This is a one-shot I've been working on for a long time. If this is well-received, then I might consider working on a one-shot series both here and on AO3 where I will post the explicit versions.

It is a Dark Signers AU one-shot with my original character Estelle involved. You might recognize her from my "Crimson Star Priestess (New Version)" fanfic, but she's a Dark Priestess in this version.

Every character in this one-shot will somewhat be out of character due to their Dark Signers selves. They are all in their twenties.

I've also come up with a shipping name for Dark Yusei and Dark Estelle; FallenStarShipping.

The explicit version can be found on my AO3 account; Crimson_Priestess_of_Miracles.

The one-shot is in normal point of view.

Disclaimer: I do not own any Yu-Gi-Oh! 5D's characters! I only own my OCs!

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An enormous castle rested in the center of the Netherworld. It was nothing extraordinary; the dreadful exterior looked like it had been carved out of a mountain of coal, but the interior looked anything else than depressing. The inside of the castle may have a homecoming feeling, but the majority was clad in the colors of the Dark King's powerful Monster; Red Dragon Archfiend.

There was another structure not far from the castle, but it was smaller and had the shape of a temple. That's where the Dark Priestess of the Netherworld was residing and prayed to the Dark Signers' God, the Crimson Devil.

She rested on her knees in front of the statue of the Crimson Devil and moved her lips silently as she whispered her prayers to the evil God. While her eyes were closed and she was in deep concentration for the praying, she could sense a presence that had entered the temple. She quickly finished the daily prayers and opened her deep red eyes with black sclera. She got up from her knees and slowly turned around in her black dress and robe to greet the intruder.

"Fortune Lady Past", the Dark Priestess spoke calmly. "What brings you here?"

Fortune Lady Past was a magical creature that served her master, who was the Queen herself. Each Dark Signer got at least one magical creature to protect them from harm and serve them.

"Forgive me for interrupting your prayers, Dark Priestess, but the Queen has requested your presence", Fortune Lady Past replied with a low bow.

"I understand", the Dark Priestess nodded. "I shall head over there at once."

The adult and spellcaster walked to the castle, which was just a five minutes' walk, so there was no need for the Dark Priestess to summon her dragon for a ride. The castle was quiet, since the Dark King and his men had been away for a while to take care of some disturbance in the south of the Netherworld. Hence why, the Dark Queen was currently sitting on the King's golden throne clad in red rubies and black onyx. The Dark Queen's other magical creature, Fortune Lady Dark, stood next to the throne like a guard, ready to banish anyone who dared to harm the queen with her dark power.

The Dark Priestess kneeled down in front of the Dark Queen with her right hand resting above her heart while Fortune Lady Past walked to the other side of the throne to assist her older sister to guard the queen. "You've requested my presence, Dark Queen?" the Dark Priestess spoke softly.

The Dark Queen chuckled as she sat with her legs crossed. "Raise, Estelle. And, please, call me by my name when we're alone."

"Pardon my mistake, Carly", the Dark Priestess, Estelle, obeyed before straightening up.

"I've received word from my beloved King that he and the men are returning from the south", Carly began. "However, the unfortunate news is they have a few people and creatures that are wounded, so we must prepare the infirmary."

The only connection the royal couple had whenever one of them left the castle for business was by a magical creature known as Mirror Resonator. It was a fiend Monster that carried a mirror on its back that could be used as a communication device. There were only two Mirror Resonators in the castle, but the other Dark Signers had their own pocket mirrors they could use to communicate with each other, but only for emergencies.

"I understand", Estelle bowed with a hand above her heart.

"Good!" Carly exclaimed happily before she embraced herself, shivers of pleasure running down her spine. "I look forward to see my beloved king! Our men have been gone for almost three months! The bed is so cold without my Jackie! I can't wait to cuddle with him!" She grinned widely when she got an idea. "Say, Estelle, my offer still stands if you want to lend some of my toys for you and your partner."

