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

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Gilgamesh quickly turned around to look behind him.

Sure enough, he saw Akira standing there!

It turned out that Akira had already slipped past him, but due to his incredible speed, Gilgamesh hadn't even noticed.

"Goldie, I'll make good use of your Ea," Akira said with a smirk, casually tossing the legendary sword into his inventory space right in front of Gilgamesh.

Being robbed of his treasures right before his eyes was something Gilgamesh could not tolerate.

"You—!" Gilgamesh barely managed to speak before a golden spear of light pierced through him.

Before Saber's Excalibur could reach him, Akira's twelve-winged fallen angel form took action, striking Gilgamesh with devastating force.

"Goodbye, King of Heroes!" Akira declared, not bothering to waste any more words. He fired a rapid blast of light, obliterating Gilgamesh in an instant.

[Ding!~]

[Congratulations, Host, for completing a Villain Check-In!]

[Check-In Level: Gold.]

[Check-In Type: Special Event Check-In.]

[Check-In Event: Noble Phantasm Theft.]

[Requirement: Steal at least 100 Noble Phantasms from the King of Heroes.]

[Note: Since Gilgamesh has been defeated, the system will settle the rewards early. If you encounter other versions of the King of Heroes in different worlds, you can continue to accumulate rewards.]

[Ding!~]

[Congratulations, Host, for receiving the reward: Sword of Salvation.]

[Sword of Salvation: As the name suggests, this divine sword possesses the power to save the world. The wielder of this sword gains the ability to form contracts with planetary and earth spirits, becoming a true savior. However, unlike the contracts formed by Rama, the contracts made through this sword are entirely under the Host's control. Note: All Noble Phantasms stolen and stored in the inventory have been automatically transferred to the Sword of Salvation's armory. Even without forming a contract with a god, the Host can still use powerful divine weapon barrages.]

"Sword of Salvation?" Akira muttered, examining the blade. "The same Sword of Salvation wielded by the Last King, Rama? But mine seems different. His sword was bound by contracts, making him a slave to its power. Mine, on the other hand, feels more like a 'boss's sword.' In this contract, I'm the one in control."

With Gilgamesh gone, it was time to wrap up the Holy Grail War. Akira turned his attention to Rider, who was struggling against the invading dimensional creatures.

"Agumon," Akira called out.

[Understood, Akira.]

A golden barrier enveloped the world, sealing off the dimensional rift and trapping the invading creatures.

Akira stepped forward, arriving in front of the heavily wounded Rider. The King of Conquerors was in bad shape—his chariot was gone, his body was corroded by the dimensional creatures, and he was on the verge of death.

Rider's remaining soldiers, now fewer than a hundred, gathered around him, forming a protective circle. As Akira approached, they parted ways, allowing him to reach their king.

"If I'm not mistaken, you've come to deliver the final blow," Rider said, coughing up blood as he struggled to stand.

"That's right," Akira replied calmly.

"Good. I admit I can't fight against these dimensional invaders. I've lost fair and square," Rider said, nodding. "But I have one last request."

Akira already knew what Rider wanted. He turned to Waver, who was standing nearby.

"My king, it has been an honor to fight by your side once more," Waver said, his figure gradually fading as Akira sent him back to his original world.

Seeing Waver disappear, Rider smiled with relief. His only concern had been Waver's safety. As for himself and his loyal soldiers, they were already dead. Dying again meant little to them.

"It's a shame," Rider sighed. "This world has been severed, so I can't send my memories back to the main world. What an interesting experience, but my true self will never know of it."

In this Holy Grail War, all the Servants had gained power equivalent to their true selves, but their actual bodies had not been summoned. Only those who had absorbed Akira's special pieces had their true bodies brought forth. The others were merely Servants borrowing their true selves' power.

"Don't worry, Rider," Akira said with a smirk. "If I ever get the chance to visit the Fate world again, I'll make sure to tell your true self about this."

With that promise, Akira's chest ignited with sacred flames.

[Extreme Flame!]

