Disclaimer: I don't own Highschool DxD. I also don't own the picture. If you are the owner of the picture and want it removed, please tell me and I will remove it.

So, this is an idea I had recently and I felt like trying it out. If the first chapter get positive feedback, such as reviews, favorites and follows, I will continue. Just as a reminder, this is the prologue, as such, it's small. If this story turns out to be good, I will post 3.000- 6.000 words chapter once a week. Also, one more thing. I am still on the volume 6 of the L.N, as such, I don't have alot of knowledge on the DxD universe. Well, I am reading a volume every two days, so I will catch up soon. Either way, hope you guys enjoy.

One last thing, this Issei will be OP as hell.

Oh yeah, because of a certain review, I felt like I should write this warning.

Warning: Even though Issei will be OP as hell, he will only start using his powers on an OP level much later. I would say about 5-6 chapter from this one.

"Damn you Zaza-chan, I wanted a -" I stopped mid-sentence as I noticed my surroundings. I looked around with curiosity. I was in a dark place. Strange... I could have sworn I was speaking with Zaza-chan just a little while ago...

I then noticed something. I was sitting on something soft. I immediately looked down. I was on top of a bed. Huh? Why am I on a bed? My eyes then widened as I figured out. I had been dreaming just a minute ago.

"Ah... that explains it" I said as I got up from the bed. I then looked at my attire. I was wearing only underwear. Oh well... it's not like there is someone here. I then looked around the pitch-black place I was in.

Seriously, where am I? Wait... I remember... I had been bored after teaching Sir-chan a bit, so I went back to sleep at my place. But still, that didn't explain why it was so dark. I snapped my finger while I thought of the place being filled with light. Instantly, it brightened up.

"Ah, much better" I said as I looked around my now bright home. It was the same way as I had left it. Empty. Empty as hell. Just a huge room with a bed in the middle. Nothing more. I really should put some decorations here. I then clapped my hands and some furniture appeared. Ah, much better. I then sat down on a chair that had appeared.

"Let's see... what should I do now?" I said as I tried to come up with things I could do. Sleeping? Nah, got tired of that. Fighting? Also, no. There wasn't any opponent worthwhile. Umm..maybe I should figure out what happened to the world while I slept. But how... Oh right, I can call him. I then concentrated hard.

"Hey...Chaos-chan, you there?" I called out in my mind. A minute later came a surprised reply.

"Master?!"

"Yup, it's me Chaos-chan. Could you do me a favor and come to my house?"

"I will be right there"

Three seconds later, a puff appeared in front of me and a large black wolf appeared from the smoke. It then looked at me intently.

"Master...is that really you?" The wolf asked with a surprised expression, well as surprised as a wolf could be.

"Yeah, I am pretty sure"

"When did you wake up, master?"

"I would say about 3 minutes ago"

"Why did you not call me instantly?"

I scratched the back of my head sheepishly "Well.. I spent the past three minutes trying to figure out where I was"

"I see..."

I then walked over to my favorite, and only, servant. "So, Chaos-chan, how long did I stay in bed?"

"I would say about 200 years"

I looked surprised at that. "Really? That's too... short"

"I know, that's why I was surprised. You normally sleep for hundreds of thousands years."

"Yeah..."

"So, will you go back to sleep now?"

"Nope"

Chaos-chan looked at me strangely. "Why not?"

"Got bored of it"

Chaos-chan feel down to the ground in surprise. "How, just how, did you get tired of such a thing?"

"Dunno, but it's boring now. Do you know of anything fun I can do?" I asked Chaos-chan hopefully.

Chaos-chan face then became one of deep thought. "Fun you say..." He muttered.

"Yup" I answered with a happy-go-lucky smile.

"Master, since you slept for a good time, you don't have any idea about the Great war, right?"

"Great war?"

"Thought so..."

"Well-" Chaos-chan started speaking, but I interrupted him.

"I know! I should call Sir-chan!" I exclaimed as an idea came to my mind.

Chaos-chan shook his head.

"You shouldn't do that, master. He already has a lot to deal with. If you were to appear..."

"A lot to deal with?"

"Yes, he is now a Maou"

My eyes widened. That little fragile stupid boy was now a Maou?!

"Maou? But I thought that seat was already taken by Lulu-chan, Levi-chan, Beel-chan and Asmo-chan."

"Oh, right, you do not know. They are all dead"

I looked at Chaos-chan with a blank look. What was he saying all of a sudden? They are dead? The Maou are dead? Is he stupid?

"Chaos-chan, don't be stupid. They aren't dead"

"No, master. I am quite sure they are dead. They died in the Great war a thousand years ago."

"Okay, I will ignore your stupidity for now. Tell me what this Great war was."

"Alright, master. A thousand years ago, the three sides, angels, fallen angels and devil fought. During that war, two dragon started fighting and in order to kill the two dragon the battling sides joined forces. On the end of the war, all four Maous and God died, along with a huge amount of forces from three sides"

I sighed. Seems like Chaos-chan wasn't smart enough. I decided to explain it to him.

"Chaos-chan, let me tell you something. God along with the original Maous are immortal. They can't die. They probably just got bored during the war, pretended to die and right now are fooling around in the human world."

"Master, I saw it with my own to eyes. I'm sure they died."

