Aftermath, Traversing the King of Fighters World.

Kamen Rider Duke suddenly burst into a dazzling light, surrounded by scorching energy. He transformed into an energy storm and charged towards the Eisenach armor with lightning speed.

"How is this possible!?" Ivan Vanko stared in shock at the energy storm before him, feeling the immense power contained within.

The energy storm swept in, and Kamen Rider Duke's attack rained down like a tempest. He used Sonic Arrows to slice at the armor's plating, desperately searching for weaknesses. The Eisenach armor let out violent explosions, enduring the fierce blows from Kamen Rider Duke.

However, the Eisenach armor was not to be outdone. It transformed into an impenetrable fortress, stubbornly resisting Kamen Rider Duke's onslaught. The armor released powerful energy fluctuations, forcing Kamen Rider Duke back several steps.

The duel between the two entered a white-hot stage. Both had sustained some damage, but their fighting spirit remained high. Kamen Rider Duke continuously weaved through the attacks, using his agile movements to dodge the armor's assaults and seek opportunities to strike.

The Eisenach armor, in turn, continuously fired energy beams and laser cannons, attempting to utterly defeat Kamen Rider Duke. The explosions, energy shockwaves, and light on the battlefield intertwined to create a breathtaking spectacle.

Time ticked by, and the strength of both sides began to wane.

"No, this won't do." Ivan Vanko couldn't wait any longer. If this stalemate continued, Tony Stark...

Feeling the increasing pressure, Ivan Vanko decided to make a final gamble. He controlled the armor and switched it to its ultimate energy mode: Reaction Drive.

The armor's energy modules began to whir, emitting a brilliant glow. Its body rapidly contracted, its form changing, and the entire armor began to radiate powerful and ferocious energy fluctuations.

Meanwhile, John Walker, transformed as Kamen Rider Duke, sensed the shift on the battlefield. A determined glint flashed in his eyes. He knew he had to unleash even greater power to defeat this formidable armor.

"Overclock Mode: Activate!"

In an instant.

John Walker recalled his conversation with Ryoma Sengoku.

"Overclock Mode. In this mode, your body feels like it's being torn into countless 'pieces of meat'." Ryoma Sengoku's voice held a hint of excited pleasure.

John Walker looked at Ryoma Sengoku, who had implanted something into Kamen Rider Duke's armor, and affirmed, "I have absolutely no problem with that."

"Eh. Is that so?" Ryoma Sengoku turned his head and tapped his shoulder with a wrench. "You'll only know once you experience it yourself."

Kamen Rider Duke activated Overclock Mode, emitting intense energy ripples throughout his body. His equipment began to upgrade and modify, unleashing even greater combat power.

"Well, he ended up using this mode after all." Ryoma Sengoku, from a distance, adjusted his glasses.

"I didn't expect you to hand over your only transformation device to him," Nathan Hawke said nonchalantly.

"Reaction Drive is a good thing. If you want a Kamen Rider transformation device, I can get one for you," Ryoma Sengoku replied excitedly, watching the distant battle.

The two re-confronted each other on the battlefield, the atmosphere becoming tense and charged with pressure. Ivan Vanko roared, the armor preparing to launch its final assault.

The Eisenach armor's Reaction Drive unleashed powerful energy fluctuations, forming an invisible force field that aggressively pushed towards Kamen Rider Duke. The ground began to crack, and surrounding buildings were destroyed by the shockwaves.

"Die! You who obstruct my plan!" Ivan Vanko controlled the Eisenach armor. A powerful energy began to converge on the armor's chest, then it was unleashed with a mighty blast!

John Walker stabilized his stance, feeling the immense pressure, but he was unafraid. He gathered all his strength and poured it into the Sonic Arrow in his hand.

"Overfrequencymustbekilled!"

"Starpiercingstrike!"

John Walker whispered, drawing his bow and releasing the arrow. The Sonic Arrow transformed into a lightning-fast beam of light, rapidly charging towards the energy blast fired by the Eisenach armor for a head-on collision.

The arrow merged with John Walker's full strength and will, piercing through the energy fluctuations with astonishing speed. It drew a beautiful arc in the air, like a meteor streaking across the night sky.

In an instant, the Sonic Arrow pierced through the energy shockwave and struck the Eisenach armor's energy core, erupting in a blinding flash. The armor's Reaction Drive ceased, and the energy fluctuations rapidly dissipated.

A massive explosion echoed across the battlefield, followed by billowing dust and smoke. As the smoke cleared, the Eisenach armor lay on the ground, heavily damaged.

Kamen Rider Duke stood in the center of the battlefield, his posture upright, the Sonic Arrow on his back gleaming brilliantly. His eyes conveyed the joy of victory and boundless courage.

"Justice never falls!"