Under the holy fire, Rider and his soldiers slowly dissipated, their forms turning to ash.

Meanwhile, in the Fate world, Saber had already defeated Berserker in just a few moves. In his heavily wounded state, Berserker's true form was revealed—a face Saber knew all too well.

"Lancelot," Saber whispered, her voice filled with sorrow.

"My king," Lancelot replied, his consciousness returning. He could sense that something about Saber had changed.

"Lancelot, you were right," Saber said softly. "I didn't understand the hearts of men. Because of that, you and the others suffered greatly for this kingdom, and for me."

Hearing these words, Lancelot's expression softened, as if he had finally found redemption.

"It's alright, my king. Your forgiveness is more than I deserve. As for understanding hearts… you've certainly become more… feminine. I wonder who it was that changed you."

Lancelot's voice grew weaker, and his body began to fade. Before he could say more, an angry voice interrupted.

"Damn it, Berserker! Get up!"

Kariya Matou, desperate to win the Holy Grail and fulfill his wish of marrying Aoi, refused to give up. He poured the last of his life energy into Berserker, using his Command Seals to force him to fight.

Saber glanced at Kariya. Akira had said it was fine to kill him, so she didn't hesitate.

[Wind King's Hammer!]

With a single strike, Saber sent Kariya flying. His body crumpled against a wall, half of it reduced to a bloody pulp.

"Goodbye, Lancelot," Saber said, tossing a fireball to finish him off. She didn't know why Akira had asked her to use the Holy Cross to deliver the final blow, but she didn't question it.

As Saber ended Lancelot, Akira received another system notification.

[Ding!~]

[Congratulations, Host, for completing a Villain Check-In!]

[Check-In Level: Gold.]

[Check-In Event: The Great Demon King of the Holy Grail War.]

[Requirement: Ensure all Servants in the Holy Grail War are eliminated due to the Host's actions.]

[Congratulations, Host, for receiving the reward: Second Awakening of High-Dimensional Succubus Bloodline.]

[High-Dimensional Succubus Bloodline Second Awakening: This bloodline not only grants the ability to charm living beings but also the power to charm the world itself. After the second awakening, the Host gains the ability to influence world events in their favor, similar to becoming a 'Child of the World.' In combat, the Host gains enhanced elemental affinity and near-infinite energy replenishment.]

On the outskirts of Fuyuki City, a young woman with a cross pendant was chasing a man who also wore a cross. The man was Kirei Kotomine, a priest, while the woman was Bazett, who had traveled far to seek revenge.

"Kirei Kotomine! It's time to atone for your sins!" Bazett shouted, healing her wounds as she pursued him. Both of them possessed the power of the hero Cu Chulainn, but Bazett had the advantage thanks to the Holy Cross, a gift from Akira that granted her weakened versions of his abilities.

"You won't escape!" Bazett activated the Holy Cross, trapping Kirei in a golden prison.

[Dragon's Prison—Seal of the Dragon King!]

With Kirei immobilized, Bazett charged her attack.

[Gae Bolg!]

The crimson spear pierced through Kirei's heart, fulfilling its curse of certain death.

As Kirei collapsed, the ground shook, and a golden light shot into the sky. The Holy Grail had manifested.

"The Holy Grail…" Kirei muttered, his voice fading. "To see it at the moment of my death… is this… God's mercy?"

Before he could finish, sacred flames consumed his body, reducing him to ash.

"You don't deserve redemption," Bazett said coldly, turning her gaze to the Holy Grail. Standing before it was a young man—Akira.

"Akira…" Bazett whispered, touching the Holy Cross around her neck. Her usually stern expression softened, and a faint blush appeared on her cheeks. She had come to Fuyuki for revenge, but meeting Akira had been an unexpected twist.

"I… should repay him somehow," Bazett thought, her heart racing. She wasn't sure if it was love, but she definitely felt something. And for now, that was enough.

Note: So far this story is published up to chapter 135 on my patreon, go check it out and remember that if we reach the goal of 60 power stones I will publish the next chapter.