[Dr. Kurosu Ouma and Dr. Yanagi Douji were two genius scientists who collaborated on genetic research. Their published papers attracted worldwide attention.]
[Outside of research, Kurosu married a talented woman from his university, and they had a daughter—Mana.]
[A meteorite crash shattered their peace. They discovered that the meteorite had a genetic resonance reaction. Upon study, they found it contained a virus—dormant under normal conditions but capable of causing biological tissue to harden and fragment when activated.]
[A mysterious man named Yuu informed them that this was the "Apocalypse Virus." Since it arrived via meteorite, it had already begun to spread. The first person to discover the meteorite fragments was Mana. When she matured, she would become "Eve" and seek her destined "Adam."]
[The two would become like kings, leading to the elimination or evolution of all other life.]
[Around this time, Mana's younger brother was born, and her mother fell bedridden due to virus infection.]
[Looking at her newborn brother, Mana showed an unusual expression. She decided he would become her Adam.]
The scene paused here.
...
Yosuga no Sora World
"Brother, I understand this."
"Sora~"
People from various "imouto" worlds shared the same thought—they knew exactly what was going on.
...
[The two doctors took different paths. Douji pursued human experimentation, conducting cruel tests on children.]
Naruto World
Orochimaru nodded in approval. He admired such methods and wished he could collaborate, but alas, they were in different worlds.
[Kurosu soon discovered that infected individuals could harness the virus's power. He called this the "Void Genome"—the "Power of the King."]
[A boy escaped from the laboratory—this was Gai. The three of them (Shu, Inori, and Gai) shared a brief period of happiness. Shu's bravery and cheerfulness inspired Gai to become like him.]
[Due to the virus, Mana began to change. She demanded Gai become her subordinate and repeatedly pressured Shu to marry her.]
[Meanwhile, Douji secretly read Kurosu's theories. Seeing the perfection of the Void Genome theory, he fell into despair. Despite his military-backed human experiments, he couldn't match Kurosu's solo achievements.]
[Consumed by jealousy, Douji killed Kurosu and stole his research results.]
[After yet another rejected proposal, Mana completely erupted. The virus's power destroyed the entire city, crystallizing everyone—this became known as the "Lost Christmas" incident.]
...
Guilty Crown World
People worldwide were stunned. They never imagined that former friends could become such monsters. The virus's power was beyond comprehension.
United Nations Headquarters
"We must suppress the virus's power. Do you understand?"
"Agreed. Deploy troops to suppress it."
"But Gai in the video already defeated our armies."
"So what? If necessary, use nukes! One isn't enough? Use two!"
"We must be cautious! Do you want to turn Earth into ruins?!"
...
At school, Shu recalled these memories and broke down. The sealed memories had resurfaced.
Ayase and other girls rushed to comfort him.
Meanwhile, Yashiro and other traitors faced "kind" reminders and "blessings" from others, especially Souta.
...
One Piece World
Everyone was overwhelmed by the complex relationships. The virus's power was terrifying.
"I recall a Gravity Fruit user who can summon meteorites," an unnamed marine officer whispered.
"Eh?!"
Everyone stared at him as if ready to devour him.
"Tell him not to casually summon meteorites!"
...
Naruto World
Pure Land
"It seems I shouldn't casually use Tengai Shinsei after resurrection," Madara Uchiha muttered.
This virus was insidious—even medical ninjutsu might be useless against it.
...
One Punch Man World
"Sensei, after you shattered that meteorite last time, are you feeling any discomfort?" Genos asked urgently. This virus was no joke.
Saitama, watching TV, picked his nose and rubbed his stomach. After a moment, his eyes widened.
"Bad news, Genos!"
"What is it, Sensei?!"
"Today's sale! Let's go!"
"Right away, Sensei!"
...
Unknowingly, people across worlds began to take meteorites and viruses seriously.
A single meteorite could wipe out humanity? How terrifying.
[The final battle arrived. Mana was resurrected.]
[Gai used the Void extracted from Mana's body to fight Shu. Meanwhile, Mana began spreading Lost Christmas—the Fourth Apocalypse had begun.]
[After a fierce struggle, just as Gai was about to deliver the final blow, Shu extracted Inori's Void from her flower and finally defeated Gai, reaching the end of the Apocalypse.]
[Gai finally revealed his true goal.]
The scene shifted to another dimension.
Gai gazed into the distance, his expression calm as he spoke softly to Shu:
[This is the ideal world the divine consciousness speaks of. Everything in this world will be preserved as memories within the crystals.]
[Those revered as kings will eventually come here.]
[I've always feared being eliminated, so I strived relentlessly. I wanted Mana... to become Eve.]
[I thought being pierced by you would save Mana, but the consciousness of biological elimination wouldn't allow her death.]
[But there's another way: fulfill the mission, become the demon king, become the Apocalypse Virus, and then let you kill me.]
[My mission... is over. Now it's your turn.]
As Gai and Mana were enveloped in crystals, they dissipated from this world.
The pure white King's Mark returned to Shu's hand.
Back in reality, Shu stared blankly, never expecting such an outcome.
Before he could process it, Inori's voice echoed from the shadows ahead.
[Shu... don't blame yourself. I've felt so many emotions from you.]
[All of it... is thanks to you.]
The figure in the shadows gradually emerged.
Inori, now fully crystallized, stumbled toward Shu, a heartbreaking sight.
This was the scene from the beginning.
The girl collided with the boy. Having lost all sensation, she asked, panic-stricken:
[Shu, where are you?]
The boy gently held her slender hand. The girl seemed to sense it, a glimmer of light in her eyes.
[Shu, you'll stay by my side, right?]
[Because I'll always support you. Okay?]
Tears welled in the boy's eyes as he whispered tenderly:
[Inori, let's go together.]
The boy raised his right hand to the sky. The ground glowed white, and a tremor shook the world.
Crystals worldwide began to shatter, flying toward the boy's hand.
He was absorbing the virus from everyone—he would bear the world's burden.
[I can feel everyone's hearts, and their memories too.]
[Even those who held malice toward me were born into this world loved by someone.]
Once, in an unknown place, there was a king. He was gentle and kind.
—The Gentle King
[Cherry blossoms blanket my heart; Inori's dance follows my wish.]
The screen abruptly cut to black.