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

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Watching Akira and Seekvaira entangled in front of her, Grayfia's calm silver-gray eyes flickered with a hint of surprise.

She remembered that Akira and Seekvaira had only just met recently, right? How had they already reached this stage?

Glancing at Katarea lying on the ground, Grayfia gradually understood.

So that's how it was.

It must have been that Akira and Seekvaira had defeated a powerful opponent together, and during that time, their feelings had rapidly deepened, leading to this.

...

Akira noticed Grayfia's arrival, but he didn't push Seekvaira away. Instead, he continued to be intimate with her right in front of Grayfia.

As for Seekvaira...

She had never been able to voluntarily exit her state of enchantment. It was always Akira who ended it.

And so, Akira and Seekvaira remained entangled in front of Grayfia for over ten minutes.

It wasn't until Akira confirmed the information he wanted that he finally released Seekvaira.

The reason Akira did this was to verify the information he had received from Hayasaka Nao.

Hayasaka Nao had told him that Grayfia had once wanted to adopt him as her foster son, held a high level of goodwill toward him, and might even harbor motherly feelings for him.

But just now, Akira had obtained a completely opposite result.

After seeing Akira and Seekvaira being intimate, Grayfia's eyes had never shown any trace of "relief" or "happiness."

On the contrary, Akira saw "relief," "helplessness," "anger," and even... "jealousy" in Grayfia's eyes.

For a moment, Akira wondered if he had misread that flash of jealousy.

...

Seeing that Akira had finished, Grayfia finally spoke.

"Lord Akira, Lady Seekvaira, good day."

"I heard from Lady Rias about the attack on your residence, Lord Akira."

"After examining the traces of the spatial magic, I reverse-engineered the teleportation spell and arrived in this alternate dimension."

"However, it seems you had already defeated the enemy before I arrived."

"Impressive, truly impressive."

"To defeat a terrorist with the strength of a Maou-class... It seems Lord Akira truly has the ability to help Lady Rias resolve her engagement."

Grayfia deliberately brought up "Akira helping Rias resolve her engagement" in front of Seekvaira.

But Seekvaira showed no reaction.

"Thank you for the praise, Silver-Haired Queen of Annihilation. Seekvaira is honored."

After saying this, Seekvaira nestled into Akira's arms, her face once again blooming with a blissful smile.

...

Grayfia stared at Seekvaira, her brow unconsciously furrowing.

She hated this feeling—the feeling of something that belonged to her being taken away by someone else.

Akira.

From the very beginning, he had been hers.

After Akira absorbed Leviathan's blood and reincarnated as a devil, she had thought she had let go, that she had started treating Akira as a person rather than an object.

But now, Grayfia realized she had been wrong. Terribly wrong.

She had merely convinced herself that she had given Akira freedom.

In reality, her emotions were far more complicated.

Toward Akira...

She felt the relief of setting him free.

The guilt of not being able to restore his talent.

And the reluctance to let him disrupt her relationship with Sirzechs.

These emotions intertwined, creating the situation where Grayfia, despite wanting to adopt Akira, could only let him drift alone.

...

Akira noticed the way Grayfia was staring at Seekvaira and felt increasingly uneasy.

What exactly was Grayfia's relationship with him?

Foster mother and son? Impossible.

Lovers? Even more impossible.

Then what was it?

...

As Akira pondered, Grayfia turned her gaze to Katarea.

"Lord Akira, may I take custody of this terrorist leader from the Old Maou Faction?"

"You and Lady Seekvaira defeated this terrorist together. I will ensure you receive the rewards you deserve."

"..."

"Very well, I'll thank you in advance," Akira replied calmly.

Of course, that was all he could say. After all, Akira didn't have the authority to deal with terrorists.

However... Akira had no intention of sitting idly by and letting Katarea fall into Grayfia's hands.

...

Under Akira's control, Katarea successfully woke up.

"Huh!?"

Katarea opened her eyes and, upon seeing Grayfia approaching her, nearly popped them out of her head.

The Silver-Haired Queen of Annihilation!? When did she get here!?

I need to escape, now!

Thinking this, Katarea quickly stood up and began casting a spatial spell to flee.

"Do you really think... you can escape from me?"

Grayfia snapped her fingers, and in the next moment, the spatial spell at Katarea's feet crumbled.

Watching the silver-haired maid approach, Katarea panicked.

She absolutely did not want to fall into Grayfia's hands!

As if responding to Katarea's desperation, the serpent attached to her body unleashed a surge of immense energy!

