Hello everybody, TravyMcNavy184 here with another story. This is a crossover story for Rosario+Vampire and Blue Exorcist that has been floating around in my head for some time and I wanted to give it a try while i work on my Bloodrayne fanfic. As mentioned before, I am still new to writing fanfiction so when you review, please don't be too harsh, but do tell me what I can do to improve or add to make the story more enjoyable. I will also any and all questions some of you will have to the best of my ability. As far as romance goes in the story, I decided to Rin pair with Kurumu. I may add more girls to Rin's harem if I deem it necessary, but RinxKurumu is a definite. As usual I own nothing except the OCs, everything else belongs to their respective creators. So without further ado, Here is The Son of Satan in Yokai Academy.

The Son of Satan in Yokai Academy

Prologue

It was a bright, warm day in the fall. The cherry blossoms were being led by the breeze of the wind, a lone yellow school bus was driving down the road. On the bus were two occupants; one was the driver and the other was a boy of about 16 years of age with messy, dark blue hair, pale skin and intense blue eyes. The boy also had slightly pointed ears. He was wearing an open green blazer with a white dress shirt and a red tie that was loosened, brown cargo pants with a black belt and black sneakers. A red sword sleeve, which housed a beautiful ornate katana with a unique guard and sheathed in a blue scabbard, sat at his side. This boy was Rin Okumura; elder fraternal twin brother of Yukio Ukumura and former student of True Cross Academy and exorcist in training. This boy is also the son of Satan, the ruler of the realm of the demons known as Gehenna. Now you are probably wondering, what is the son of Satan and an exorcist in training doing on this school bus? Well we have to go back a bit.

"WHAT!? YOU"RE MAKING ME TRANSFER SCHOOLS." Shouted Rin at the man in front of him as he slammed his hands on the desk.

The man was a tall man with dark purple hair and forest green eyes. He was wearing an elegant white suit with a with top hat with pink and purple around the base, purple gloves, a pink tie with white dots, with jester style pants and pointed shoes, giving him the appearance of a clown. This man was Mephisto Pheles, the headmaster of True Cross Academy. In the room with them is a young man dressed in a long black exorcist's jacket with teal eyes and dark brown hair with two moles under his left eye and another under the right side of his mouth. This boy was Yukio Okumura, another of the sons of Satan, Rin's younger fraternal twin brother, and a teacher at the the True Cross Academy as well as a licensed exorcist. The situation at hand is that Rin had just defeated Amaimon, another child of Satan, also known as King of Earth. While Rin defeated a powerful demon, it was also revealed that Rin himself is a spawn of Satan since he revealed his demon nature as well as his blue flames. Because of this revelation, his friends have begun to fear him, thinking he is just like his father. Because of this, Mephisto and Yukio have decided that Rin is too dangerous to be around the human students and have decided to send him away.

"I'm afraid so Mr. Okumura, fact of the matter is you are just too dangerous to be around all the other students and so we have come to the decision to send you to another school." Mephisto said in a rather cool and laid back manner. "But the good news is the school you will be attending is a school exclusively for monsters. I happen to be good friends with the headmaster there and he has allowed you to attend his institute."

"I don't care about this stupid school, what do you mean I'm too dangerous to be around everyone? Yukio, come on back me up here." He turned to his brother hoping he would help him out, but he just looked away from Rin.

"Yukio. Yukio, SAY SOMETHING DAMMIT!" He shouted at his brother while grabbing the hem of his coat.

"Get..Your hands...Off of me Rin." He said in a calm manner, shocking Rin straight to his core.

"Yukio...Why?"

"As Sir Pheles said before, you are too dangerous Rin. Look, the secret is out that you're the son of Satan, everyone is afraid of you now. Look Rin, were doing this for your sake as well as the others. There's just no other alternative other than turning you over to the Vatican for execution."

"Exactamundo my boy. This is best for everyone."

Rin was silent for a few moments. His hair overshadowing his eyes while he gritted his teeth, exposing the sharp, elongated canines of his teeth. Rin has had his share of prejudice before and after he became a demon. Whether it was in elementary school or now in high school, he just could never escape all the hateful stares people shot him or the the horrible things they said about him. And now his friends and even his own brother had turned their backs on him. Never in his life had he felt more betrayed.

