Yep, I have decided to bring this one back from the dead... once again. Since I've got a DxD crossover, I figured I'd do just a normal DxD story to balance it out... if that makes sense. The story is still the same, OC is the grandson of the OG Lucifer, is also the heir of the former Extra Demon Clan the Mammons, but won't be engaged to Rias Gremory since birth. Now, the story is going to go from during Damian Mammon-Lucifer's childhood, how he meets Rias, learns of the engagement with her, begins to grow stronger in his training, goes on to start looking for members of his Peerage, and to the eventual start of canon.

And of course, this is going to be a harem story. It's a story set in the DxD universe, of course it's going to be a harem. Though, I will admit single pairing stories seem rare in the DxD category on Fanfiction.

The harem will consist of women from other anime and maybe stuff like comics, movies, tv shows, video games, etc.

Also, BIG thanks to SlashFan2018 who is helping me with this story. Seriously, check out his DxD stories which are freaking amazing!

Disclaimer: I do not own High School DxD. I only own the OC Damian Mammon-Lucifer.

Devils.

Main inhabitants of the Underworld, better known as Hell.

And that was the only thing that most stereotypes of Devils actually got right.

Devils are not all red, they do not carry tridents, and they don't go round killing innocent beings for the fun of it. And no, there is not one Devil, commanding an army of demons to do his bidding.

No, Devils mainly look exactly like human, albeit with one (at least) pair of jet-black bat-like wings that protrude from their back, and can be hidden at will.

Devils don't go round killing innocent beings, like humans, for the fun of it, either. And there's not one true Devil that commands and army of demons to do his bidding. Devils are a civilized race of beings, and they have families, 72 main families (or 72 Pillars, if you want to be technical) though over half of the Devil Pillars were destroyed in the Great War of the Three Factions, between the Angels, led by the God of the Bible, the Fallen Angels, led by Azazel, and the Devils, led by the Four Great Satans (Lucifer, Leviathan, Beelzebub and Asmodeus).

The fighting in the war had ended a short time ago, but there was still tension between the Factions.

However, the Devils soon entered a civil war, started by one faction who wanted to continue the Great War, ignoring the fact that the Devil race was weakened and not at full strength and numbers after the Great War, so if they had continued then it would've led to the extinction of all Devils. This faction was known as the Old Satan Faction, consisting of Devils related to the Four Satans, led by the descendants of the Four Satans themselves. The opposing faction, who was fighting to overthrow the Old Satan Faction and ensure that the Devil race did not fall into extinction, was known as the Anti-Satan Faction.

The war left it's impact on the Devil race, further weakening them and dwindling their numbers down, especially with the low birth rates of Devils. However, hope did come for Devils in the form of a union between two Devils, both from different Households.

Revan Lucifer, the son of Lucifer and Lilith themselves, and Sarlith Mammon, the daughter of Lord Mammon of the formerly Extra Demon Clan Mammon. However, Sarlith participated in the civil war on the Anti-Satan Faction's side, much to her father's anger as he shared the same ideals as the Old Satan Faction. Lord Mammon would've killed his own daughter had Revan Lucifer not arrived and killed him.

Revan had known that another war would further lead to his race's extinction, and that counting the Great War was out of the picture, so he declared for the Anti-Satan Faction with those loyal to him joining him. During the finals days of the war, he fought against his brother, Rizevim Livan Lucifer, and defeated him, casting him out of the Lucifer Clan along with those loyal to him. After the war ended with the Anti-Satan Faction's victory, Revan got to work on eradicating the Old Satan Faction loyalists in the Lucifer Household, leaving only those loyal to him and the Anti-Satan Faction left. Revan's goal was to cleanse the Household of the bad blood and make sure it would do good for futre generations.

A House shouldn't fall to ruin and be remembered as a enemy simply because of it's members.

Revan and Sarlith fell in love with each other, and it wasn't long before they were married which was a big spark of hope for Devil kind as many knew how powerful both Devils were, and a child from this union would be even more powerful. However, due to the low birth rates, Sarlith didn't get pregnant right away.

But after many tries over the years, the news soon came that Sarlith was pregnant...

