Disclaimer: I do not own the Campione! series, or the High School DxD series.(obviously) They belong to Taketsuki Jou and Ichiei Ishibumi respectively. So all I get from writing this is just improving my writing skill and some personal satisfaction that someone (hopefully) likes it.

Note: I got a lot of inspiration from: trung-t-rung's Campione:A new story.

Life 0- Another pain in the ass

Empty grey as Shinji opened his eyes all he saw in his vision was an empty tunnel. The Netherworld, the boundary between immortality and death; it is here that the mother of all Campiones, Pandora, makes herself home. Shinji raised his head and looked around.

"Tch… Guess I'm not dead yet. Hey old lady, are you here!?"

Smack

"Ouch what the hell was that for!" Looking up Shinji saw a young beautiful girl. Despite her appearance the girl was actually a several thousand year old goddess; Pandora his "Mother".

"While I do appreciate you calling me mother, that is no way to treat to someone you haven't seen in decades." Due to a certain event fighting a certain heretic god fifty years ago Shinji was killed. However a magical artifact managed to revive him at the cost of a dear friend of hiss's life. During that time he had a chance to speak with Pandora in the process building a… Unique relationship with her.

"Why am I here using the [Sword] should have drained me of any magic I had left? I should be dead due to those wounds." Shinji's authority the [Sword], at the price of amount of magical energy called forth the demonic version of the sword gram that the hero Sigurd used to kill the dragon; Fanfir.

"Apparently when you killed that war god Verethragna you gained his authorities and one of those authorities allowed you to revive after death. "Pandora answered nonchalantly.

"But that doesn't make sense I should already have been dead!"

"… Some type of power unknown magic was used to revive you."

"Oh crap, don't tell me…"Horror dawned in Shinji's eyes. "That old creep turned me into one of his creepy ass zombie soldiers…." The creep he was talking about was the Campione Sasha Voban, who had an authority to enslave any of the souls he has killed and turn them into his servants.

Pandora shakes her head "Weren't you paying attention I said unknown! Anyway that magic that was used on you has caused some kind of master servant relationship to be implanted into you, however its very weak. Oh and it attempted to turn you into some kind of other race, similar to the curse that turns you into a Campione." A terrified expression appeared on Shinji's face but before he could open his mouth Pandora frantically waved her hand to get Shinji's attention. He did not notice her hand still panicking then Pandora smacked him in the face. "Look you're not going to be turned into a weird tentacle monster, your magic resistant stopped it from transforming you! However for whatever reason you are no longer in the dimension that you were in, and that master-servant thing is still inside of you. But, you still have all of the powers and authorities of a Campione along with those new ones that you gained from Verethragna."Sensing that their time was nearing an end Pandora patted Shinji's head. He reacted; confused at why she did that before he felt intense pain in his body.

"Look at the time, looks like your revival will be complete soon. Try not to die again so soon have fun in the new world and remember, actually you probably won't but mommy loves you!" Pandora said cheerfully.

"..." The pain in his body disappeared, and with that the god slayer was gone from the Netherworld.

Due to the nature of the Netherworld most mortals who enter it tend to lose all of their memories of what they did while there. There exist rare exceptions like people who have attained spiritual enlightenment. Shinji was not one of those people yet he still retains his memories due to being a Campione increased sixth sense. So he got the general gist of things that had happen. Shinji checked his body. All of his wounds from the battle was gone, and he felt that he had gained some new abilities, though not sure how to activate them.

"So let's find out who my kidnappers are." His body entered a state of alert, he then increased his magical energy by a small amount. He leaps from his bed to his surprise and to the surprise of the crimson haired little girl.

"Ah you're up Onii-san! Are you feeling better?"After regaining her composure she rushed to Shinji's side.

"I'm fine, mind telling me who you are?"Shinji replied.

The girl places her hands on her hips, and then takes a deep breath, "My name is Rias Gremory! And we are currently in a guest room in my house. So Onii-chan what is your name? Do you have any cool abilities since from now on you are going to be my servant it would be amazing if you did."

Shinji took a deep breath to calm himself. "First off, my name is Arisato Shinji. Next what do you mean by servant?"