"So that's it huh? You want to leave so badly, fine then. I'll go back to the room and start packing." Rin said in a calm manner, but with a hint of hurt and anger in his voice. He turned around and headed for the door. Yukio tried to stop his brother. "Rin, look-" Before he could finish and put his hand on Rin's shoulder, Rin grabbed Yukio's wrist at blinding speed and tightened his grip, causing Yukio pain. "Yukio, if you so much as touch me, I swear to god I will really show you and everyone else at this stupid school something to be afraid of." He said in a cold, dark voice, sending shivers down his spine. He threw Yukio's hand away and he proceeded out the door, slamming it on his way out.

Present Time

Back to the present, Rin was riding the bus to his new school, looking out the window admiring the scenery of the city. The bus then began to slow down at another stop, where a boy wearing the same uniform as Rin was waiting for the bus. This boy was light skinned boy of the same age with black hair and brown eyes. He was wearing a school uniform, which consists of a green blazer, a white dress shirt with a red tie, brown cargo pants with a black belt, and white sneakers. Once the bus came to a stop, the driver opened the door and the other boy stepped inside. He noticed another person on the bus and went towards him. "Hi there, anybody sitting here?" He asked pointing to the seat next to him.

"Nope, knock yourself out." Rin answered the other boy. 'Hmmmmm. Judging from the scent he's giving off, he's definitely a human. But what is a human doing going to a school for monsters?' Rin thought.

"Thanks a bunch." The boy gratefully acknowledged and took a seat. "By the way, my name is Tsukune. Tsukune Aono." The now named Tsukune introduced himself and extended his hand.

Rin smiled softly and took Tsukune's hand in a handshake. "Name's Rin Okumura. Nice to meet ya."

"So are you going to Yokai Academy too?"

"Sure am, just started today. I went to another school before coming here though."

"Oh yeah? Which school if I may ask?"

"True Cross Academy."

It was then that Tsukune went wide eyed in surprise at Rin's answer. "True Cross Academy! No way! That is one of the best private schools in Japan. But why are you going to Yokai Academy?" Tsukune asked.

"Let's just say it didn't work out." Rin answered with a hint of hurt in his voice.

"Oh, I'm sorry if I brought up bad memories." Tsukune apologized.

"It's alright. This is will be good for me. Nobody knows me, I don't know any of them. It's a fresh start."

Tsukune smiled and looked towards Rin. "Well it sounds to me like you could use a friend. It will be better if we stick together since we're going to the same school." He said with a sincere smile, which warmed Rin's heart. Tsukune extended his hand once again, which Rin took as he did before.

"Sounds good to me. I look forward to getting to know you Tsukune Aono."

"Likewise Rin Okumura."

"So you two kids are headed to Yokai Academy huh?" The bus driver finally breaking his silence as he addressed the boys.

"Yeah we are." Replied Tsukune.

"Well just a little warning you two: Yokai Academy is a pretty scaaaaaaaary place. Heh heh heh heh heh heh." He replied with a chuckle, causing the two boys to gain weirded out expressions on their faces.

"Oooooookay, talk about cryptic." Rin said.

"Not to mention creepy." Added Tsukune with a sweat drop.

After a few more moments, the bus finally entered a tunnel. After a few more moments, the bus exited the tunnel and stopped in front of a scarecrow. The two boys grabbed their belongings and exited the bus and found themselves in front of the scarecrow. "Well, good luck boys. You're gonna need it." The driver closed the doors and drove away though the tunnel.

"Okay am I the only one to think that guy couldn't get anymore creepy?" Tsukune asked rhetorically.

"No, you are not alone my friend." Rin replied.

"Oh, that's right I have to call Kyouko." Tsukune said pulling out his cell phone. But when he dialed the number, all he got was beeping sound to signify the signal wasn't going through. "What the heck." He said looking at the phone and noticing he had no bars. "That's odd, I don't have a signal."

"Maybe there's no reception out here."

"Yeah, maybe you're right. I'll try calling her again later." Tsukune said putting his phone back in his pocket.

"Who's Kyouko by the way?" Rin asked.

