In DxD Starting with Sign-Ing in as the Red Dragon

[Check Out My P4treon For +30 Extra Chapters On All My Fanfics!! And get chapters before publishing them here for free on my p4treon][https://p4treon.com/roooaaa]

===

On the other side. Outside Fuyuki City.

In the Einzbern Castle.

Akira was savoring the taste of the Einzbern Holy Grail.

After integrating the piece, Irisviel and the Holy Grail separated, and she became a truly independent life form.

Irisviel gently covered her red lips, her crimson eyes trembling as tears of emotion streamed down her cheeks.

At Akira's suggestion, Irisviel donned the Heavenly Feather Robe.

Akira's hand could easily reach her white-stockinged thighs adorned with cross patterns. He quite liked this new style of patterned stockings.

It had to be said, the Einzbern's sense of aesthetics was truly ahead of its time.

Irisviel's cascading white hair spread out, entwining around Akira's fingers.

The silver-haired, crimson-eyed maiden was still awkward in both her movements and responses, so she could only express her gratitude and dependence by pressing her hands against Akira's.

[Ding~]

[Detected ongoing plunder of fate energy. High-dimensional succubus bloodline activated.]

[Fate plunder target—Irisviel.]

[Ding!~ Fate plunder successful.]

[Host level increased by 10 levels. Current level: 190 (Peak High-Class Devil).]

[Ding!~]

[Congratulations to the host for completing a Villain Sign-In!]

[Sign-In Level: Silver.]

[Sign-In Type: Stage Event Sign-In.]

[Sign-In Event: The Seductive Demon (Irisviel).]

[Congratulations to the host for receiving the reward: Piece Advancement.]

[Piece Advancement: As the name suggests, it allows exceptional pieces to advance, enhancing their level and effects. After advancement, the exceptional piece becomes a Second Stage·Exceptional Piece, with several enhancements:

1. Strength Enhancement.

The advanced exceptional piece will undergo targeted corrections and enhancements for all races. Each time a new race is subjugated or a contract is formed with a new race, a corresponding set of correction pieces will be added. Currently, the host's pieces have been allocated and reorganized based on race.

2. Quantity Enhancement.

Apart from the special-effect pieces like Queen, Rook, Knight, and Bishop, the "Pawn" piece will automatically generate a new exceptional piece every day. A first-stage exceptional piece could only form a powerful team, but a second-stage exceptional piece, given time, can form a powerful army!

3. Stealth Enhancement.

After advancement, the piece gains invisibility and the ability to alter physical constitution. Even when examined by specialized equipment, no abnormalities can be detected.

4. Resurrection Enhancement.

Ordinary devil pieces can resurrect someone who has just died.

Exceptional pieces can bring someone back even if they have been dead for a long time, as long as the body is intact.

After advancement, the second-stage exceptional piece can resurrect someone with only a portion of the body and soul remaining.

Note: Each high-intensity resurrection will consume the host's fate energy and dimensional energy based on the strength of the resurrected individual. It cannot resurrect beings stronger than the host.]

As the exceptional piece evolved, a faint glow enveloped Irisviel, who was beneath Akira.

At the same time, Akira's dimensional energy surged, transforming Irisviel's body.

"Mmm..."

Irisviel's white-stockinged feet pressed together behind Akira, her eyes rolling back uncontrollably.

Mana surged, then... erupted, advancing!

This phenomenon wasn't limited to Irisviel; it also occurred in all of Akira's other subordinates.

"Huh?"

Illya and Luviagelita were out shopping, discussing strategies, when they suddenly felt a change.

"This is... evolution!"

Luviagelita lifted her white-stockinged sleeve, her brown eyes filled with shock.

She had already examined her body and knew she had evolved after absorbing Akira's piece.

Knowing this, she had accepted the fact that she had become Akira's subordinate.

There was no helping it—he was too strong, too handsome, and had given her a second life and immense power. She couldn't just dig the piece out, could she?

But who would have thought that after one evolution, there could be a second?

Now, there was no way to repay him. She could only heed the call of fate and offer her body and soul to this high-dimensional demon...

"Miss Luviagelita, see? I told you following Dad was the best choice."

Illya smiled, resting her chin on her hand as she looked at Luviagelita.

She also had a piece within her, so she had gained significant benefits from the evolution.

"Alright, enough chit-chat. I'm more interested in catching that girl now."

Luviagelita sipped her coffee, crossing her plump legs.

As Illya had said, it was too unfair for Rin to be the only one left out.

She had to drag Rin into this as well.

That way, she would be the senior subordinate, and Rin would be the junior, forever trailing behind her!

With the pieces entering the second stage, not only did subordinates like Illya and Luviagelita, who had absorbed the pieces, benefit, but even those who hadn't absorbed the pieces were affected!

Outside Einzbern Castle.

Saber curiously pulled out the white "Knight" piece from her pocket.

She could clearly feel the piece's attraction to her growing stronger. Her body was craving this piece!

"Saber? What's wrong? Your fighting today isn't as sharp as before."

Across from her, Diarmuid set down his spear, looking puzzled.

Today, after returning from the fate-shifting state, Saber had done two main things.

First, she released her aura, initiating a feast for kings.

Second, she fought Diarmuid.

Of course, the second wasn't something she initiated herself—it was Akira's request.

However, Saber herself was also willing to settle things with Diarmuid.

"It's nothing. I'm just thinking about some things."

Saber held the white "Knight" piece, her expression blank as she gazed deep into the castle.