"I appreciate the offer, but I have to decline", Estelle shook her head. "We have our own way of pleasure."

"Your sex life must be so boring", Carly pouted. "But I haven't heard words of your pet getting tired of you, so I guess all is well between you."

"I prefer not talking about my private sex life, Carly. And he's not my pet", Estelle spoke strictly, although she did her best to hold back a red blush that nearly blossomed on her cheeks. "Now, if you'll excuse me, I shall go and prepare the infirmary with the ladies."

"Oh, yes, I almost forgot about it!" Carly fake-gasped. "I was so busy thinking of how to please Jackie when we're in our bedroom. Now, shoo-shoo! Hurry and make sure to heal our men."

Estelle held back a soft chuckle before she bowed to the Dark Queen and left the throne room. Her flat sandals echoed for each step she took on the marble floor as she walked down the long corridors. She made it to the ground floor of the castle where the infirmary was located. She saw several of her friends' magical creatures standing outside of the infirmary and looked bothered. Estelle sighed deeply in disappointment. If her friends had sent their creatures out of the room, it could only mean one thing. She didn't hesitate to open the door and was greeted by a heated scene she had witnessed multiple times ever since the men left the castle.

Misty laid on a desk with paperwork scattered around her with Aki hovering above her, both of them tangled in each other's arms while they were busy kissing. They moaned loudly as drool ran down from the corner of their lips. They moved their lips like they were desperate to devour each other, Misty's hands tangled in Aki's hair. They grinded their large bosoms against each other, trying to create a friction to get release, but their robes and aprons were in the way and couldn't provide what they needed.

The Dark Priestess felt a little hot by watching the scene. Goosebumps ran down her arms and spine as she recalled the passionate nights she had with her lover before he left with the Dark King and the army. The nights have been so lonely for her, even when she played with herself under the bedsheet with the memories to her disposal.

Things started getting a little too heated between the lovers. Misty wrapped her legs around Aki's back while the redhead traced her fingertips up her partner's thigh underneath the dress, slowly reaching for its target. This was the cue for the Dark Priestess to jump in before it could escalate.

"Eh-hurrm!" Estelle cleared her throat loud enough to echo in the infirmary.

Misty and Aki jumped by the sudden noise and immediately froze in their movement. Aki looked over her shoulder and spotted the brunette standing by the threshold. Some of her and Misty's magical creatures peeked inside nervously, hoping they wouldn't get scolded by their masters for not stopping the intruder.

"Oh… It's just you", Aki sighed nonchalantly before she removed Misty's legs from her waist. "Just when things were getting good…" She soaked her fingers with the drool on her face and combed them through her hair to straighten it.

"Well, I had to stop you so we can finish the preparations for the men and their creatures to get treatment", Estelle responded, though she could feel the effect of the hot scene on her body. She pushed her thighs together to calm down the heat between them.

Aki smirked amusingly. She could tell the kissing session had affected the usual composed Dark Priestess. She skittered over to the brunette and wrapped her arms around her left arm, pulling it between her breasts. Her black and purple dress had a deep V-cut on the front, which exposed her cleavage for her prey.

The petite redhead Dark Signer pushed up on her toes and whispered in Estelle's ear with a seductive voice. "You know… We've never had a chance to sleep in the same bed…", Aki spoke softly, squishing her chest into the Dark Priestess. "I wouldn't mind sharing a bed with your boy-toy tonight…"

Estelle was barely affected by Aki's approaches. She moved her arm back and gently pushed the Dark Signer away by the shoulder. "I'm sorry, Aki, but I want to keep a monogamous relationship with my partner", the brunette said.

Aki giggled, not feeling sad for getting rejected. It wasn't the first time she had attempted to seduce the Dark Priestess. She was a predator and she loved challenges whenever she set her eyes on the target. "I'm not asking for a love relationship, you little thickhead", she said, tracing her index finger down Estelle's arm with a light feather touch, which made the brunette shudder. "We could have the same sexual relationship like what I have with Misty and Kiryu."