"ROAR!!~"

The Chaos Dragon Serpent roared.

In an instant, Katarea's power surged to a level beyond that of a Maou!

This boost far exceeded Katarea's limits.

Maintaining this state, even the slightest movement made her feel as though her body was about to tear apart!

"Is it really worth going this far?"

Grayfia shook her head and continued walking toward Katarea.

No matter what spell Katarea cast, Grayfia was confident she could dispel it before it took effect. This was the absolute confidence of a God-class powerhouse!

However, things did not go as she expected.

"HAHHHH!!~"

[Serpent That Devours the World!]

Pushing her body to the brink of destruction, Katarea launched an all-out attack on Grayfia.

The massive "Serpent That Devours the World" swept through the surroundings.

To protect Akira and Seekvaira behind her, Grayfia cast a barrier to block Katarea's attack.

...

And then.

Right before Grayfia's eyes, Katarea's figure began to fade.

Throughout this... Katarea hadn't used any spells!

"The ability to traverse space without using any spells!? How is that possible!?"

For the first time, Grayfia showed genuine surprise.

Wasn't this ability unique to her?

It had taken her over a century with Akira to develop dimensional abilities under his influence. How could Katarea have them too?

Could it be because of Ophis?

Because Ophis was born in the dimensional gap, could she grant others the ability to move freely between dimensions?

If it wasn't because of Ophis...

Grayfia turned and gave Akira a deep look.

If it wasn't Ophis, then it could only be because of Akira.

Could it be... that the Old Leviathan Faction had stolen some ability from Akira when they kidnapped him?

Grayfia immediately dismissed the possibility that Akira had actively helped Katarea.

After all, there was no realistic basis for Akira to aid the Old Maou Faction.

Katarea had likely come here to kill Akira. Why would he help his enemy escape?

...

With Katarea's successful escape, Grayfia saw no reason to stay.

Soon, she sent Akira and Seekvaira back to Akira's home.

At the entrance of Akira's house.

Grayfia's brows remained furrowed.

If the Old Leviathan Faction had truly awakened dimensional abilities, things had just become much more complicated.

"Lord Akira, take this."

After a moment of thought, Grayfia took out a silver-gray gem.

"What is this?" Akira asked curiously.

"It's a gem I created using my own abilities."

"If you're ever in danger, you can use this gem to call for me. It can bypass any spatial barriers and deliver the message directly."

"Understood. Thank you."

Akira accepted it with a polite nod.

Even if he took it, he had no intention of using it, let alone carrying it around.

Who knew if Grayfia had embedded some kind of surveillance spell within it?

...

After a few more reminders, Grayfia left.

The moment Grayfia was gone, Seekvaira threw herself into Akira's arms, pressing her lips to his.

She had been waiting for Grayfia to leave!

That woman was such an eyesore!

Why did she have to stick around and play the third wheel?

Once again feeling Akira's presence, Seekvaira was intoxicated, completely absorbed.

She didn't even notice when Akira led her back to the bedroom.

All she knew was that she didn't want to be apart from him.

Removing her glasses, Seekvaira's world became entirely different. The rational, cold demon princess transformed into an emotional, lovestruck girl.

A girl in love is blind, reckless, and uncontrollable.

Moreover, when she had kissed Akira earlier, Seekvaira's body had already been infused with the power of a high-dimensional succubus.

In the bedroom, Akira and the princess of the Agares family were tightly intertwined.

[Ding~]

[Detected energy absorption. High-dimensional succubus bloodline activated.]

[Ding!~]

[Congratulations, host has obtained: Pureblood Agares Demon Bloodline.]

[Host level increased by 20. Current level: 129 (Mid-tier High-class Devil).]

"Crack, crack, crack~~~"

Aches and tingles spread through Seekvaira's body, causing her to stretch slightly, her bones making soft cracking sounds.

The black stockings of the underworld princess lay beside Akira, the toes within them constantly flexing and curling.

Her toes clenched slightly as Seekvaira instinctively hugged the boy in front of her, her smile filled with joy and a hint of infatuation.

How much time had passed?

Seekvaira's crimson eyes suddenly widened, her toes nearly tearing through the stockings.

"Whoosh!!~"

At the same time, Seekvaira's demon wings unfurled.

Under the moonlight, her wings were smooth and radiant, like black jade.

Note: So far this story is published up to chapter 70 on my patreon go take a look and remember if you reach 60 stones of power I will publish the next chapter.