That demon, Akira, was probably enjoying his time with his fiancée, Irisviel, right?

The seeds he had sown were finally bearing fruit. This was... the pursuit of pleasure by a demon.

Saber shook her head helplessly.

Unlike Irisviel, Saber retained memories from before the timeline shift.

She knew that in the original timeline, Irisviel was Kiritsugu Emiya's wife.

Though they hadn't consummated their relationship, the bond was there. 

But now.

Originally, she should have been happy.

After all, Akira had altered the timeline, cucking Kiritsugu and becoming Irisviel's fiancé.

If Akira could change this timeline, he could change hers as well.

But why... did she still feel so displeased?

[Demons... truly terrifying creatures.]

Saber knew exactly why she was displeased.

Because she, too, was a woman.

Because she had developed feelings for Akira.

Saber finally realized that a woman's attraction to a man didn't require the man to be loyal.

A woman only needed the man to be strong enough to do what she couldn't, to protect her and her children. That alone was enough to fulfill the basic conditions for bearing offspring.

On top of that strength, if the man was handsome, it would create an irresistible allure for any woman.

Saber had once believed she would never develop feelings for the opposite sex.

But now... she realized it wasn't that she couldn't, but that she hadn't been able to.

Before, she hadn't had the qualifications to develop such feelings.

She was a king, bearing the weight of Britain's nine provinces on her shoulders.

With such heavy responsibilities and no one stronger to rely on, it was impossible for her to develop romantic feelings.

In ancient times, women who menstruated could only increase their chances of survival by relying on men.

Matriarchal societies weren't ruled by women but by their brothers and uncles.

Men, with their higher mortality rates and shorter lifespans, protected women of reproductive value. The two genders cooperated, exchanging resources to ensure the survival and continuation of tribes.

No matter how strong a woman was, she would still develop romantic feelings and seek someone to rely on. It was an instinct engraved in her genes.

If such feelings didn't arise, there was only one possibility—there was no man stronger than her, no one who could conquer her.

Realizing this, Saber's mindset and demeanor underwent another subtle change.

Through her contemplation of romantic feelings, Saber came to understand human nature...

Human nature wasn't inherently evil or good.

Human nature—was natural.

Evil and goodness paled in comparison to survival.

Whether it was men using strength to plunder women or women using reproductive resources to exploit men, it was all part of nature.

Just as the rich exploited the poor, and the poor resented the rich.

These things couldn't be changed.

As a king, all she could do was reform and guide.

"Huh? Saber, you seem... different from before."

Diarmuid sensed the subtle change in Saber's demeanor.

Saber... seemed to have undergone some kind of enlightenment?

Not in terms of strength, but... in her mindset!

"It's nothing. I've just come to understand something I should have realized long ago."

Saber took one last glance deep into the castle.

When she turned back to Diarmuid, there was no trace of hesitation in her eyes!

"Now then! Come, Lancer! It's time to bring this battle to an end!"

Earlier, Saber had been distracted by Akira's activities with Irisviel inside the castle.

But now, Saber had evolved to the point where she no longer cared how many women Akira had.

If Irisviel's fate could improve by being with Akira, then there was no reason to stop it.

The same applied to her!

Inside Einzbern Castle.

Akira lay with Irisviel, gently stroking her smooth hair.

He personally experienced the benefits of the piece's advancement.

After the piece advanced, Irisviel's hair became even softer, her skin more delicate, and her stamina greatly enhanced.

"Not just Irisviel, but all my other subordinates must have undergone similar evolutions."

Akira fondly remembered the days-long battles with Seekvaira, the strongest opponent he had ever faced.

Now, with the piece's advancement, if Seekvaira could absorb his piece, she would become even more beautiful and alluring.

"Now that the Pawn piece generates one every day, there's no need to conserve pieces anymore."

With an infinite number of pieces and their stealth function, Akira decided to equip everyone on his side with exceptional pieces.

"By the way, now that the exceptional piece has evolved, its ability to bring people back has also improved. Does that mean Justeaze could also..."

Akira was the type to think two steps ahead, always planning while enjoying the present.

In fact, while solving Illya's problem, Akira had investigated the Holy Grail's situation.

Back then, his piece's abilities weren't sufficient.

But now, Akira could consider when to resurrect Justeaze.

As long as he found the Greater Grail and Justeaze's body and soul fragments, he could attempt to bring her back.

If he couldn't find the body or soul fragments, he could set up a miniature device during Saber's fate-shifting to collect the body and soul fragments, then resurrect her upon returning.

"Resurrecting the dead consumes my fate energy and dimensional energy.

"It seems that, like the fate-shifting machine, the piece's resurrection function also requires the power of my high-dimensional bloodline."

Thus, Akira lay with Irisviel, pondering future developments.

Until...

A knock sounded, and a black figure entered somewhat hesitantly.

The black figure was, of course, Maiya Hisau.

If Irisviel represented "white," then Maiya was "black."

The contrast between the two was striking.

Irisviel in her white-stockinged feather robe and Maiya in her black bodysuit made for a visually pleasing scene.

"Is it time already?"

Akira glanced at the clock.

After absorbing the piece and evolving, Irisviel's physical abilities had improved significantly, causing Akira to lose track of time.

"Yes, Lord Akira, it's time."

Maiya bit her thin lip, her usually cold and expressionless face visibly flushed.

Without waiting for Akira to prepare, Maiya moved Irisviel aside and took her place.

Note: So far this story is published up to chapter 120 on my patreon go take a look and remember if you reach 130 stones of power I will publish the next chapter.