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

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[Ding!]

[Detected a compatible fusion reward. Would the host like to proceed with the fusion?]

[Fusion Targets: Crimson and White Dragon Dance & Black Evil Dragon King's Soul.]

[Ding!~]

[Black Evil Dragon King's Soul fusion successful!]

As the crimson dragon's phantom faded, Akira's Sacred Gear now housed a complete dragon soul. At this point, a dragon king-level soul wasn't particularly useful. However, it could still be given to trusted allies, allowing them to wield the Sacred Gear's power.

"Sairaorg also managed to subdue a berserk Longinus, but he probably didn't do it the same way I did," Akira mused. "Even the weakest Longinus, when fully activated, possesses at least the power of a Super Devil. Sairaorg is strong, but without using a Longinus, he couldn't possibly match that level of power. Either he didn't defeat it through force but instead used his mother's lineage and affinity with lions to calm the berserk Sacred Gear, or he wasn't facing a fully activated Longinus."

As he pondered, a teleportation circle lit up beneath Akira's feet.

[Sona, I'll leave the rest to you. Is that alright?] Akira glanced at Sona before departing.

[Yes, leave it to me, Akira.] Sona nodded.

Since Akira hadn't chosen to hide his strength, she had her own methods to handle the aftermath. It seemed that Ms. Hayasaka would be quite busy for a while. After all, her relationship with Akira hadn't been exposed to the public yet, and many who wanted to contact Akira would have to go through Hayasaka.

[By the way, Tsubaki will probably show a completely different side of herself tomorrow, won't she?] Sona thought to herself, fully aware of what Akira and Tsubaki would be doing after leaving.

[An hour... no, two hours. I'll give them two hours before I go find Akira.]

[I'd like to see Tsubaki's more vulnerable side. If it's Akira, I'm sure he can bring that out in her.]

With that thought, Sona smiled and began restoring the damaged terrain while erasing the memories of any ordinary humans who had witnessed the event.

Meanwhile, just as Sona had predicted, Akira and Tsubaki were already lost in their own world.

Tsubaki's golden-brown eyes were filled with tenderness as she gazed at the young man before her. Gone was her usual cold and reserved demeanor; the warmth and gentleness she showed now were her true self.

"Tsubaki," Akira whispered into her ear, "can you repeat what you just said to me?"

This was the first time Akira had heard such a passionate confession from a girl, especially from someone like Tsubaki, who always seemed so aloof and composed. The contrast was incredibly appealing to him.

"Of course, Akira. If you want to hear it, I'll say it as many times as you like," Tsubaki replied softly.

If it was Akira's request, she would comply without hesitation.

"Akira, I... I've liked you for a long time," the black-haired, glasses-wearing beauty murmured, her cheeks flushed.

"I've liked you... liked you... liked you..."

"No matter how many times I have to say it, I'll never hesitate to tell you... I love you."

Tsubaki's eyes lingered on Akira's flawless features, his slightly protruding Adam's apple, and finally... his parted lips.

"Akira, I love you too," Akira replied, though his tone carried a hint of apology. "But I'm sorry. My feelings for you might not be as intense or deep as yours are for me."

Akira was fully aware of this fact.

However, Tsubaki herself knew this as well.

"It's alright, Akira. Just having a part of your attention, being able to help you even a little, is enough for me," Tsubaki said with a gentle smile.

Having been a reincarnated devil for so long, she had no illusions about monopolizing a man's affection. Especially not someone like Akira, who had already transcended the boundaries of ordinary existence.

"Akira, just hearing you say 'I like you too' is enough to make me happy."

Tsubaki reached out, intertwining her fingers with Akira's, and moved to sit on his lap. As her school uniform skirt swayed, her eyes fluttered, and her black thigh-high socks nearly slipped off due to her curling toes. In the end, Akira helped her pull them back up.

Clearly, Akira was part of the "keep the socks on" faction.

In fact, when he had contracted Saber, he had even insisted she keep her armor on. This had earned him more than a few "pervert" comments from the embarrassed Saber, which only served to excite him further.

The black thigh-high socks accentuated Tsubaki's plump, fair thighs.

"By the way, Tsubaki, you accepted the Sacred Gear transplant to get stronger, right?" Akira asked as he caressed her smooth, healthy thighs.

"Yes, that's right," Tsubaki replied, biting her lip. "Sona recently told me she's reached the level of a Maou. As her Queen, I can't afford to fall too far behind her."

"In that case, let me give you a gift," Akira said, summoning a black "Bishop" piece.

The evolved second-stage "Irregular" pieces had gained new effects. Their quantity had become "pseudo-infinite," with three "Pawn" pieces generated daily. Additionally, "Pawn" pieces of equal value could be combined to create any piece except the "Queen." This meant Akira could use three "Pawn" pieces to create a "Bishop" or "Knight," and five "Pawn" pieces to create a "Rook."

If Akira's pace of recruiting subordinates slowed, he planned to replace all "Pawn" pieces with other pieces to enhance his servants' specialized abilities.

"Is this... a Devil Piece? No, it's not. Devil Pieces are crimson," Tsubaki said, looking at Akira with confusion.

"Correct. This isn't a Devil Piece. It's an evolved 'Irregular' piece, enhanced by my abilities. Sona's power skyrocketed after absorbing one of these," Akira explained.

"I see... but I've already absorbed Sona's 'Queen' piece," Tsubaki said, her expression troubled.

