced into this academy against his will."
Moka tried to reach her friend but the 'flirtatious' bully stepped in front of her, "Wouldn't someone like me be far superior to that sort of scummy guy?" Saizou bragged about himself as if he were somehow good looking, "Why don't we go off somewhere just the two of us and have some fun?" He bent over, getting in Moka's face, the rancid stench of his rotten breath that he likely found appealing, washed over her, "Well? Why don't we go out for a bit."
"Wa?" Moka quickly moved to where Danny had stood up, grabbed his hand and ran, "Sorry! I'm having fun with Danny now!" They ran past the stairs that were behind Saizou and turned a corner.
But Komiya was not the kind of guy to take 'no' for an answer, he just thought it was playing hard to get, "Humph, just me. I, never allow a nice woman like you to escape."
Danny and Moka ran until there weren't any other students around, they leaned on opposite walls to catch their breath.
Moka spoke first, "That was surprising wasn't it, I got a little scared, are you okay Danny?"
"Uh… yeah, I'm good," he decided to more forthright, "So Moka … why are you so friendly to someone like me anyways? Even though I'm a totally average and unpopular loser nerd…"
"Don't say that!" she looked hurt that he would insult himself, "to me you're not a loser or anything Danny!" She clasped her hands around his left one.
"Huh?!"
"Be…Besides …" she was blushing, and cupped her own cheek, embarrassed, "We're on bloodsucking terms." She squealed excitedly at the thought of sucking his blood. Dan's butt hit the floor with a 'thump'. "Be proud of yourself! You have grade A blood, Danny. It's way better than any of the blood I've drank before from the blood transfusion packs. It's full-bodied and the sweetness and mineral balance are all perfect. There's also a tingly feel and an exotic aftertaste that's really unique."
"You make me sound like food," Danny joked, getting up. The unique quality of his blood was from the ectoplasm in his blood cells. Staying dormant, storing energy, then releasing it when he used his powers. When he went ghost his cells inverted, they literally turn themselves inside out, which made his blood red as a human and green as a ghost. Who knows how it would affect a monster.
"Well … actually you know … th-that was my first time..." Moka fidgeted
"Huh?!"
"You're the first person whose body I have ever fed from."
"Oh." Good to know she doesn't go around biting just anybody.
"My first time," she looked at him with those big green eyes, "that feeling … I'll never forget it." There was an awkward silence as her gaze cast downward.
"Moka..." Danny was speechless or didn't know what to say.
She touched a hand to her flushed cheek and playfully shoved him with the other, "Oh, I'm so embarrassed," sending him flying back, cracking the wall and leaving a Dan-shaped impression, "Let's have some fun, let's check out the academy!" Moka headed for a set of doors, pumping her fist into the air.
"Y-yeah, wait up." Dan pulled himself out of the wall and made a note to self to never tick off the supernaturally strong Moka.
The two of went here and there looking around and just hanging out. They saw a naked gargoyle (it was a statue) in a 'Thinker' pose, bought juice from a vending machine that looked possessed to Danny, she got tomato juice he got coffee bean, coffee is a ghost hunter's staple. They got their things and a map and headed outside, Danny was so happy that he nearly forgot his jet lag, but even ghosts need rest.
'It feels just like I'm on a date with Moka, wow am I getting ghost butterflies?'
"Look Danny," they had come to the edge a cemetery filled with the gravestones of students, "This is the school dorm we'll be living in!"
"Dorm?" Moka was walking through the graveyard towards the modern six-story condo beyond it, "Is it me or is this place kinda creepy?" Danny asked when he caught up to her, she had her own opinion.
"So cool," Moka commented admiringly, "such a building full of dignity and character …"
"No way! Where are looking?"
"Oh. You don't like it Danny? Even though you're a monster?"
Dan laughed "I fail to see how being a monster has anything to do with architecture."
"Speaking of which, what kind of monster are you anyways Danny?"
"Sorry that's a secret."
"Oh, right … letting your true form out is against the school rules isn't it? Oops, I'm sorry, I didn't mean to ask that question."
"It's alright, and while we are on the subject, I'm having a hard time thinking of you as a vampire, you're not quite what i imagined." Sam was more like a vampire than Moka, she even had false teeth with fangs.
"...Yes, of course," she stopped walking, "right now I look pretty human but … look." Moka parted the collar of her shirt a little, Dan had to stop himself from staring at her chest, around her neck was a black choker collar with pearl beads connected to it and a silver cross with a red jewel set in the middle hanging from two silver chain links. "Y'see if this rosary on my chest is removed I become the real thing, an evil and scaaaary vampire." Moka smiled nervously and placed her hands behind her back as she continued her explanation, "Rosaries have the effect of sealing off a vampire's power since in my original form I was hated and caused conflict. I put on this rosary so I'd keep my vampiric powers sealed."
'Is she serious!? Even though Moka is so cute, I mean kind and gentle she's had to suffer such hardship like that.' Danny felt really sorry for her.
"Oh, but even if our power is sealed, we do still end up craving blood," she pressed a hand to Dan's chest and grabbed his jacket with the other.
"Huh … um Moka …"
"My weakness, mmmm..." before Dan could finish Moka interrupted and nipped his neck, drawing blood.
"Ahh!" After getting his getting his blood sucked twice in one day Dan started feeling woozy, the jet lag catching up to him, so he politely excused himself and went to his dorm room to sleep.

