I don't own DxD, or anything else. Only thing I think I own is my creativity, or maybe the lack of it. Also, an alert for First Story.

[Great War, Heaven's War Council]

"Father, the situation is like this. We've lost the Assault of Lilith and we're losing ground in Hell rapidly due to Lucifer and Satan causing Armageddon through our forces"

"Michael, we're stronger than those shitty devils, we'll keep attacking them"

"Father, we should def-, what happened!?"

Michael en God discussing their dire situation was interrupted by a loud bang.

"Michael-sama! There's one enemy inside Heaven territory!"

"WHO IS IT!?"

"It's a man in a suit with a sword, but the weird part is, he's just pushing Angels away, he hasn't killed any! He looks like Lucifer."

"Crap, it's Lucifer, only he'd be stupid enough to rush into Heaven alone." Thought Michael, reasoning that he's here to slay God.

"Father, he's after you. He wants to end this what he considers a useless war."

"Says the evil hypocritical heretic. Michael, call all Seraphs and stop him!"

"Father, he's stronger than all Seraphs together, he used to be our soldier! He was all the defence Heaven needed! Not even all Seraphs can stop him when he's utterly pissed! And you pissed him off on four ways! First, you banished him to the Underworld, well that was fine with him. Second, you banished one-third of all Angels, only because they were near Hell Territory. Third, you attacked his house and kidnapped Leviathan. Fourth, just to add more fuel to the enraging fire, you raped her! You'd think he'd sit still after the third reason!?"

"Of course, he's a crappy devil. Oh well, I'll teach that traitor a lesson."

And so, God went off to Angel Central.

[Great War, Heaven, Angel Square]

"RUN FOR YOUR LIVES!" Screamed Angels all over in panic.

"Stop this shithead!" Was heard through the speakers screamed by the inexperienced Angel Commanders.

Nobody listened to that order, the order was given by a High Angel, behind safety lines. So he doesn't know the threat of that intruder. Unfortunately for him, this intruder is Lucifer, the Prince of Pride, according to the Heavenly Teachings.

A ravage brought upon Angel Square, but only because Darkness covering Lucifer was covering all Light in Angel Square, so the damage was repairable with the powers of God and the Seraphs.

Unfortunately, nobody knew that God will die in this decisive battle.

[Great War, Heaven, Angel Centre]

Finally, Lucifer and God meet face to face.

"Hah, a crappy hybrid will never beat pure light!" Said God with a mocking tone.

"That's what the Fake God says." Said Lucifer unimpressed.

"WHAT DID YOU SAY!? I'M THE ALMIGHTY O-" Said God before he got brutally beheaded and sealed with Lucifer's powers.

"Well that should do it, unfortunately, I need to go in hiding, better tell Michael and apologize."

[Great War, Heaven, War Council]

Lucifer walked into the War Council of Heaven and sees Gabriel and Michael.

"It's been a while my brother and sister"

"Oh gosh, what's that coat of death you're wearing?" Asked Gabriel with a terrified voice.

"I'm sorry, Gabriel, it's a cloak of Death. My part-time job as a Shinigami went a bit too well. I had to reap so many souls. Although that's not important. The important thing is, your faith in God is so much, I fear if we tell everyone else God died, Heaven would turn into a new Hell and balance will be destroyed. Tell everyone God has slain Lucifer but with a lot of effort, my fellow Maou know I might die in a suicide mission like this, so there won't be a big riot in Hell." Said Lucifer in a calm voice.

"So that's what happened. I knew that might happen, especially since we attacked your hometown even against our advices, but it seems God was greedy for your head." Said Michael.

"Only thing I am curious about, why did this Great War start?"

"To be honest, I think it's you and the one-third Fallen Angels. God wanted to purify you all to make sure you won't give information about Heaven to Hell." Said Gabriel.

"That's a useless reason. I'll take my leave. Goodbye Michael and Gabriel, may Heaven prosper under your rule."

And so Lucifer disappeared from obvious sights.

[The Hell History goes on as this]

After the Great War, there was a civil war between the First-Successors Faction(Also known as the Old-Maou Faction) and the Anti-Maou Faction, which ended in favour of the Anti-Maou Faction. This caused a new era of peace in Hell.

[17 years before zero hour, a hospital in Japan]

"Why is fate so cruel!?", said the Mrs. Hyoudou.

She was holding her dead son who would be named Issei. Her husband was sitting next to her, trying to comfort her. They didn't know what killed him. The parents were in confusion and despair because Issei was healthy until he was born.

Then at this moment, a young man in a black suit walked into the room.

"This boy will be alive again. I just have one favour, make sure he becomes a fine man." Said the mysterious man in black with a smile.

Then suddenly the parents were flashed, when the flash was gone, they didn't see the man in black anymore, but they heard someone crying very loudly.

The doctor who went outside do the procedure of death, also heard the baby cry, he was thinking, did he miss something? He wants to believe in miracles, but he wants to also explain it scientifically, but this is one of the cases that just don't make sense and he dropped the thought.

"This is impossible! How does he live!? Well then, congratulations with your son!" Said the doctor while tearing the death papers.

For the time being, the son was living happily with his parents and somehow likes to know about the mythical and supernatural events, until the mythical almost killed him.

[9 years before zero hour, outside]

"Issei, you can't catch me! You're so slow." Said a child who was friends with Issei

"Irina, watch out, there's a spaceship in the air!" Said Issei, trying to distract that child.