Misty sat up and fixed her wrinkled apron before she wiped the drool off her cheeks with her fingers. She then wiped them clean on the apron and got off the desk before quickly combing her tangled hair. "You should give up on Estelle, Aki", the blackette said as she walked over to the girls and put her hands on Aki's shoulders from behind. "We know you like being adventurous with girls in bed, but Estelle isn't interested in you." She leaned to Aki's ear and lightly nibbled her earlobe, getting a soft gasp out of the redhead's mouth. "You can join me and Kiryu tonight instead… I'm sure he would love watching a show of us tangled in the bed."

Aki turned to Misty with a burning glance in her eyes, her lips curled upward. "I'm already looking forward to it", she replied before giving the blackette a peck on her lips. "But the rules are the same; I don't want his dick inside me."

Estelle tiredly shook her head at the scene. She wasn't interested hearing the details about their threesomes with Kiryu. "Keep those things to yourselves, please", the brunette said.

"Getting a little horny again, hmm?" Aki smirked mischievously, hoping that dirty talk could convince the Dark Priestess to reconsider the idea of the redhead joining her bed with her lover.

"Shut it…", Estelle groaned and rubbed her warm forehead to get rid of the heat that had disrupted her body.

She removed her robe and long handless gloves and placed them on the back of a chair, revealing her bare shoulders and arms. She grabbed a clean black apron and tied it around her waist, now ready to treat the injured men. Aki and Misty's magical creatures finally walked into the infirmary to take their positions to assist the Dark Signers and the Dark Priestess.

Reptilianne Nyami skidded into the infirmary through a door that led to the training ground where the men, and sometimes women, practiced with weapons and even their personal creatures. "Doctor! The men have arrived!"

Aki, who was the head doctor of the Netherworld Castle, swiftly changed into her serious mode and clapped her hands to get the magical creatures' attention. "Alright, everyone! It's time to head into work! The Priestess and I will treat the fatal injured people while you take care of the rest with Misty!"

"Yes!" the creatures responded simultaneously.

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After couple of hours of treating the injured, Estelle walked back to the temple. It had been a very long day. The fatally injured men and creatures were out of harm's way. Luckily, none of them had been the Dark Priestess' lover, so she was relieved when she got the word of her partner being unharmed. The Dark King himself had returned safely with no serious injuries as well, so the Dark Queen had snatched him as soon as she found him and pulled him to their bedroom for a lovely reunion.

And by all the passionate noise the servants heard from their room was enough proof to leave them alone for the next twenty-four hours. If one would dare to interfere them… Well, you must have a death wish on your shoulder.

Estelle noticed a silver dragon standing outside of the temple, which made her tired lips twitch into a warm smile. "Stardust Dragon."

Stardust Dragon growled softly in delight at the sight of the Dark Priestess. He lowered his head to nuzzle the young woman. Estelle laughed softly as she caressed the dragon's head.

"I assume your master is inside the temple", Estelle said.

"Rawrrr…", Stardust Dragon rumbled.

Estelle chuckled and gave the dragon one last pat. "I'll take care of him. You go and join your friends. They must be worried about you."

Stardust Dragon screeched before he flapped his wings and flew towards a ravine where the dragon creatures had their nests. Estelle watched him until he disappeared by the dark horizon. She exhaled softly through her nose before entering the temple. The dual door squeaked as she stepped inside the temple. Her eyes stared at the back of a man who stood in front of the statue of the Crimson Devil at the altar. She could see the man had placed his right hand above his heart praying to the God.

The sight warmed the Dark Priestess' heart as she slowly walked toward the altar. The young man heard the soft steps on the red carpet, which made him smile as he stopped praying. He slowly turned around with his cobalt blue eyes shining among the black sclera.

"Yusei…", Estelle mumbled in joy.

