Good morning ladies and gentleman, i'm here to present you a new history involving the worlds of Highschool DxD and Rosario + Vampire with some elements of Naruto. The story will be divided in two arcs: the youkai arc, where my OC (a nekomata) is going to be part of the Rosario + Vampire world until the defeat of Alucard: and the faction arc, where my OC (and maybe some of the R+V members) will be introduced to the Highschool DxD world (but not in the first season, maybe in the fourth, I haven't decided). First of all, I want to thank Fairy Tail Dragon Slayer for his permission to use some elements of his story Naruto of the Twin Tails, named the use of the inner gates. Second of all, the mix between the two worlds isn't going to be perfect: Yasaka shall rule in Kyoto but the Youkai Academy is going to be an attempt of all the Youkai faction to create peace between humans and them. The three Dark Lords will be Mao-class level, with the exception of Akasha and Alucard, who are going to be Superdevil level (Shinso will be considered to be a parallel form of superdevil, you can think of it as a supervampire). Finally I wish to thank you for your time and hope that you like the story. Any comments, criticism and suggestion you have may be answered.

Disclaimer: I don't own Rosario + Vampire and Highschool DxD.

Chapter One: A new beginning

It was a cold night of December, the wind was soothing and the silence ruled over the place. A lone crow sailed over the sky as snow gently fell down, decorating the trees and houses. In the corner of the house, a cat can be seen trying to comfort her children, who are restless by the cold. Near the park, two figures were running out of the city.

The taller figure can be described as a beautiful woman. Her white hair, pink lips and brown eyes were testament of her beauty. The heavy clothes that she was wearing covered most part of her skin but her face clearly showed her pale skin. Behind her was a 7 years old child who was trying to keep up with her mother. The boy had the same eyes as her mother but with black hair. He, as her mother, was wearing heavy clothes and from the distance one could hear his harsh breathing as he was running near exhaustion. The two of them were maneuvering between the trees and houses, trying to lose the people who were tailing them.

''Mom…., I can't keep up…, I'm… tired'', the boy said.

"Just a little more sweetheart, mama is with you", the mother said.

In that moment, a beam of black energy pierced through the walls of the houses and impaled the mother in the right shoulder, knocking her and her child down.

"MOM!", the boy shouted, trying to keep the tears from falling.

"Shori…, run…", the mother weakly pleaded, trying to get up.

The now named Shõri violently shook his head. "I won't leave you behind" he exclaimed, "you promised… you promised that you would be with me". The boy, now with tears falling from his eyes, exclaimed "I lost dad, I won't lose you too".

The mother was going to reply when the harsh steps of people coming near them got louder. Worried, the mother, with blood coming out of her shoulder and her mouth, weakly got up and pushed the boy against some trashcans.

"Don't talk", she whispered, "when the situation arrives, run as fast as you can".

"But mom-"

"There you are, filthy cats".

From the hole in the destroyed wall two men, dressed in thick coats, boots, thick gloves and black hoods, came out.

"Why are you doing this", the woman exclaimed, positioning herself between the hiding place of her son and her pursuers, "you took away my husband, and now are trying to kill my son and me…, WHAT DID WE DO TO YOU?!" she shouted at the end.

One of the hooded men created a magic circle, from where a black thunder crashed against the woman, frying her nerves and making her cry in pain.

"Silence whore", the man exclaimed, bringing out a pair of black bat wings, with his partner doing the same. "This is you punishment for being a filthy cat, all of you deserve to die, and I'm happy to obligate", the man exclaimed with a grin.

"You are monsters", the mother weakly said.

"No, you are the monster, disturbing the equilibrium of the devil society with your accursed Senjutsu, but don't worry", the man happily exclaimed, an evil smirk adorning his face, "after I finish with you, you and you scum of a son will be very happy in the afterlife".

Hearing this, the woman slowly got up and started to gather the few chakra she had, "I won't allow it", she whispered, "you can do whatever you want to me, but I won't allow you to harm my son", she exclaimed, running toward the man, cocking her fist to deliver a chakra-enhanced punch.

"Filthy trash", the man exclaimed as he sidestepped her and delivered a lightning-enhanced kick to her back.

"AHHHH!", the woman shouted, vomiting blood and falling to the ground.

"Mooooooomy", the boy shouted, running toward her mother and trying to wake her up. "Get up please…, come on, you… you can't leave me alone, yu… you promised", Shõri pleaded and cried.

"Shhh, don't… cry", the mother weakly exclaimed, "get… up… and… run…"

"NOO, please, don't leave me alone", Shõri pleaded, grabbing her hand.

The mother slowly elevated her hand and touched Shõri's cheek, "It's… okay…, mommy has to go, she… will be with papa now…"

"Mom…", the boy cried, hot tears trailing down his face.

