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

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However, Medea was not the only one with tricks up her sleeve. Akira was no pushover either.

[Boost!]

The gauntlet of the Red Dragon Emperor appeared. After absorbing the chess piece, Medea's true Servant form was pulled into this world. Now standing before Akira was Medea's true self, possessing the power of an ultimate-class demon.

As her waist lowered, the purple-haired witch's eyes rolled back, her delicate toes, painted with light purple nail polish, curled up adorably, making her both cute and enticing.

[Ding!]

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

[Energy absorption target: Medea.]

[Ding! Energy absorption successful.]

[Host level increased by 14 levels. Current level: 170 (Mid-tier Ultimate-class Demon).]

Tonight, Akira learned a lot. Besides the rewards from Sola-Ui's check-in, he also mastered the complete set of divine-era magecraft and significantly boosted his level. Reaching the level of an ultimate-class demon marked a brand-new stage for Akira.

The next day, everyone was quiet. During the day, almost all Servants refrained from causing trouble. Thus, Akira decided to visit the Einzbern Castle.

As soon as he entered the castle grounds, Saber and the others noticed his presence.

"Miss Saber, long time no see," Akira greeted, observing her. With her golden hair and emerald eyes, Saber's beauty was undoubtedly top-tier. Her only flaw was her figure, frozen in eternal youth due to her time being halted. But... that wasn't necessarily a bad thing. After all, flat chests were a rare resource.

"Akira? What are you doing here?" Saber looked at him with a guarded expression. Perhaps because she had memories of the future, having heard about Akira from Sakura and Illya, she was naturally wary of him. According to the records of the parallel world, Saber had only met Akira once—when he and Illya returned to find Irisviel. After that, Saber had to endure days of hearing about Akira from the others.

[That bastard Akira, once I get the Holy Grail, I'll help Sakura punch him hard!] From Rin's perspective, Akira was an irresponsible scoundrel who saved people halfway and then ran off.

[Sister, don't be like that... Akira is someone who could become my father, or even your father!] In Sakura's eyes, Akira was the hero who saved her from her suffering and the perfect candidate to be her father.

[Sakura! You're wrong! I'm the one who's Daddy's daughter! The one who brings Akira back... can only be me!] In Illya's eyes, Akira was the one who saved her and Irisviel. To bring Akira back, Illya was willing to do anything.

As for Saber, her impression of Akira was completely different from the three families. Previously, Saber's impression of Akira was that of a mysterious, handsome enigma. Now, her impression had shifted: the source of world change, the master of the Twelve-Winged Fallen Angel, and the invader of the world. His status had clearly risen, but this only made Saber more cautious.

"Don't be nervous. I'm here to discuss something with Kiritsugu Emiya," Akira said, glancing at the castle. Hmm, he wasn't here.

"You're looking for Kiritsugu?" Saber frowned and immediately contacted him.

[That outsider is looking for me? Fine, bring him to the basement.]

Kiritsugu remained silent for a few seconds before responding.

[Saber, bring him to the basement.]

[If he tries anything, use the same move as yesterday to destroy the Einzbern Castle.]

[Since he doesn't seem hostile, let's meet him.]

After hearing Kiritsugu's voice, Saber relaxed slightly.

"Come on, Akira. I'll take you to Kiritsugu."

"Sure, I know he's not in the castle right now," Akira nodded.

"Right. After seeing your firepower yesterday, Kiritsugu had everyone split up. Only Jeanne and I are in the castle now."

Since everyone had memories of the future, the fact that the Einzbern Castle was Kiritsugu's base was exposed. Thus, Kiritsugu had no choice but to abandon the castle.

"Agumon!"

A golden light flashed as Agumon flew out of the contract seal.

[Akira, I want to act alone for a bit. Is that okay?]

"It's fine, but what are you planning?"

[Last night, that holy maiden only accepted your chess piece but hasn't absorbed it yet. I want to convince her to become your servant.]

The holy maiden referred to Jeanne.