"AHHHHH!" A woman's scream filled the maternity ward in the hospital as she laid on a bed, currently giving birth with the doctors and midwives around her. The woman was quite beautiful, with a beauty that could rival Goddesses of beauty like Aphrodite and Freya, heel she could possibly rival Lilith herself in terms of beauty. She had long dark hair that fell down to her back, though it was clinging to her due to the sweat. She had dark green green eyes, a voluptous figure that wasn't ruined by the baby bump, and she was clad in a hospital gown.

"You're lmost there, Lady Mammon. Push!" One of the doctors encouraged her.

"I AM PUSHING! HOW ABOUT YOU TRY YOUR HAND AT THIS?!" Sarlith mammon shouted at the doctor with a furious expression but it broke into a painful grimace as another contraction hit.

"Calm down, dear. They are just doing their job." The voice of her husband, Revan, caused her to snap a glare at him.

Revan Lucifer was a handsome man who looked to be in his twenties, though he was much older than that, had long silver hair that he had tied into a ponytail, hazel eyes, and was dressed in casual clothing.

"YOU! YOU DID THIS TO ME YOU BASTARD!" Sarlith shouted with her teeth gritted into a snarl. "THIS IS YOUR FAULT!"

"You were the one that was so determined to have a child." Revan muttered.

"WHAT WAS THAT?!"

"Nothing dear!"

Revan just held her hand tightly, regardless of her trying to break it. He wanted to comfort her, to reassure her, and try to reassure himself since he was scared. They had tried many times for a child, but the low birth rates made that impossible. It was a blessing when Sarlith finally ended up pregnant, but both had been scared as they knew about the dangers of childbirth, some of which did not leave Sarlith comforted and reassured. She didn't want her first, and possibly only pregnancy, to go badly.

"Okay, I see the head!" The head nurse called as she looked between Sarlith's legs before looking at the sweating mother-to-be. "Just one more push! You're nearly there!"

Sarlith set her expression into a determined one despise the pain before she closed her eyes, scrunched her face tightly and screamed as she gave one last push.

And then, the sound of a baby crying silenced all.

Sarlith let out an exhauted sigh and her head fell back onto the pillows. Revan kissed her forehead and comforted her with soothing words as one of the doctors cut the unbillical cord and wrapped the baby up in a blanket before smiling at the newly crowned parents.

"it's a boy."

"A boy..." Sarlith whispered weakly, which was to be expected since she did go through five hours of labour. She looked at her husband with tears in her eyes. "We have a son..."

Revan gave a watery smile, tears in his own eyes as well, tears of joy that is. "We do."

The baby was given to the mother and Sarlith held her son close, her face immediately melting into a soft, motherly expression as she cooed at her baby. "My baby boy..."

Their son had his eyes shut, obviously, and they could see small tuffs of black hair, which means he'll be getting his mother's hair when he's older. His eyes opened a little, and the happy parents saw hazel eyes. He'll have the same colour of hair as his mother, and he'll have his father's eyes.

"What should we name him?" Revan asked, looking at his wife while gently caressing his son's cheek with a finger. "I know you wanted to name the baby if it was a boy..."

Sarlith was silent as she stared down at her son for a few moments before a smile grew on her face as a name came to mind.

"Damian. Damian Mammon-Lucifer..."

And that's it for the first chapter everyone. I hope you all enjoyed it and are looking forward to reading this new rewritten version of Lucifer of Mammon. Don't worry, I won't be going for another rewrite. This story is sticking around for good, and that I promise. I know that doesn't mean much, but I vow it will remain here no matter what difficulties I feel.

Now for the harem. Right now, I'll only reveal the DxD women in it, since I still need to plan the Peerage members. You can choose which women can be in it and what piece they'd suit.

Harem: Rias Gremory, Akeno Himejima, Raynare, Kalawarner, Yubelluna, Xuelan, Karlamine, Tiamat, Yasaka, Kuroka, Gabriel, Grayfia Lucifuge, Serafall Leviathan, Venelana Gremory, Kiyome Abe, Seekvaira Agares.

Peerage:

King: Damian Mammon-Lucifer.

Queen: Unknown

Knight: Unknown

Knight: Unknown

Rook: Unknown

Rook: Unknown

Bishop: Unknown

Bishop: Unknown

Pawns: Unknown