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

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Sona was closely intertwined with Akira.

"....."

Suddenly, an inexplicable aura filled the air, and Sona's presence intensified significantly.

"Did you break through?....A High-Class Devil?"

Sona hadn't expected to break through in such a manner.

"Sona, it's not just you. I've also broken through."

Akira also released the power of a High-Class Devil.

Although he was a High-Class Devil and Sona was now an Ultimate-Class Devil, due to his higher-dimensional bloodline, the gap between them wasn't very large.

"Is this...your ability, Akira?" Sona guessed.

Akira nodded: "You could say that. I can help others evolve. After establishing a close relationship, I can also gain some benefits from them, helping myself evolve as well."

Hearing this, Sona rested her head on Akira's shoulder for a few seconds before responding.

"Such an overpowered ability."

"Looks like Akira was born to be a pervert."

"And, if I'm not mistaken.....the reason you're so strong is because you've already been with many people....."

At this thought, Sona couldn't help but bite Akira's shoulder hard.

"Ouch...."

"Sona, actually, I only found out about this effect today."

Akira was also helpless. If he had known earlier, he would have been leveling up like crazy.

If he had gone through Diodora's dozen or so priestesses, wouldn't he have at least reached High-Class Devil strength by now?

"You only found out today...which means....."

Sona's eyes gradually brightened, and two heart shapes visibly appeared in her pink pupils.

As a result, Sona hugged Akira even tighter, so much so that her eyes rolled back, and drool began to flow uncontrollably.

This was her way of compensating for misunderstanding Akira.

However.

Soon, Sona felt that such compensation wasn't enough.

"By the way, Akira. Since you have such an ability, I can give you a special permission~" Sona said, her breath slightly unsteady.

"Special permission? What kind?"

"Permission to only recruit female servants," Sona replied with a smile.

"You mean...." Akira raised an eyebrow.

"Exactly."

"I allow you to use any means necessary to grow stronger, to progress together with me, and to achieve our dreams."

"Finally....to come to the Sitri household and marry me."

As an Ultimate-Class Devil, Sona didn't mind her partner having relationships with servants. After all, servants were just servants, not the same as the main wife.

Now that she had lost her purity before marriage, it was unlikely she would be able to marry anyone else.

So, Sona decided to bet everything on Akira.

Because.

In Sona's eyes, Akira's intelligence, courage, and strength all surpassed hers.

She believed in Akira even more than she believed in herself.

"Sona."

Akira stopped caressing Sona's black thigh-high socks and hugged her tightly.

He felt that he needed to show some sincerity as well.

....

Then.

Akira raised his hand, and the Boosted Gear instantly materialized.

"By the way, Sona, how about I give you a gift?"

"Akira, what do you mean?" Sona frowned.

"Sona, if it's discovered that you lost your purity before marriage, you can tell everyone that the Boosted Gear was my advance dowry."

"This way, no one in the Underworld will question our relationship, and you likely won't be blamed for losing your purity before marriage."

"No! I won't accept it!" Sona couldn't possibly take Akira's Sacred Gear.

"Hear me out before you decide."

"My Sacred Gear has mutated. Each dragon soul it absorbs can be shared with someone I approve of."

"While you use the Sacred Gear, I can also use it. As long as we don't exceed its power limit, we can use it however we want."

"Eh?"

"Really?"

Sona swallowed hard.

An Ultimate-Class Devil using a Longinus was completely different from a human using one!

The starting point for an Ultimate-Class Devil was the endpoint for most human Sacred Gear users!

Most Sacred Gear users couldn't even unleash 50% of their Sacred Gear's power even with "Balance Breaker."

If she and Akira could use it simultaneously, it would be like gaining an additional Longinus for their side!

"Akira!"

Holding the green jewel Akira gave her, Sona excitedly hugged him.

She saw it.

She finally saw the hope of achieving her dream!

No, not just her dream, but Akira's dream as well!

"....."

"Ah~"

Without saying a word, Akira could feel Sona's excitement through their close contact.

Sona, as an Ultimate-Class Devil, had a powerful physique, incredible strength, and an intense autonomous response.

....

Before parting, Sona gave Akira a farewell kiss, and the two spent some more time together.

Before leaving.

Sona was still reluctant to let go.

Seeing Sona so attached and entranced, Akira couldn't help but marvel at Hayasaka Naoto's exceptional qualities.

Both women had established intimate relationships with him after he awakened his higher-dimensional bloodline, but Hayasaka Naoto handled her attachment and restraint much better than Sona.

However, this was natural.

A young girl's infatuation and a mature woman's affection manifested their possessiveness in different ways.

Letting go of Sona, Akira looked into her captivating eyes and made a promise.

"Sona, within a year at most, I will come to propose."

"Okay, I'll be waiting for you, Akira."

"If possible, I hope you can also win over Rias," Sona added with a smile.

"Huh?" Akira raised an eyebrow.

"I said, I hope you can win over Rias as well," Sona repeated.

"By winning over Rias, you'll gain even more support."

"Having close relationships with the sisters of two Satans, the devils of the Underworld will see you as the chosen successor of the new Satans."

"This way, even if you ascend to the position of Satan as a former human, no one will question it."

Sona's smile was gentle. After establishing a close bond with Akira, she was able to make decisions completely different from before.

What she valued wasn't Rias's beauty, but the political significance she represented.

After all, even if Akira took Rias, Sona would still be the main wife!

As long as she was the main wife, nothing else mattered!

This was Sona's simple and unadorned way of thinking.

"Alright, I'll do my best."

After saying this, Akira turned and left.

Everything that needed to be said had been said. Akira believed that with Sona's intelligence, she would execute their plans flawlessly.

Note: So far this story is published up to chapter 42 on my patreon go take a look and remember if you reach 50 stones of power I will publish the next chapter.