Yusei was dressed in a black Dark Signer outfit with red embroidery. He wore a crop top that exposed his well-trained abdomen, a short cape that reached to the waist, a pair of tight pants, shoes, and gloves that reached the wrists. He had a red tattoo on the left side of his face, which was a mark that confirmed he was a Dark Signer.

The man smiled softly as he opened his arms. "I'm home… Estelle."

Estelle quickened her steps so she could run into Yusei's arms and give him a hug. They were both around the same height, so they rested their chins on top of each other's shoulders.

"Welcome home, Yusei", Estelle couldn't help but let some tears accumulate in her eyes as she gently caressed the back of her lover's head. "I missed you so much."

"I missed you too", Yusei replied and planted a soft kiss on his lover's neck. "It's been three long months."

Estelle slowly pushed her away from Yusei's arms and gently grasped one of his hands. "Let's make ourselves comfortable before you tell me everything."

Yusei let the Dark Priestess guide him to the far back of the temple where Estelle's bedroom was located. They entered the room, which automatically lit up by the few candles that were scattered around, giving it a mysterious atmosphere. The Dark Priestess removed her robe, gloves and sandals while the Dark Signer removed his cape, gloves and shoes before they settled down on the queen bed. Yusei sat at the edge of the furniture while Estelle sat on her knees behind him and gave him a massage. It was their routine every time Yusei came home from a long and exhausting mission.

"How did it go?" Estelle asked as she massaged her lover's shoulders. "The mission was originally going to last for two weeks, so it was quite the surprise when we heard you had to stay in the south for three months."

"The restless souls in the south were easy to deal with when we arrived", Yusei explained, relaxing his tense shoulders while the brunette massaged him. "By the time we were ready to leave, new wandering souls entered the Netherworld and they used the remnant of their powers to summon their creatures. It took a long time to defeat the creatures and burn the aggressive souls into ashes as punishment. Jack may not have looked exhausted when we returned to the castle, but he used lots of his magic to incinerate the souls before they could escape and create more chaos in the Netherworld."

"I see…", Estelle nodded as she used her fists to rub Yusei's back up and down. "This usually happens when the tainted souls of Earth have an unfortunate end and they get thrown to us instead of letting them enter the Heaven."

"It's their punishment after disobeying the law and order on Earth", Yusei added before he felt a shiver run down his spine when his lover's hands crawled to the front and massaged his abdomen, following the lines of his abs. "I missed you immensely, Estelle."

"I missed you too, Yusei…", Estelle whispered before she retracted her hands. She grimaced when she saw how dirty her hands got after that brief message. "When was the last time you had a chance to clean yourself?"

"Ten days ago", Yusei responded. "And it was with a rag I had soaked with some water from my bottle. I haven't washed my hair since I left."

The man's hair was so dirty the golden streaks were almost one with the black hair. Estelle rubbed her thumb on the grimy hair and left a trace that now showed the gold color. "Well, if you're so dirty, then you're not getting in bed like this", the Dark Priestess stated and got off the bed. "Do you have enough strength to take a bath?"

"I do", Yusei responded. "I'm exhausted, but I can pull myself together."

"Then let's take a quick shower before having a light dinner", Estelle suggested with a warm smile. "And I'll help you clean up."

That smile… It had been Yusei's motivation the whole time he was away from his lover. There were times he just wanted to collapse out of exhaustion in the middle of the battle, but he recovered after remembering he had someone waiting for him.

And now he was home with the one he had devoted his life to.

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Hot water poured from the mouth of a stone dragon into the bathtub in the middle-large bath chamber next to the bedroom. The bathtub itself was big enough to hold four adults, so there was more than enough space for the couple. Unfortunately, the couple wasn't going to take the opportunity to relax and cuddle in the bathtub today.

The reason why the Netherworld had water was it was produced by magic crystals that contained water magic. The Crimson Devil had arranged so the Dark Signers and the other occupants of the Netherworld were provided with necessary supplies to live close to the normal life they once had while they were still living on Earth before they became residents in the dark world.