I sighed again. "Chaos-chan, believe me. They can't be killed. Well, there is only one person capable of killing them, but I'm pretty sure said person did not participate in the war."

"Who is that other person?"

Really?! How slow can he be?!

"It's me."

"Oh.."

As I stared at Chaos-chan surprised face, I thought of something. Wait... he said that the war was 1000 years ago. I was awake 200 years ago... Huh?

"Hey, you said that the war was 1000 years ago, right?"

The wolf nodded.

"How come I didn't know about it at the time I was training Sir-chan?"

"Ah, about that... I was planning to tell you, but since you didn't stop training with him, I didn't have the chance"

I looked at him blankly.

"How could you possibly not tell me that?!"

"Sorry, but you were so occupied with your training..."

I sighed. Seems like Chaos-chan needs some discipline lessons.

"Okay, so, do you have any idea about what I should do now?"

"Umm... I do not know if this would interest you or not but Sir-sama's sister is going to attend a school in the human world along with Leviathan-sama's sister."

"Levi-chan? Wasn't he supposedly dead?"

"Ah, I forgot to tell you. The names of the past Maou are now titles."

"Titles?"

"Well, yes. But they are also the new names of the current Maous"

Curiosity filled my mind the moment he said that. If each new Maou got a name from the previous ones, what would Sir-chan's name be?

"Ah, so what is Sir-chan's new name?"

"Lucifer"

My eyes widened.

"So now I can call Syr-chan Lulu-chan now?"

He nodded.

"Oh, it's gonna be fun to tease him" a devious smirk started to form on my face.

"Well, let's leave that topic for another day. Now to what we were speaking about before. Does the fact that both Maous sisters are on the human world interest you?"

I nodded. It seemed like it would be fun. I wonder what Sir-chan sister looks like...

"Okay, that seems fun. Take me to the human world!"

"Not now."

"Huh? Why not?"

"You first new to learn about the current human world" Just as he said that, a huge pile of books appeared near me.

He then pointed his pawn at the mountain of books. "That is all the knowledge you need to know."

I nodded. I then walked over to the pile. About 5000 books, huh? Oh well, might as well do it fast. I then snapped my fingers and the whole mountain disappeared. Just as that happened, endless knowledge started entering my mind.

After 3 minutes, it was done. I looked over to Chaos-chan with a surprised face.

"The human world is freaking AWESOME!"

Chaos-chan chuckled.

"Thought you would say that"

I nodded hurriedly.

"So? Can I go now?"

He shook his head once more.

"No, master. You can't go there in your current state. You must become human first"

My eyes widened. What kind of bullshit was he saying? Me? Human? Does words don't even make sense together.

"Me become a human?"

He nodded.

"Are you alright on the head?"

Chaos-chan sighed.

"Master, I did not mean you literally becoming human. That would be impossible for you. What I mean is to seal your powers, your body, make a human body and put you inside it along side with your sealed body and powers"

"Wait... so you are saying that I will create a human body, seal my current body and powers in it and then transfer to it?"

"Exactly. That way you would seem human, but you would still keep all your powers, although sealed. Also, you would continue being immortal, since your real body would be sealed and in the moment your human one is destroyed, it would come back"

Wow, that wasn't a bad idea. Seems like Chaos-chan can have some good ideas once in a while, huh? Still, I wouldn't be able to use my powers, right?

"Hey, the idea is good, but I wouldn't be able to use my powers, right?"

He shook his head.

"No, we will keep mental communication. Every time you need to use a power, just tell me and I will unseal a part of your power for you. You could always unseal it yourself but that would be tiresome."

I nodded. It seemed like a good idea. I decided to continue discussing the future.

"Okay, you said Lulu-chan's sister is going to enter a school in the human world, right? If so, when?"

"Well, right now she is only 1 years old, so I am not sure, but surely before 13"

"Wait, she is one? How come you know that she is entering a human school?"

"I happened to overhear Lucifer-sama and Leviathan-sama talking about it."

"Ah... Okay. So, I am entering the human world when she enters school?"

"No. I was thinking of making you into a baby and place you in a family"

"Hah?"

"You see, my plan is as follows. You would become a baby, then I would lace you in an orphanage. Then, I would have human parents adopt you trough mental manipulation, and upon reaching the age of two, I would transform into a cat and have them also adopt me from a shelter"

"Umm... interesting. Do you already have any human parents in mind?"

"Yes. They are Ms. And Mr. Hyoudou. They are normal in every possible way. They would be perfect. They also live near the school the sisters of the Maous will attend in the future."

"I see.. but when did you choose them?"

"During our conversation"

Oh, so Chaos-chan can multi-task. As expected of my favorite, and only, servant.

"Okay, seems like we have a plan. There is only one thing left"

"What might that be, master?"

"My name. Should I choose a new one, use my current one or my original one?"

"Well, your original one would seem strange in this day and age, so I suggest you go with your current one. The one you chose when you first met Lucifer-sama."

"Ah, O.K , so make sure you make my future parents name me Issei"

"As you wish, Issei-sama"

I still have not decided on the harem members. On a side note; he uses chan in two situation. If the person is a man, he uses chan to annoy them. If the person is a woman, he uses it because... just because.