The next morning Dan followed the crowd to school, but the typically overgrown bully was waiting for him. What was his name again?
"Hey! Wait up lover boy," Oh, right Saizou. Dan remembered because of his size, which he was currently using to his advantage. Saizou grabbed Dan by the neck and swung him into the nearby wall, keeping him pressed up against it, "Looks like you had a lot of fun with Moka Akashiya yesterday and you're gonna pay for it today." By lightly tossing Dan up, he switched his grip to Dan's tie then slammed back into the wall, "Your true form, what is your true form!?"
Danny scoffed at him "Weren't you listening yesterday or did not telling others your true form just echo between your ears?" Danny smirked when the bully started looking pissed, "But, theoretically if I were to say that I'm a vampire..."
That shocked Saizou enough to let him go, but then he went back to being really pissed off, he swung at Danny with his left fist. Dan reflexively dodged, a large part of the wall behind him was smashed to pieces. Danny noticed the power of the punch came from the rotational momentum, at least he would have if he knew what that was. The destruction got the attention of some of the students on the path, they stopped to watch as if kids getting beat up was a spectator sport.
Saizou's right hand grew and hardened, holding it over Dan's head, threatening to crush it.
"Vampire you say?!" Saizou's reaction was making Dan wary, "Vampires are immortal atrocious western monsters! It's even said they're the best of all monsters at using their supernatural powers. Are you such a vampire!? Don't lie to me..." His voice had slowly turned guttural.
"Maybe, I am an American after all." Dan smiled confidently, Saizou walked away, shaking his hand to turn it back to 'normal'.
"Anyway, don't go near Moka again!" Saizou called back at Dan, "if you even talk to her again, I'll kill you!"
Dan slid back against a big slab of rock that came from the wall, "Whatever creep, I just hope I don't get blamed for this." Then Dan got an idea, writing 'Hole in the Wall by Komiya Saizou' like it were a signed work of art. Dan ended up wandering around swatting away the annoying hitodama, wisps that no one else seemed to notice. Until Moka ran up and hugged him from behind, saying in a chipper voice, "Mornin'! If we don't hurry we're gonna be tardy…" she noticed his depressed face "something wrong?"
"I was just thinking."
"'Bout what?"
"Do I really belong here?" he asked looking to sky in contemplation and ... longing, " Maybe I should go back home to the States."
"What," moka gasped, "Why would you want to leave?"
"Because, I think I would be better off at a human school." Danny sighed, "I might've gotten picked on and I won't have any friends but I think I would fit in better there."