Yusei sat on a stool in front of a mirror all naked, except for a towel wrapped around his waist to cover his genitals. He was busy washing his arms and legs while Estelle cleaned his back with a sponge. The Dark Priestess was clad in only a towel wrapped around her body that reached down to her thighs. The water pouring down Yusei's body quickly became murky by the dirt. The black water rippled down a drain along with the foam of the soap.

"Does it feel good?" Estelle asked while she massaged Yusei's back with the sponge.

"A lot…", Yusei hummed in relief. His eyes nearly dropped by the sensations of his sore muscles receiving care. It didn't help when Estelle snuck the sponge to his abdomen and washed his stunning abdomen with well-muscled six-packs.

"Hey. Eyes open", Estelle shook Yusei with a tug on his shoulder when she saw his reflection in the mirror. "Stay awake until we're done here."

Yusei ripped himself out of the drowsiness and rubbed his eyes. "Sorry… It's not easy…"

"Then I'll finish the rest", Estelle said before she grabbed the showerhead. "Close your eyes, but don't fall asleep."

Yusei bowed his head down before his lover soaked his hair with water. The water drops dripped down his bangs as his stiff hair became soft by the warm liquid. Estelle grabbed the shampoo and lathered his hair. The foam immediately got murky and the more she massaged Yusei's scalp, the more dirt came off. She had to repeat the procedure thrice until the foam was clean and white.

"I'm stunned by all the dirt you had in your hair, Yusei", Estelle commented while she massaged the conditioner into the young man's hair.

"Yeah, like I said, the last time I had a chance to wash myself was the day before we left…", Yusei yawned. He was ready to fall asleep on the stool in the bath chamber. Thankfully, he got a rude awakening by a shower of cold water on his back. "What the-!"

He saw Estelle's mischievous smile in the mirror as she held the showerhead. "No falling asleep, my dear", the brunette sang teasingly.

Yusei snorted amusingly and rubbed his eyes again to keep them open. "Sorry… But that was freezing."

"I'll finish quickly", Estelle nodded as she now used warm water to wash off the conditioner. The man felt relieved the shower was about to be done. It felt like an eternity and he was eager to get a good long rest under soft bedsheets and not worry about restless souls assaulting him in the middle of the sleep.

The couple dried themselves before they put bathrobes on and exited the bath chamber with their hands intertwined. To their surprise, the table had been prepared by the servants with a light meal consisting of a stew that was still steaming and freshly baked bread in a basket.

"Looks like they prepared our dinner while we cleaned you up", Estelle chuckled. "You think you can eat a little?"

"I'm starving, so it shouldn't be a problem", Yusei smiled and squeezed his lover's hand.

The couple sat down by the table and began eating after saying their prayers. Little was said between them as they were busy eating the warm meal. Estelle saw how much weight Yusei had lost during the expedition while she had washed him. The army had barely lived on dried food that was easy to store and didn't spoil so quickly. Yusei devoured the soup with ease and ate two whole bread rolls before he had his fill.

With his stomach full and body cleaned, Yusei was ready to fall asleep for hundreds of years. His eyes were dropping and his brain was about to shut down. He barely remembered Estelle guiding him to the bed and laid him down before she crawled under the bedsheets and covered both of them. The man immediately fell asleep as soon as his head hit the pillow, not even bothering of taking off the bathrobe. Estelle lied on her side supporting herself on one elbow and stared at her partner, still dressed in her robe as well. She could see the bags under Yusei's eyes, showing his exhaustion. The Dark Priestess had secretly hoped they could have a moment of passion before bed, but it was clear that had to wait until the next day.

Estelle leaned down and planted a kiss on the Dark Signer's lips. "Sweet dreams, my beloved…", she breathed against his face before she cuddled closer to Yusei and put her arm around his abdomen. She smirked against Yusei's neck as she made plans on what to do to please her lover and she was looking very much forward to it.

And she knew Yusei will appreciate it.