"You're my servant Arisato-Nii. When I was going to visit Adjuka-oujisan to visit and pick up my evil pieces. There was a bright explosion about thiiiss biiig" She stretched her hands out as far as she could "Then Arisato-Nii appeared and he was very hurt. Onii-san said that the only way we could save you is by making you part of my peerage. I had to use…" She raises eight of her fingers "That many pawn pieces in order for it to work. Onii-san and Oujisan was very surprised." An alarmed expression appeared on her face "Oh I forgot to tell Onii-san you are awake I'll come right back!" She rushed out the door.

Shinji lies back down on the bed. He took a deep breath then proceeded to access the situation.

Some kind of magic managed to send him into this world.

So apparently due to something called evil pieces he was somehow revived from death.

In that process it turned him into Rias's servant. But contrary to her words he did not feel obligated at all to follow any of her orders. So how is he a "servant" Before he could have thought on it some more a knock on the door kicked him out of his thoughts. He looked up and saw an older man appearing to be in his late thirties with crimson hair walking into the room.

Sirzechs entered the room after his sister told him the boy had awakened. When he entered the room his senses screamed out "Alarm!" this boy; no despite his appearance something tells him that this boy is much older and dangerous than he appears. It took the powers of two maous (Demon lord in case you didn't know) just to break through this boy's magic resistant and implant the evil pieces. But instead of being reborn as a devil the moment the pieces injected magical energy into the boy he revived on his own.

Sirzechs spoke carefully showing little emotion in his voice "It's nice to meet you, Rias told me your name is Arisato Shinji correct? My name is Sirzechs Lucifer… One of the four Maous."

"Lucifer… of the four maous!? Oh hell another heretic god!" When he heard the name Shinji immediately sprung into battle mode. He leaps from his bed and began releasing an immense magical energy. He tried to call on his [Sword] but nothing happened, damn it he thought not all of my powers are back yet.

Sirzechs took a step back when he felt the magical energy being released from Shinji. It was considerably higher than his possibly higher than two maous combined. Not good if we were to fight here Rias would be harmed.

"Calm yourself I am not here to fight."Sirzechs raised his hands to show that he had no intent to attack. When he heard those words Shinji lowered his magic energy and adopted a neutral stance. "Umm… Sorry about that Lucifer-san right? When I heard that name I was a bit surprised."

"Oh so you believe I am actually Lucifer?"

"I see no reason to not believe you. Sides I can see that you are suppressing a massive amount of energy. Seeing as you haven't released it yet I can assume that you don't mean to attack." For the first time since Sirzechs entered the room he had lost his composure revealing a surprised expression but quickly suppressed it. "I appears that we both have some things we like to keep secret now don't we? It was quite surprising when your body rejected the evil pieces. It took a nearly all of the magic energy from Adjuka Beelzebub, and myself to break your magic resistance. Yet still your body rejected the transformation into a devil. Would you mind telling me why your body accepted the pieces but rejected the transformation?"

"Well as far as I can tell your evil pieces managed to heal my body completely then my magic resistant prevented the transformation into a devil. Still those pawn pieces are still a part of me, but I did not turn into a devil. So can you now tell me why you would try and turn humans into devils?"

Sirzechs began a very long explanation about the history of devils. Apparently there was some kind of three sided war between them, the angels, and fallen angels. It had drastically reduced the population of the factions. The devils lost the original four maous and half of their 72 pillar pure blooded clans went extinct. In attempt to fix this population problem the current Beelzebub created the evil pieces to fix the problem. They are magical pieces shaped like chess pieces that went injected into a person's body it changes them and turns them into a devil, and each pieces grants different powers.

"So as of now you are my sisters 'Pawn'."

Shinji suppressed the urge to say something about being a pawn. Although it wasn't a derogatory term, it didn't sit right that after all the crap he had to go through he is a pieces that could be considered expendable.

"Now that I have told you this Arisato-kun would you mind tell me what you are and where you come from?"

"Now what do you mean by that Sirzechs-san?"

"There is no point in denying it now. Adjuka was testing some type of inter dimensional artifact before you appeared. You where terribly injured so the first thing we did was use a high level healing spell on you but to our surprised it didn't work. Not to mention you managed to sense my real power despite my going to great lengths to suppress it. There is no way you are a normal human being." Shinji took a deep breath, may as well get this out of the way now rather than later. Let's just hope this doesn't lead to another fight.

