Yo! Eisen here. This is my first Fairy tail fanfiction here so please dont flame me. I would rather have people giving me tips and encouraging me to write. This fic will be about Natsu as END. Im not a fan of a super evil natsu so in my story, he will be like a chaotic neutral type of guy. Slighlty good, Slightly bad. This will be A harem fic. Suggest the girls you liked but not too much. they might not appear on my story that much because there are so many. Ill be adding Crossover's and OC's to Natsu's demons inside Tartaros Meaning different demons except for Seilah and other characters that might show up.

Note and warning: This story contains Incest (In a way.. Natsu is a damn etherion so you better read this!)and mature contents. OP characters and OP opponents as well. AU. Expect limes.

harem list at the bottom.

please enjoy the story!

Here we are at the most secured bases of all bases in the world, Tartaros. The behemoth flying building was silent as it hovered above the clouds, hiding from the visions of the creatures living below.

Inside, was a maze and full of traps; to keep the intruders lost, while the traps kill them one by one thus breaking their morale. There are a total of 50 floors and each floors are dangerous and deadly. In the center, was the heart of Tartaros. The throne room for the Master of Tartaros. The hall was dark and the only sources of lights are the candles and torches attached to the walls and pillars; at the ceiling was a chandelier rounded with candles.

At the end of the room was the throne. A black throne made out of dragon claws and horn. Sitting at the throne, was the King/ Master of Tartaros, Natsu Dragneel. The strongest demon and the guild master of Tartaros. He has a pink spiky hair and a black light armor on. His eyes were closed and his legs are crossed, clearly enjoying the silence.

On his side, was a beautiful demoness named Seilah. Seilah's appearance is that of a woman, with her most noticeable feature being the two large gold-looking horns protruding from the sides of her head and pointing upwards. Upon her head is a white band which separates her hair, framing her bangs from her hair below the band. Worn upon her forehead is a small circular symbol with a small dot on the inside and surrounded by several dots around the top. Tied around her neck is a small white-colored strap.

Seilah's attire consists of a very revealing beige-colored leopard-printed kimono, bearing the decorative marks on her shoulders. The kimono is wrapped around her torso with a thick, decorative yellow ribbon that ties behind her back, and her outfit is complemented by thigh-high socks that reveal her heels and toes.

Seilah was staring at her master with great affection and observing his handsome face.

"Yes Seilah?" Natsu said, still not opening his eyes.

Startled, Seilah blushed instantly and quickly looked away. "A-Ano, Master.. Are you, somehow, bored?." She glanced at Natsu, waiting for his reply.

Natsu opened his eyes, revealing its deep dark red color. He looked at Seilah who had a light blush on her cheeks. "A little, why?" He replied calmly.

Seilah walked in front of him and started to loosen her kimono a little, giving Natsu a good look at her pink nipples.

"W-Would you like me to entertain you master?" She asked, trying her best to be seductive.

Natsu was still a male; demon or not. But he still have reputations to keep and has good Morales, despite him being a demon and all. So he did what every gentle men should do, pushed her back and declined kindly.

But that didn't worked out as expected, Instead of pushing her back, His hands grabbed her breasts instead, making her moan loudly.

"Master, Would you like me to undress now or would you like to tear it off and devour me?" She quickly asked while her face was burning red.

Natsu blushed a little and removed both his hands from her semi covered breasts and grabbed her shoulders.

"Seilah, you need to stop reading those smutty books of yours" He said with a commanding tone

Seilah fought back her tears, she stepped back and bowed her head "Forgive me master, I should have expected that my body was not enough for your eyes. I shall lock myself at the library as punishment." She turned around and started walking towards the exit.

Natsu sighed and massaged his temples "Seilah, stop"

Like a trained pet, she stopped walking.

"It's not like I don't like your body, Its just that we shouldn't be doing IT at this time. Onee-sama will be visiting today. I would not like to see you getting murdered by my sister." He explained to Seilah.

Seilah quickly spun around and her eyes sparkled "S-So you would finally take my virginity after her visit?!"

"Iie (no), you will be having a funeral after my visit." Someone said coldly startling the demon girl and giving her goosebumps on the process.

They both looked at the entrance and saw HER. She has a blood red eyes and has long, black hair which curls slightly at the ends, with two bangs framing her face and reaching down to her chest. She has white skin like that of fresh snow, she is slim with a curvy figure. She's wearing a long black dress and red heels. Despite being the older sibling, she is a foot shorter than Natsu. Her name is Zeira Dragneel. The black mage.