"Be safe, be strong, and remember…", the mother exclaimed, bringing Shõri's head down "no matter what happens, I will love you until the end, me and your father…"

"I love you too….", the boy sadly whimpered.

The mother's hand slowly fell from Shõri's cheek until it hit the floor. The boy's shoulders shook violently and tears were falling to the ground.

"What a touching end", one of the hooded men commented, "that whore was brave until the end".

"But it was of no use", the other man mocked, bringing his hood down to show his blood-red eyes. "Now boy, i will be benevolent with you and will give you the opportunity to be with your mother", he exclaimed with a twisted smirk, preparing a magic circle with his partner to unleash into the boy.

In that moment something snapped in the boy's mind. Hot energy flowed in his body and deep in his mind the sound of a gate opening could be heard.

"MOOOOOOOOOOOOOOM…..!"

Brown eyes opened, staring at the ceiling of the bedroom the owner was sleeping. A black haired boy got up from the bed and stared at the photo of a white haired woman hugging a black haired boy of 7 years old.

"It's been 10 years since then…", the teenager exclaimed, slowly detaching his eyes from the picture and moving to the bathroom to take a bath.

It has been 10 years since Shõri lost her mother in one of the cat hunts, which were common occurrences during the period denominated "The Neko's Purge". Since then, he moved from his birth town to the city of Tokyo, in where he started a new life. Shõri is a type of youkai named nekomata, a cat youkai specialized in the use of chakra and senjutsu. Since his arrival to the city, Shõri started his training in chakra, preparing himself to whatever problems he could encounter in the future, namely the devil faction. The supernatural world, the one that most humans were not aware of, was compromised by different entities, which were organized in factions. The three biggest factions, Devils, Angels and Fallen Angels, had been fighting since the beginning of the times, killing hundreds of living beings. The battle ended when the leaders of the Angels and Devils, God of the Biblie and the Satans, died in a last battle. Since then, a ceasefire occurred in which none of the three factions would attack each other. This decision was not welcomed in the Underworld, where a civil war erupted: the Satan Faction, leaded by the descendant of the original Satans, wanted to continue with the war, and the Anti-Satan Faction, leaded by Sirzetchs Gremory, Ajuka Astaroth, Serafall Stiri and Falbium Glasya-Labolas, who wanted to conserve peace. In the end the Anti-Satan Faction won when Sirzetchs delivered the final blow to Rizevim Lucifer, ending the civil war. After that, Sirzetchs, Ajuka, Serafall and Falibum became the new Satans. After this event the supernatural world stated to make plans to reconnect with the human world. One of these entities, the Youkai faction, created a school named Youkai Academy where youkais learned to coexist with humans.

"Are you finished with your bathing, boy", a creepy voice sounded from the living room.

The door of the bedroom opened, and a now dressed Shõri got out of the room. He now is wearing black jeans with brown boots, brown t-shirt, brown fingerless gloves and a black hat.

"You know, I'm very grateful with you for your help 10 years ago, but appearing inside someone's house is just creepy", Shõri said with a straight face, moving to the kitchen to grab some breakfast.

"I know, but I have to check on you, otherwise you could end up passing out by exhaustion thanks to all the training you do", a man with a bus uniform answered, his glowing white eyes gleaming with amusement.

"Why are you here?" Shõri asked, going straight to the point.

"So impatient", the man chastised. "Are you not happy to see me?"

"No", Shõri said, finishing his breakfast.

"Blunt as ever…" the ban chuckled "well, if you want to know, I have a proposition to you".

"And I care because…?"

"Because it could be fun", the man exclaimed with a happy expression, taking out a cigarette and lighting it up.

"You are wasting time and air blabbing about things you have yet to explain", Shõri deadpanned.

"True, true…" the man chuckled. "What I want to propose to you is to assist to the school that a friend of mine is on charge"

"Why on earth would I want to be in a school infested with other youkais?" Shõri asked.

"Well…, you could try and have more friends..?" the man proposed.

"You are kidding, right?" Shõri deadpanned.

"On the other hand, there are strong guys there who can give you a challenge" the man commented, knowing that fighting strong guys and training are two of the passions of Shõri.

"… I will think about it", Shõri replied after a moment of thinking.

"Excellent, now these are the forms you must fill and this is the uniform of the school" the man happily exclaimed, giving Shõri 3 boxes.

"Wait a minute, I didn't….?" Shõri trailed off, seeing that the man vanished. "I hate when he does that" the boy exclaimed with a sigh.

Putting the boxes down the boy moved to his bedroom and stared at the photo of his mother.

"It seems that a new chapter in my life is opening before me" Shõri said with a wistful smile.

"BEEP-BEEP-BEEP"

"CRAP, I'm late for work!" Shõri yelled, running towards the door, closing it and running out of the house.