"It's fine. My pieces have surpassed Devil Pieces. Even if you've already absorbed a Devil Piece, you can still use mine," Akira reassured her.

"I understand."

"Alright, Akira. I'll leave it to you. I hope to grow stronger with your piece. I want to stay by your side and Sona's!" Tsubaki's voice was filled with determination.

To her, accepting Akira's piece was akin to pledging eternal loyalty, a contract that demanded utmost seriousness.

"Good. Just relax, Tsubaki."

Under Akira's control, the black "Bishop" piece flew toward Tsubaki's chest. A radiant black light filled the room as the piece merged with her.

Almost instantly, Tsubaki broke through the High-class Devil stage, becoming an Ultimate-class Devil! Her power continued to surge, approaching the peak of Ultimate-class!

Along with her power, Tsubaki's physical body also underwent evolution. Her aura became more refined, her skin softer, and her energy levels higher. Even her strength increased significantly.

"Ah!"

Feeling Tsubaki's enhanced strength, Akira inhaled sharply and tightened his embrace.

"Almost there... just a bit more."

Akira sensed Tsubaki's power and knew she was on the verge of breaking through to the Maou level. All she needed was a final push.

A white glow enveloped Akira, emanating from his most primal ability—[Evolution Power]! It was this power that allowed Akira to be embraced by the scattered energy of dimensions and the power of worlds. It was this power that had allowed him to evolve his bloodline into that of a "High-Dimensional Succubus" during his countless years in the dimensional void.

Though Akira didn't fully understand the relationship between his [Evolution Power] and his bloodline, he knew how to maximize its effects. The longer and more intimately he was in contact with someone, the greater their potential for evolution. Thus, Akira maintained close contact with Tsubaki to facilitate her evolution.

"Whoosh!~"

Under the influence of evolutionary power and dimensional energy, Tsubaki's black devil wings unfurled as she clung tightly to Akira. As she fused with the "Bishop" piece and endured the baptism of dimensional energy, her eyes rolled back, and she collapsed onto Akira.

"Success."

Feeling Tsubaki's new level of power, Akira let out a sigh of relief. Due to her lesser fortune compared to Sona, Tsubaki's strength stabilized at LV 201 (Low-tier Maou), slightly below Sona's LV 210. Still, breaking through to the Maou level was an achievement. Being stuck at the peak of Ultimate-class would have been far more troublesome.

[Ding~]

[Detected fortune absorption. High-Dimensional Succubus Bloodline activated.]

[Fortune absorption target: Tsubaki Shinra.]

[Ding!~ Fortune absorption successful.]

[Host level increased by 5. Current level: 241 (Maou Peak).]

Meanwhile, as Akira took Tsubaki away, the town was in chaos. Many had witnessed Akira's battle with the evil dragon's remnant soul. His overwhelming power, capable of suppressing the evil dragon with ease, was at least at the level of a Super Devil!

Reactions varied among the factions. The most excited... was Vali!

"Red Dragon Emperor! It's the Red Dragon Emperor! The intel was right! That bastard is the Red Dragon Emperor!"

Vali immediately activated his Balance Breaker, preparing to rush to the scene.

However, in the next moment, a chilling wave of ice froze him in place.

"Crack!~"

With little effort, Vali broke free from the ice. But instead of getting angry, he meekly turned to the figure beside him.

Standing next to Vali was a golden-haired beauty. Her long, flowing hair, icy complexion, and natural grace made her seem like a masterpiece of nature. Her name was Lavinia, the Ice Princess—Lavinia! She was the wielder of the Longinus "Eternal Ice Princess," a true Longinus user.

Normally, Lavinia was a somewhat absent-minded girl. But now, her gaze was sharp as she looked at Vali.

Feeling the change in Lavinia's demeanor, Vali halted his pursuit of his rival.

Muttering to himself, "A real man doesn't fight with women," Vali spoke up weakly.

"Big sis... isn't it a bit unfair to interfere with the destined battle between the Red Dragon Emperor and the White Dragon Emperor?"

"Vali, are you saying you plan to attack Akira?" Lavinia asked, her smile gentle.

"Well... not attack, just test his strength. I think, given his current power, he must have already activated 'Juggernaut Drive.' I want to see how deep his power goes."

"Vaaaaaali~"

Lavinia drew out his name, her smile growing even more tender.

"Alright, alright! I get it! No 'Juggernaut Drive,' okay? I won't go all out against him!" Vali lowered his stance.

"Vali, is this how you treat Akira?"

"Akira has worked so hard... and yet, someone he once helped now wants to challenge him..."

"When did he ever help me?!" Vali protested.

"Vali, you're right. Akira didn't save your life, but... he did provide genuine assistance, didn't he?"

"Moreover, if it weren't for Akira's intel, we would have suffered heavy losses in the battle against the Khaos Brigade."

"This debt of gratitude is almost as significant as a life-saving one, don't you think?"

Lavinia made it clear... General Akira's kindness was inexhaustible.

"Fine, fine! I get it! He seems to be in a fight right now. I'll go help him, okay?" Vali lowered his stance once more.

"That's acceptable," Lavinia nodded.

"Whoosh!~"

With Lavinia's approval, Vali sped off, disappearing in an instant.

Half a minute later, Vali returned, looking slightly embarrassed.

"Big sis... if I told you Akira left with a woman... would you be mad?"

Note: So far this story is published up to chapter 145 on my patreon, go check it out and remember that if we reach the goal of 130 power stones I will publish the next chapter.