"She's my cousin. Well more like a big sister. She's always looked out for me ever since we were little. She's like a protective older sister, which may at times get a bit annoying, but I still love her for caring so much." Tsukune said. "What about you Rin, you have any siblings?"

Rin was silent for a moment before answering. "I had a younger twin brother. He and I...aren't exactly on speaking terms right now."

"Awww. What happened, did you two get into a fight?"

"I don't want to talk about it, okay."

"Alright I won't push any further. But, whatever went on between you two I'm sure it will work itself out. After all, he's your brother. You can't stay mad at family forever."

'I sincerely doubt that.' Rin thought.

"Well, just remember Rin, if you ever want to talk, I'm here for you man." Tsukune assured his new friend.

Rin smiled at Tsukune's offer. "Thanks Tsukune. Now come on, let's get to orientation before it starts without us."

"Right, lets go." With that, the two boys took off into the forest and straight to Yokai Academy.

After a bit of walking, Rin shot a question to Tsukune. "Hey Tsukune, can I ask you something?"

"Sure Rin. What's up?"

"Are you by any chance...a human?"

Hearing that came as a surprise to Tsukune. He didn't know that Yokai Academy was a school for monsters yet, so hearing a question like that was unexpected. "Well, yeah. What else would I be?"

"How did you end up at this school anyway?"

"Well it's kind of a long story." Tsukune replied while scratching his cheek. "You see I didn't do too well on the entrance exams to get into a high school I wanted. Then one night, and somehow by luck, my dad found an application to this school. Cool part is there weren't any need for entrance exams. So it was either this or risk becoming a ronin." He finished. "Why Rin, is there a problem for me being in a school like this?"

"Wellll, the thing about this school is-" He was interrupted when Tsukune became wide eyed and jumped a little in fright. "Whoa, what's wrong?!"

"W-what was that?!" Tsukune asked shakily. He looked as if he saw a ghost.

Rin looked around to try and see what was scaring his friend. "What was what?"

"Hey Rin, do you get the feeling that someone is watching us?" He asked with a rather shaky voice.

Rin looked around the forest for a bit. "No. I honestly don't get that feeling. You're probably just being paranoid."

"I'm telling you man, I'm not going crazy! There is something out there." Tsukune wasn't lying, soon after the two started to hear a flapping sound.

"Wait, now I'm hearing it too. What is that?!" Replied Rin. He took the sword bag off his shoulder and prepared to take out his sword. As the flapping got closer, they looked up and...

"It's just me, a bat. Wheeeeeee." Seeing the source of the noise brought a feeling of relief.

"Whoa, a talking bat. That's pretty cool." Rin said gleefully.

"Oh man, what a relief. To think I was losing my mind over a-"

BAM

Tsukune never got to finish as a bicycle came out of nowhere and crashed right into him. After the rider crashed into him, both the rider and Tsukune found themselves a distance away from Rin. Seeing this, the half blood son of Satan ran to the two to see if they were okay. "Oh crap! Tsukune, are you alright buddy?" Rin asked frantically.

"Y-yeah, I'm fine for the most part. I'm just wondering what hit me." said Tsukune as he tried to regain his bearings and find out what hit him. He tried to pull himself up, until his hand landed on something soft and warm.

"Ughn!" A new voice made itself known, surprising the boys. "I'm sorry, my anemia started acting up and I got dizzy." They both looked towards where the voice originated and what they saw, they felt like their hearts stopped.

In front of them was probably the most beautiful girl either of them ever laid their eyes on. It was a girl around their age, with eyes as green as emeralds, delicate pale skin that shined in the sunlight, and long pink hair that fell down her shoulders and past her back. Around her neck was a black choker with a silver cross embedded with a red gem in it. She was wearing what appeared to be a female version of their school uniform, which consisted of a green blazer with a white blouse and a plaid skirt.

'My god, this girl is gorgeous.' Tsukune thought to himself.

'God damn, this girl is hot. She just might be hotter than Shiemi or Kamiki.' Rin thought to himself.

It was then that Tsukune realized that his hand was on the girls thigh, causing both his and the girl's faces to turn a bright shade of red. "I, I, I uh..." The girl tried to get a sentence in but just couldn't find the words to say at the moment. Rin couldn't help but feel a little jealous.