Irina stopped and tried to look in the sky before being hugged by Issei.

"Gotcha!" Said Issei.

"Mou, that was mean, Issei." Said Irina while laughing.

But then unfortunately for them, disaster struck.

"Get the girl and the boy should be disposed!" Said a humanoid with black wings which look demonic to his grunts.

First Issei was surprised Irina was a girl, but snapped out of it and asked:

"What do you need her for? Just leave us alone!"

"Since you're gonna die, we'll tell you. She is gonna be a Holy Sword wielder, so we think of adding her to the ranks of Hell!"

"Bleeh, you'll never make me a devil!" Said Irina mocking the flying humanoids of the Underworld.

"Run to the church." Said a voice in Issei's mind.

Issei, without caring where it came and welcomed all kinds of help, took Irina's hand and ran off to the church.

"Go after them, you fools! The General will be pleased to kill them!"

Arriving safely at the church, Issei sought shelter near a sword and a shield.

And then he heard this:

"I sense greatness in you, it would be a shame if you died now, take the holy sword and the holy shield and defend yourself! These weapons should hold off those corrupt beings."

"Who are you?" Asked Issei in confusion, while not knowing he said that out loud.

"I am Irina, don't you know me?" Said Irina confused.

"No, that's not it. It isn't important now, you should hide for those devils. I'll try to hold them off and survive."

Then the evil beings arrived, showing their wings.

"Let's take his soul!" All four said together.

Unfortunately for them, it wasn't as easy as they expected, because of the holy weapons he wielded.

"Curse his holy weaponry! How is he able to wield them!?" Said the hunters.

Until another group of demons arrived to interfere the battle.

"Who are you!?" Said Issei in an angry voice suspecting reinforcements for the hunters.

The redheaded girl went to him and said:

"We're devils, they're also devils, but they're criminals and most wanted in the Underworld society"

Then he saw the spectacle, the four hunters were obliterated by one red ball.

"Sirzechs/Onii-sama, wasn't that too much for the poor humans?"

"No, Rias and Grayfia, they've seen too much hate already. It's best to erase hate in one shot, also they're most wanted, so killing them is also fine. At least the town didn't get destroyed, so that's a plus for us. I hope Sona and Serafall are taking care of the rest."

"T-t-thank you." Stuttered Issei and Irina while being scared of that great power. But then Issei calmed down and asked in a serious tone.

"Who are you?"

"I'm Rias Gremory and he's Sirzechs, my older brother and her wife Grayfia. Don't worry, it's alright, we won't hurt you without reason." Said the redhead with a smile.

"I'm Hyoudou Issei and she's Shidou Irina"

"Do you want to go home now?"

"Yeah."

[At Issei's place after Rias' party went to the Underworld]

"Issei?"

"Irina? What is it?"

"I'm moving to England tomorrow, for training."

Then Issei's face went from calm to sadness.

"NOOOOOO, IRINA! Why is fate so unfortunate!?"

The first meeting between Rias and Issei and the goodbye from Irina was a lot for Issei to handle, but he went through it and went on.

"Irina, I want you to have this, this shield, it seems bound to me. You won't forget me when you're in training.."

"Issei, that's so lovely, I also have a gift for you."

Irina gave him a heart-shaped silver photo of them playing together. And then she left leaving Issei in tears.

Fortunately for him, his life went normally, until he got enrolled in Kuoh Academy as one of the first men of the just newly co-ed academy.

[2 days before zero hour, canon time start now]

"Do you want to go out with me!?"

"Eh? Ehm.. Yes, I'd love to."

Issei was asked on a date by a black-haired girl, she was Amano Yuuma, a girl as old as him, but he knew something was odd about her, but he shrugged at that oddity.

And then he saw two guys running away from the Kendo Club screaming some kind of death chant.

"GET THE PERVERTED DUO! HUNT THEM, BEAT THEM, MAKE THEM ASEXUAL!"

"Oh, dear," thought Issei, but he knew those two guys can't outrun the Kendo club together, because he knows Motohama's stamina is horrible and that's saying it softly. When the class did a running contest, it was the girls slacking off behind, then Motohama barely staying in front of them, then came the below average guys, then in front of them were the average guys, then came Matsuda, he used to be a sports star, then came the above average guys, which includes Genshirou of the Student Council, then far in the front you had Kiba, the pretty boy of the class, and even further ahead was Issei, he was considered a run junk, due to always running during his childhood.

And there it happened, Motohama is getting bruised until you can't recognize him anymore. Matsuda's fate happened ten minutes later. He was also beaten beyond recognition.

Not that they will learn it, their perversions aren't uncommon for our age, but they are way too open for it. They're even called the 'Perverted Duo'. It's too much lust guys!

[Meanwhile at the Occult Research Club]

"Who are you looking at, Buchou?" Asked the black-haired Oneesama.

"That boy, Hyoudou Issei, I remember him, but I'm not sure why, but he has gotten my interest since he got a date with a Fallen Angel." Said Rias.

"Do we need to keep him under surveillance?" Asked Kiba

"No. He should be fine until the date."

[2 hours before zero hour, Hyoudou Residence]

"I'm going out!"

"Take care, son!"

When Issei stepped outside, he saw someone give him a flyer. When he looked into the flyer, he knew that the date will go odd at one point.

"Yuuma-chan!"

"Issei-kun!"

And so the date progressed normally until zero hour.