'And also to fulfill my obligation to protect my hometown from ghosts.'
"A human one...?" Moka whispered, she grabbed Danny by the shoulder, "No way!"
"Moka what's wrong?"
"You can't go off to some human school," she nearly screamed, "I hate those humans!"
"Huh?"
"You know … I …" Moka pulled her hand away, "I actually went to a human school up through middle school. I was isolated … none of those humans believed in monsters so I started thinking I was weird. That I was different, that it'd be better if I wasn't there. That it'd be better if I disappeared. It was so tough... But… you said I was alright even though you found out that I'm a vampire and so... This has been the first time in my life that I haven't felt alone! You can't go Danny... ! Let's study hard at this academy together."
"If..." Dan didn't even know what to feel other than dejection, ''if I was one of those humans that you hate, would you still want to be friends?''

"Don't be ridiculous no human could be here."

"Moka, I am human."
"What? How could … why?" Moka was mortified.
"Doesn't matter," Danny turned to leave, "you should get to class."
"Danny, wait..."
"Please tell the teacher I'm not feeling well, I just want to be alone for a while."

Moka was confused and not succeeding at holding back her tears, so she kicked a rock around, taking out her feelings on a lump of earth.
"No way ... No. It's not fair, *sniff* even though it was the first time in my life I thought I had a friend...
"Hey, why is you are alone?" a voice came from behind, someone taking her wrist in a vice grip and grabbing her around the waist.
"Saizou!" Moka gasped seeing the delinquent over her shoulder.
"Someone like you shouldn't be lonely when you can be with a man like me..."

Saizou licking his lips while looking her over. He ran the hand around her waist down her backside until he reached her thigh.
"Stop!" Moka pulling away, she tried to run but he still held her by the wrist and was thrown into a gravestone, "Kyaa!"
"Mwaha... I am serious," Saizou tossed his blazer away, "you're way hotter than any of those puny humans I have molested! I want you in all seriousness Moka Akashiya!"
"Sai... Saizou?" Moka tried to back away as her attacker's body began to change but she backed herself into a tree.
"...Arrgh ohh I can't stop myself when I feel like this, my body starts to ache. When I come to this point, there is no stopping me ...I just can't stay in human form anymore."
"N-no someone, help..." Moka screamed as Saizou's entire body doubled in size, "DAANNYYY!"
"Ha ha ha hah," Saizou laughed while his shirt ripped to shreds, "I'm going to enjoy this little violation of the school rules."
Saizou had Moka pinned down with one enormous hand. She couldn't even take a breath to scream, all she could do was whimper pathetically. His true form was hideous, his skin had become rough, hardening in some places into an exoskeleton where bone jutted out as plates and spikes giving him natural armor.

Danny just walked and walked after he left Moka, going along the cliffs. His past girlfriends, Valerie had liked Fenton, Paulina had liked Phantom even if she had been overshadowed the whole time they were together, was it too much asked for someone to accept both? Sam ... and Tucker had, they were always his best friends. He had hoped Moka would be the same, was it too early to drop a bomb like that? He ended back near the school, having decided that he would stay, that was when he had heard her scream.
"Moka." Like that Dan was off, running through the woods, it took him a minute to find her, a light fog was limiting visibility.

Moka was lying against a narly tree, an oversized akaname hybrid looming over her from a couple meters away.
"Ku ku ku, you taste good," Saizou's face twisted into a sickening grin as his tongue, which grown until it was longer than one of her arms, snaked its way across Moka's cheek, the rest of her was already covered in his disgusting slimy saliva.
'Nobody's coming,' Moka thought terrified, 'I hurt the only friend I ever had, Danny I'm so sorry.'
"Moka!"

"Danny!"

Danny emerged from the foggy woods ran up to Moka, yet failed to notice Saizou. There were a lot of creepy looking trees on the way here so we can't really blame him. He only had time to dodge because the rogue roared as he smashed his fist into ground where Danny had stood a moment ago. Saizou opened his gigantic fist and swatted Danny away, whom had no time and nowhere to dodge.