His voice resonated across the battlefield, symbolizing the arrival of victory. Kamen Rider Duke had successfully defeated Ivan Vanko within the Eisenach armor, fulfilling his mission to protect justice.

This scene would be etched in people's memories, becoming a legendary battle.

Meanwhile, in Ivan Vanko's control room, it was attacked by an unknown individual. Seeing the empty room and the disappearance of crucial clues, Natasha began to call the Director.

"Director, I was attacked on my way here. When I arrived at the control room, there were no useful clues left."

"A mysterious force hidden in the shadows influenced this entire affair. Hawkeye was also attacked on the road. However, it seems they were only intentionally delaying him," Nick Fury said calmly.

"Please state the next mission."

"Come back first," Nick Fury said to Natasha, looking at American Ass, who was hitting a sandbag.

"Hmm, this report is exactly to my liking." Nathan Hawke, looking at Kamen Rider Duke, or rather John Walker, standing tall in the center of the battlefield and shouting "Justice never falls," put down the newspaper he was holding and gave Ryoma Sengoku high praise.

"It is my honor to work for you," Ryoma Sengoku said, flattering him.

"Don't play dumb." Nathan Hawke knew this guy didn't truly respect him.

"Let's recruit someone like that." Nathan Hawke became interested in John Walker, who, even after transforming into Kamen Rider Duke, always remembered his "way with words."

"The U.S. agent is quite good, isn't he?" Nathan Hawke thought highly of John Walker, who had briefly served as Captain America.

It could only be said that the Avengers had their cliques, and John Walker had his pride; it was normal that they couldn't get along.

Nathan Hawke asked, "How is his body?"

"He was injected with the G-Virus. His physical functions have greatly improved. However, there are still some side effects," Ryoma Sengoku said.

"How's the virus development coming along?"

"The research, adaptability, and stability of the virus are gradually improving. With Ivan Vanko's Eisenach technology, we've transferred control of the Iron Legion to biological weapons. Control over the T-Virus's Tyrants, zombies, and Lickers is quite good, but the biological weapons created from the G-Virus are not ideal – very unstable and difficult to control."

"What about infectivity?"

"The infectivity of the T-Virus biological weapons has been reduced by 95%. It won't turn dead bodies into zombies. The G-Virus is just too hard to control."

"Is that so." Nathan Hawke nodded, then ordered, "Have Electro and Andrew come to the combat testing ground immediately."

Combat testing ground.

Nathan Hawke in front.

Electro, Andrew, and Ryoma Sengoku behind him.

"Who do you think they'll summon this time?" Andrew asked, full of curiosity.

"Don't know, but it's strange that there hasn't been a single female summoned yet," Electro replied.

Hearing this, Andrew turned to Ryoma Sengoku and asked, "By the way, isn't that guy Sephiroth around?"

Ryoma Sengoku nodded and replied, "That guy is currently at the Umbrella Corporation's European branch. He's strong and holding down the fort alone, guarding against Hydra attacks."

"Alright, the boss is about to start the summoning," Electro said, and the other two also became serious.

The hexagram began to flash.

"Hmm?" Nathan Hawke's brow furrowed, sensing something was wrong. It seemed to be a reverse summoning.

Under the flashing, enveloping light.

The four of them disappeared from the combat testing ground.

"Where is this? What is this place?" Electro observed the courtyard's furnishings.

The other three also opened their eyes, and then.

"Ah!" A woman's scream rang out.

"Athena, what's wrong?" Sie Kensou rushed over, then found four "foreigners" in the courtyard. He immediately shielded Athena Asamiya, saying, "Don't be scared, Athena, I'll protect you."

"I was just startled, not scared," Athena Asamiya said playfully, tapping Sie Kensou on the head.

"Don't hit me, you'll go bald," Sie Kensou immediately clutched his head.

"What's going on?" a leisurely figure walked in, pausing for a moment upon seeing Nathan Hawke and the other three. Then, amidst the protests of Sie Kensou and Athena Asamiya, he approached Nathan Hawke, a frown on his face.

"So strange. You look really strange," Chin Genzai examined Nathan Hawke's appearance closely.

Electro was about to step forward to intervene but was stopped by Nathan Hawke.

"Hello. Master Chin Genzai, we've come to learn from you." Nathan Hawke performed a Chinese fist-and-palm salute.

Sie Kensou looked bewildered, "Huh?"

The atmosphere seemed to thicken.

"Alright, but I don't take disciples anymore. Learning is just learning." Chin Genzai glanced at Andrew behind Nathan Hawke.

"Thank you, Master Chin Genzai. Does anyone among you have money?" As soon as Nathan Hawke finished speaking, Chin Genzai immediately stopped him. "No, I don't need money. I just need one of you to participate in the KOF Tournament for me."