Natsu smiled nervously and stood up from his throne "Nee-sama! Welcome home! Youre earlier than I expected." He happily greeted her. Seilah quickly went onto her knees then bowed "Welcome home Zeira-sama!"

"Outoto..." She looked at Natsu, clearly not amused "What's going on here?" She asked coldly making Natsu confused.

"What do you mean onee-sama?" Natsu asked

"Why do I hear about losing your virginity with this-" She glared at Seilah who is still on her knees and facing the floor, shaking in fear.

"I would like you not to insult my subordinates, Onee-sama" Natsu warned her elder sister. On the floor, Seilah was blushing non stop 'Master defended me from Zeira-sama *doki* And he's still a virgin! *doki* *doki* *doki*'. Good thing that she was facing the floor.

"Hmph! Listen and listen good here Seilah, Natsu is mine and mine alone! Are we clear?"

"Hai!" She squeeked. Zeira raised her voice "Are we clear?!"

"Hai Zeira-sama!". Zeira smiled at the girl "Good. Now please leave us for a moment, me and MY outoto shall be talking about important matters."

Seilah stood up and bowed at both of them before leaving.

Natsu just sweat dropped at the scene "Onee-sama, you sounded liked you own my body"

"That's just silly my dearest otouto!" She teleported behind him and wrapped her arms around his neck.

"I own your soul too.." She whispered at his ear, giving him goose bumps. "And I already told you, No sama!" She pouted.

Natsu blushed at the contact and sighed "Are you here just to tease me onee-chan?"

Zeira unwrapped her arms and giggled at him "Better.. And no Natsu. I'm here to give you the authority to rule over Ishgar!" She happily announced

"Eh? Ishgar? Why?" He turned around to face her.

"Because I have a big project at Alakitasia." Her smile faded and frowned "Which means I will not be able to visit my dearest otouto.."

Natsu groaned at her "Im old enough onee-chan. You don't need to worry about me!"

"Baka.." She mumbled but Natsu heard her. "I'll miss you, you know.." she said sadly. Sometimes she wondered if Natsu ever cared about her. She suddenly felt a pair of strong arms, wrapped around her waist. She gained a light blush at the sudden move from Natsu. She was always the first one to initiate something and this is the first time Natsu did.

"I'll miss you too.." Natsu smiled and break the hug

Zeira looked at Natsu with watery eyes "fweh~!" Zeira tackled Natsu on the floor and started crying on his chest.

Natsu just giggled at his sister's behavior "Stop crying Onee-chan. Your reputation will be ruined if someone saw you crying."

"S-Screw my reputations!" She said and continued crying at his chest.

Natsu just sighed and smile. She may be the eldest but she's always acting like the youngest sibling. He wrapped his arms around her and soothe her with kind words.

About half an hour later, She finally stopped crying and fell asleep on his arms. Natsu stood up, carrying Zeira bridal style and went to his room to place her in the bed.

He came back at the throne room and sat back on his black throne. He snapped his fingers and the door of the throne room opened revealing Seilah.

She walked towards Natsu and stopped just a few feet away from him. She then bowed slightly "Yes master?"

"Set course to Ishgar." He crossed his legs "And call the Sentinel Seven. Be here at exactly one hour."

Seilah bowed again and gave him a smile "Understood Master"

Zeira opened her eyes slowly and stared at the ceiling. She sat up and rubbed the sleep off her eyes and stretched her arms while giving a cute yawn. Zeira looked around and realized that she was at her little brother's room.

She frowned again when she remembered that she was leaving for business. She then forced a smile on her face "It's for his dream." She said out loud.

Ever since they were kids, Natsu always wanted to rule the whole world. It was a childish dream, yes, but when Natsu died from an unknown illness when they were kids his last wish was for her to conquer the world for him. Zeira cried for many days and did her best to become the best and most powerful mage in the world. Sacrificing her mortality, she revived Natsu using pure etherion.

The door opened alerting Zeira.

"You're awake." Natsu smiled at her while holding a tray of food. "I thought you were hungry so I brought you food."

'Natsu.. My caring loving outoto!~ Kyaah~' Zeira started playing a strand of her black hair. "T-Thank you.." She frowned again as she remembered that after this, she will leave. Immediately.

"Hey, Onee-sama, Please don't be sad. I promise I'll visit you at Alakitasia as soon as possible." natsu said as he put the tray down on the bed.

That seemed to cheer her up as she gave him a big grin. She quickly gave Natsu a crushing bear hug earning a pained grunt from Natsu.

She broke the hug and kissed his cheek "I'll be back as fast as I can." Zeira said to Natsu while her cheeks gave a light color of pink.