"Are you sure?" Akira was surprised that Agumon wanted to persuade Jeanne.

[I'm more than 90% confident.] Agumon replied.

"Alright, then go ahead."

[Okay, I'll help you get a powerful servant. I can feel that Jeanne has a lot of potential. Once she becomes your servant, she'll be much stronger than before.]

Akira raised an eyebrow. Wow, Agumon could even use the term "potential." He had never told Agumon about the concept of "absorbing broken chess pieces to increase potential." It seemed Agumon had deduced this information on her own. As expected of his Agumon, truly a being with power beyond this world.

Soon, under Saber's guidance, Akira arrived at a small villa near the Emiya residence. All the Servants who participated in the Holy Grail War ten years later knew that the Emiya residence was also a safe house. Thus, Kiritsugu couldn't stay in the already exposed Emiya residence, waiting to be attacked.

"Creak—"

The door opened gently, and a haggard man walked out. Kiritsugu's eyes were sunken, his beard unkempt, and his gaze lifeless, as if he hadn't slept all night.

"Did you not sleep last night?" Akira couldn't help but ask.

"Ever since I learned about the future, I haven't been able to sleep," Kiritsugu's voice was hoarse.

"Is that so? You're quite dedicated."

Akira walked into the living room, picked up the teapot, and poured some tea leaves into it. However, he wasn't using Kiritsugu's tea but a special blend from the underworld of the DxD world.

"Gurgle, gurgle, gurgle—"

Using Agumon's flame ability and the time manipulation of the Underworld, Akira quickly brewed a pot of tea.

"Care for a cup? I don't want you collapsing from exhaustion while we talk."

Kiritsugu eyed the teacup but hesitated to drink. Akira knew what Kiritsugu was thinking and took a sip first to show it wasn't poisoned. However, even after Akira drank, Kiritsugu still didn't touch the tea, simply staring at him. This was the first time Akira had been stared at so intently by a man, and it gave him goosebumps.

"If he won't drink, Saber, how about you?"

Akira shook his head and offered the tea to Saber.

"Thank you."

Saber didn't hesitate, kneeling on the floor and picking up the teacup from the low table.

"Sip—"

The golden-haired maiden slowly drank several sips.

"Kiritsugu, I think you can drink it safely. This tea is quite refreshing."

Kiritsugu glanced at Saber, then deeply at Akira, before finally picking up the teacup. A few seconds later, Kiritsugu set down the cup and couldn't help but close his eyes.

"Good tea."

Kiritsugu's compliment was genuine. After drinking the tea, his fatigue had diminished by over 90%.

"As expected of someone from beyond this world. I shouldn't be surprised by anything you bring out."

Kiritsugu had already learned about Akira's identity from Saber. He also knew that it was because of Akira that this world was moving in a direction different from what he remembered.

"Akira, why have you come to see me?" Kiritsugu cut to the chase, his voice low.

"For the future you desire."

"Huh?"

Kiritsugu frowned. What did Akira mean by "the future he desired"?

"Kiritsugu, since you've let me in, there's no need to play dumb, right?"

"Well..."

"It's not playing dumb. I roughly understand your meaning, but I don't know how far you plan to go."

As he spoke, Kiritsugu's expression remained calm. Akira's words indicated that he was here to propose a collaboration.

"How far do I plan to go, huh..."

Akira set down his teacup and pondered for a few seconds.

"I just want to make up for some regrets and fulfill some selfish desires."

"You could call it a demon's hobby of collecting treasures."

"Except, the treasures I want to collect... are people."

"You want... Irisviel..."

Kiritsugu's eyes were unreadable. He had already figured this out. If it weren't for this, Akira wouldn't have gone to such lengths to approach them.

"Not just Irisviel. I want Saber too."

Saber pursed her lips and silently took another sip of tea. In truth, she had already sensed this. The reason Akira had said those things to her was to convey that "you, as a native of this world, cannot resist the world's will. If you want to achieve your wish, you must rely on me."

However...