Shinji sighed "In my world… Ehh how do I put this… I kill gods for a living, people call me a Campione; God slayer." It was his turn to reveal about his origins and he proceeded to explain to Sirzechs, leaving quite a few things out that he didn't need to know about.

"I see so that's why our magic did not work on your body."

"Correct its one of the base traits that all Campione have."

"This is bad… If the other factions find out that the devils have someone who can kill their leaders easily it will lead to full scale war..."

"Then how about I try to blend into society here? Sides I can keep my powers suppressed so we don't have to worry about them finding out if I keep a low profile and not do anything stupid."

"That would be best for now."

A switch in his brain flipped, an alarm, Shinji felt something dangerous was coming.

A powerful crimson aura began to emit from Sirzechs body, the aura attempted to crush the god slayer in pressure. In response to this, Shinji released an equally powerful aura if not more powerful. He stared at Sirzechs leaking a massive amount of killing intent as if daring him to try something.

"My last question… Do you intend to harm my sister Rias? Either it be now or the future?"Shinji suppressed his aura and chuckled.

"Of course not! I may be a Campione but I have an unspoken code of not allowing innocent people to be harmed by my actions!" Sirzechs stared at the Campione a minute passed he then suppresses his aura.

"I believe you."

"Seriously that's it? I was expecting some kind of huge show down between myself and you… I kind of feel a bit disappointed that nothing has happened but oh well." Sirzechs begins to walk toward the door

"Now I believe Ria-tan is waiting impatiently to meet her first servant. Quick warning she can be quite a handful when she is excited so… good luck I'll tell you more about the world of devils later." He then left, Shinji sat back down on the bed dumb folded at his quick change before the door burst open and he is assault by his new master.

Being a servant of Rias was not what Shinji was expecting. He thought that servant work would have involved getting bitch at by everything he did wrong by some snotty elitist prick. Or being a bodyguard to the person.

Well that was partially wrong he was to protect Rias if an emergency were to arise.

He didn't really expect to become her playmate.

After hundreds of years of fighting gods, he was now having a tea party and playing house with a 7 year old girl. Jeez if the other Campiones where to find out about this… This is going to be repressed for years.

That said apparently it could have been much worse. After doing some research when he had free time Shinji found out that the Gremory clan was different from the others. While most other clans treat their servants harshly, some even treat them as inferior slaves. The Gremory's treated their servants a lot more like equals and were very affectionate. Seeing as he had nothing better to do Shinji decide that he would stay with Rias.

As the years went by Rias's peerage eventually grew. While at first it was only Shinji eventually a young girl by the name of Akeno came taking the spot of queen.

She was a half fallen angel around the same age as Rias. Apparently her mother, a human priestess, died while her father was out on a job of some sort. They were attacked by people who were against their marriage. She hated her father for not being there to save them and ran to her relatives for help. They wanted nothing to do with a "dirty half blood" and threw her out on the street. Eventually we found her and she joined our group. She and Rias ended up becoming best friends as the time went by.

The second person to join was the rook a nekomata by the name of Koneko Toujou. She was a rare breed of some sort and her sister went crazy and killed her own master. She was sentenced to death when her sister escaped. Luckily Sirzechs interfered and she ended up becoming Rias's rook. At first she was depressed and emotionless but due to the loving environment of the Gremory house she eventually snapped out of it.

The last person to join her peerage was the knight, Yuuto Kiba. He was a human boy that the church attempt to experiment on him in order to gain control of the holy swords. Kiba and his friends were eventually all killed due to the experiments. After Rias revived him he swore revenge against the church.

For Shinji after the death of his wife Lillian and most of his other friends, due to war or old age he had wandered the world alone. This was a chance for him to heal whatever scars that may have left on him.

Aside from Sirzechs and the three other maous no one knew of Shinji's Campione powers.

Life was starting to become peaceful for Shinji, aside from the usual side jobs he has to do for Sirzechs ever now and then, life was peaceful. Yet he should have known better.

Being a Campione meant that another pain in the ass was on its way.

Author Notes:

So I hoped you guys enjoyed that chapter please review and tell me what you liked and didn't like. Sorry that there wasn't much action in this chapter but heads up next chapter we get to see Shinji kick some fallen angel ass. Oh if you notice any mistakes I missed please point it out and lastly if you have any suggestions about what his authorities can be please give them.