Danny was out of it, the wind completely knocked out of him, his head smashed into a headstone, and a few broken ribs.

"Did you think I wouldn't attack a so called vampire?" Jeered the filthlicking monstrel.

"I hoped not." Danny coughed

Moka rushed over to Dan, "I'm so sorry, this is because of me."
He tried getting up, but he stumbled and bumped into Moka, recovering immediately he stalked towards Saizou, starting to circle the bully. Dan's fists started glowing from within, swinging his right fist he knocked a tombstone shaped like a cross at Saizou. Who caught and pulverized it with one hand before it could collide with his face, Dan had imbued it with some energy so Saizou's grip strength had to be considerable.

Then it happened, an explosion of light and intense pressure, as if the air had become heavy and charged with massive amounts of energy. The likes of which Danny had rarely felt from ghosts which had given him pause, now he felt paralyzed. A single action had caused this, Danny looked down at the silver cross in his left hand.

Her rosary had been removed.

Moka's physical appearance and presence suddenly changed, her hair turned silver, her pupils became slitted, the irises turning bright red and a pair of fangs jutted over her bottom lip. Fierce, beautiful, and powerful like a majestic beast you know could kill you in a second. The collar of her shirt stood up right and rigid.

She taunted the rogue monster and he charged forward, in a second his open hand slammed into her body, but the vampire didn't so much as blink. A single kick sent him crashing through trees and rocks.

"Knoweth thy place!"

She stalked towards Dan his instincts told him to flee, he got up taking a step back then stopped and just stood there holding a silver cross.

"What's wrong? Are you frightened? Of this me... Don't get so worried, this me who has not awoken from slumber for a long time is still tired. I have no intention of harming you, as your blood is very delicious to my sleeping self."

'... Dual personalities! Up close this Moka is still just as scary, but she looks even more beautiful smiling at me. Even though she looks thirsty for blood.'

"Until we again, you had better babysit the sentimental other Moka." She fix the rosary back on its chain, instantly returning to outer Moka. She collapsed into his arms

He carried her in one arm like a baby and dragged the unconscious Saizou, took them both to the infirmary.

"What have I gotten myself into?" He dumped Saizou outside, set Moka down on a bed, then went to find a nurse.

The next morning she was already feeling better, Danny was talking into a small ball of light using it to send a message to the real world via ghost, being a former messenger boy makes it all too happy to help. That was when she jumped on his back, interrupting his farewell, "Morning, whatcha doin' Danny?"

"Ah, nothing. here do want a ride to school?" He asked bending down a little and offering his arms for her legs.

"Ooh, can I?" She jumped up a little to get in position for a piggyback ride, "oh my, whenever I'm with you my heart beats so hard, and I wanna suck your blood."

Closing her eyes, Moka bit into his neck allowing his pulse to pump warm fluid into her mouth, that tingled as it flowed down her throat, the taste on her tongue was one of the most amazing things she glad ever experienced. After a pint had been drained a flick on her forehead interrupted her meal.

"Hey, haven't you had enough yet?"

"Sorry, was that too much?"

"I should be okay, you passed out yesterday, I thought you might need a pick me up, but we're here."

"Oh," she hopped off his back, "Danny thank you."

"As long you're alright. But that was a one time freebie."

"Danny..."

"Since you are feeling so chipper we should hurry to class, or we'll be late again."

He couldn't tell her everything, like what he really was, or why he was here, even he didn't know that one.

He had told her he was actually half human he didn't say anything about ghosts, not yet.

It wasn't too long after this that things started getting really complicated for our ghostly hero, when he met her.

Another day another walk to school, the male students had already heard about Moka and would gather round to the "#1 bishojo of Yōkai" to admire her dazzling 'light'. Dan greeted her instantly stirring jealous protest from the admirers when she hugged him and took his arm in hers. However one onlooker wasn't jealous of the foreigner...