What did "want" mean? Saber couldn't quite understand. Perhaps... it meant becoming Akira's subordinate? If Akira truly had the power to change history, Saber wouldn't mind becoming his subordinate. She had become a Servant to fulfill her wish, and the man before her possessed the power to expel the world's will, standing on equal footing with Alaya, if not surpassing it. If becoming Akira's subordinate could help her achieve her wish, Saber was willing to do so.

After declaring his desire for Saber, Akira heard the system's notification.

[Ding!]

[Congratulations, host, for triggering a villain check-in!]

[Check-in Level: Gold.]

[Check-in Type: Event Check-in.]

[Check-in Event: The Defeat of the King of Knights.]

[Requirement: Defeat Saber in a direct confrontation, making her lose the will to resist.]

Akira narrowed his eyes. Defeating Saber wasn't difficult, but making her lose the will to resist was another matter.

"Even if I defeat Saber in a direct beam struggle, it won't necessarily make her lose the will to resist."

"Unless... I break through her strongest defense..."

That is... Avalon.

Realizing this, Akira immediately contacted Agumon.

"Agumon, have you finished what you were doing?"

[Almost done, but Jeanne is still hesitating. Do you need something?]

"Nothing major. I just need your help in a fight."

Agumon didn't ask for details and returned to Akira's side within seconds. Her trust in Akira needed no explanation.

On the other side, after hearing Akira's declaration, Saber puffed out her cheeks in dissatisfaction.

"Mr. Akira, I am not a tool or your trophy."

Saber was a bit angry, reverting to the formal "Mr. Akira."

"No, Saber, you misunderstand."

Akira took a sip of tea.

"You are my trophy."

"Not just you. This entire separated world is my trophy."

"After being cut off from the world's will, this world can no longer return to its original state."

"Without the world's will, what can sustain this world's existence?"

Saber and Kiritsugu fell silent. After all, the world's will had truly been expelled. The man before them was someone who could expel the world's will. His status was beyond their comprehension.

With that, Akira looked at Saber.

"Saber, I know why you're more confident now."

"Your scabbard, Avalon, has returned, hasn't it?"

"That's right."

Saber's expression tightened.

"In that case, how about a little game?" Akira smiled playfully.

"A game?"

Saber frowned. Akira's "game" likely meant a fight.

In Agumon's mirror dimension, Akira and Saber faced each other. Akira was right. Saber was much more confident now. With Avalon in her possession, she was confident she could defeat the sea demon Yuhai from before!

"Mr. Akira, if you claim to have this world as your trophy, why do you still want to fight me?" Saber asked.

"Exactly, since I already have this world, why would I need to fight you?"

"However, Miss Saber, you don't seem to fully grasp the reality."

"Thus, to shatter your last bit of fantasy, I need to demonstrate this truth to you."

"In other words, you want to defeat me, even with Avalon?"

Saber wrinkled her nose. It wasn't that she was arrogant. Avalon truly had no record of defeat.

"Saber, you're still too naive." Akira shook his head.

"There's no such thing as absolute defense or absolute offense."

"All that exists is the crushing superiority of a higher existence over a lower one."

"The reason Avalon seems invincible to you is because it operates on a higher plane of existence."

"But even the concept of a 'world' pales in comparison to power that transcends worlds!"

Saber raised her holy sword, ready for battle. She had already placed her hopes on Akira, the outsider who could help her achieve her wish. If Akira couldn't even break through Avalon, then...

"In that case, please show me your power, Mr. Akira!" Saber's magical energy surged, forming a visible aura around her.

[Agumon!] Akira called out to his trusted partner.

[Understood, Akira!]

A golden light flew out from the contract seal. However, Agumon didn't take on her usual form. Instead, she transformed into a weapon in Akira's hand.

[Armament Transformation!]

[Sacred Armament: The Holy Spear That Pierces the World!]

Note: So far this story is published up to chapter 110 on my patreon go take a look and remember if you reach 70 stones of power I will publish the next chapter.