'Lucky bastard, why can't I ever have that kind of luck.' He thought.

Tsukune retracted his hand from the girls thigh and stepped back. "I, I'm sorry! I swear I didn't mean to grab you there. I swear I'm not a pervert or anything like that." He tried to explain his actions when he felt something warm trickle down his face.

"Oh shit, Tsukune you're bleeding." Rin said to Tsukune, causing Tsukune to become alarmed.

"Oh no, I'm sorry. Here let me clean that up for you." The girl said taking as handkerchief from her breast pocket. She went to Tsukune and began to clean the blood from his face.

Tsukune blushed at how close she was to him and could not help but take in her scent. 'Oh my, she smells so heavenly.' Tsukune thought with a smile on his face. Again Rin couldn't help but feel a little jealous of Tsukune.

'Dammit! First the lucky bastard gets a feel of a pretty girl's thigh and now he gets to smell her. Man, why couldn't it have been me who got hit?' Rin jealously thought.

While Tsukune was smelling the girl, he didn't realize that she too was smelling him. He took a look at her and noticed that her pupils were dilated as she leaned closer to his neck. "This smell, I can't resist anymore." Tsukune made a confused expression at her comment. The girl started to move closer and closer towards Tsukune, making him blush at how close she was.

"Uhhh, what are you doing?" he asked. She suddenly cupped his face.

"I'm sorry, I can't help myself." she whispered in his ear. "It's because...I'm a vampire." Her canines became elongated and she proceeded to bite into the flesh on his neck.

"Hey, hey, hey! What are you doing to him!?" Rin yelled in surprise.

After a few moments, the girl realized what she had done and got off of Tsukune. "Oh my goodness, I'm so sorry." she said.

"Ah, you bit me." he stated as he put a hand to his neck where she bit him. 'Huh, it doesn't really hurt.' he thought.

"Tsukune are you alright?" Rin asked helping him up.

"Yeah I'm fine Rin. If anything, it doesn't really hurt." He replied back to his half blood friend.

The girl noticed a pamphlet for Yokai academy on the ground and picked it up. "Oh, are you both going to Yokai Academy?" she asked the young boys.

"We are. Today is our first day in fact." Tsukune said to the girl.

"Mine too, and again I'm sorry about biting you." she apologized once again.

"Oh no don't worry about it. But, were you serious about you being a vampire?" he asked her.

"I am. Do either of you hate vampires?" The girl asked with a hint of worry in her voice, which confused the boys.

"No not at all, if there all as cute and nice as you we got nothing against any of you." Replied Tsukune.

"Yeah, I personally got nothing against vampires. In fact, I think they're pretty awesome." Rin added while giving Moka a thumbs up.

The girl's face was graced with a mile wide smile as she tacked both Tsukune and Rin to the ground. "Oh thank you both. If that's the case, then maybe we could be friends. I really don't know anybody here so it would be nice to see some familiar faces." She proposed to the boys with a beautiful smile on her face. Tsukune felt his heart rate spike as did Rin. They wondered how could anyone say no to a face like hers.

"Sure, I don't know anyone here either except Rin here and to be honest it'd be better if we all stuck together." He said gladly accepting the girls proposal.

"Hell yeah, took the words right out of my mouth." Added Rin with a smile.

"Oh thank you both so much. Oh by the way my name is Moka Akashya." the now named Moka told her new friends.

"My name is Tsukune Aono. It's nice to meet you Moka."

"And my name is Rin Okumura. A pleasure."

"Oh were gonna be late for the opening ceremony. Come on lets go." Moka stated as she grabbed her new friends' hands, making them blush in the process. Trying to keep up with the beautiful vampiress as they approached the school, he couldn't help but think to himself

'Oh man, what in the world have I gotten myself into.' Tsukune thought to himself.

Rin on the other hand was thinking something totally different. 'Hehehe, oh man, a pretty girl is grabbing my hand right now. And we get to go to school with this total hottie, suck it Yukio you asshole.' He thought with a smirk.

And from there, Rin Okumura was on his way to his new life at Yokai Academy, eager and ready to see what his new life had in store for him.