Natsu just nodded and help her got up from bed. "I'm sorry but I'll be leaving now and I can't eat the food you brought me as I'm already late for an important meeting." She said sadly.

"It's alright Nee-sama, I bid you good luck!" Natsu said to her elder sister, giving her a last quick hug.

"If I ever hear that you lost your virginity from the other bitches out there in the world or any of the girls of the seven. Expect extinction.." She whispered coldly to Natsu before breaking the hug and disappearing in a black flash.

Natsu just gulped and sighed "Why is she so over protective.."

Crocus, Tenrou Island.

Above the clouds, was Tartaros hovering over the small island. Back at the throne, Seven figures was bowing to Natsu who was sitting in his throne and Seilah standing on his left side.

The first girl has unkempt gray hair, blue eyes, and wears a beret, a black jacket with the zipper only halfway closed, and a checkered red skirt. Black fingerless gloves, the left extending to her elbow, and black thigh-length boots fill out the rather revealing ensemble she wears.

"Alisa Amiela, Ready to serve lord Natsu."

The second girl has a pale-white skin, silver hair and silver eyes. She wears a gothic lolita dress with corset, a black boots and 2 black hair pins on her hair in twintails.

"Ciel Alencon, Reporting for duty." she said professional.

The third demon was a short male, he has a short spiky black hair that was covered by the hood of his over sized jacket and violet eyes. The sleeve of his jacket was so long that it was touching the floor and the bottom of his jacket ends up to his knees.

"Gima.. Ensou... here.." The hooded boy tiredly said.

The fourth girl has orange hair done in long pig tails and has golden eyes. She wears a goggles that was resting on her neck, a black sleeveless shirt under her green dress with 2 pockets, a black gloves to her left hand with 2 wrist bands, a black leggings and white boots with belts.

"Kumi Tayumi!~, Waiting for my masters orders!" Her cheery voice earned an annoyed look from Alisa.

The fifth one was holding a mechanical scythe that was bigger than her. She is a cute girl with a loli body and a long, dark purple hair and sleepy golden eyes. Her hair is tied in a long braid, reaching all the way down to her hips. She wears a skull mask in conjunction with her Grim Reaper clothing under a white hooded cloak with a black interior.

"Shini-chan. Raping master with her eyes!" She boldly said making all the girls inside the room glared at the Loli. Except for Ciel who just gave a quick glare at Shini then keeping her cool again.

The sixth one has greyish-blonde hair and pale eyes to match, He's wearing a jacket with half-length sleeves, as well as a white button-down shirt underneath it, a thin red bow around his neck, and a pair of pants and sturdy boots. The outfit is overall black, with gold accents.

"Ara Ara, Master sure is popular with the girls." He smiled at Natsu "Soma karos, How may I serve thee?"

And the last one, The leader and the most powerful out of all the sentinel seven. She has short blond hair and light green eyes. She wears a Tartaros operator uniform which consists of a sleeveless dress, a small red ribbon and a corset type vest. She also wears gloves, a pair of socks that go above her knee and a pair of red mary jane shoes.

"Everyone please be professional as we are in front of our Lord Natsu" She said coolly, then bowing her head slightly "Konomi Daiki, How we, The Sentinel seven, may help you today, Master?"

"Out of all of us, she's the most perverted.. talk about closet pervert.." Shini whispered to Kumi who just started snickering. Konomi heard that and her glare to Shini created an explosion, creating a medium size hole in the building.

The dust cleared and Shini was standing there smiling at her, her mechanical scythe in front of her that deflected Konomi's attack. "Guilty~" She sang,

"I am not!" Before Konomi can attack again, natsu's voice stopped her. "Please stop this nonsense" Natsu sighed while pinching the bridge of his nose.

"Hai!" They all said in unison. Except for one "..Hai.." A tired gima said last and slowly.

"As for right now, Nee-sama had assigned me to rule over Ishgar." He snapped his finger and a hologram of the tenrou island was shown to the seven. "I want this Island below us to be our Headquarters as we make our plan. Clear the area, If it's infested with humans, leave none alive. Understood?"

"Hai!"

"...hai.."

Stay tuned for the next chapter!

Please Review! (Lots of review = faster update) *It's like my fuel or something*

Harem list:

Zeira

Seilah

Alisa

Ciel

Kumi

Shini

Konomi

Brandish myu

Mirajane

Erza

Lucy

Lisanna

Dimaria

Mavis

Btw this happened at year x679 so Mavis is already born.

Ja ne!