Chapter 2 : Mugen Train

Demon Slayer World

Demon Slayer Corps Headquarters!

Mitsuri Kanroji, known as Love Hashira, with her long pink hair, knelt on the ground, tears streaming down her eyes, her composure shattered.

"Why is this happening..."

Although she was one of the Hashira, she had once been part of Rengoku, Kyojuro's step-sibling, before she became a Hashira. Kyojuro's father had taught her.

Her flame-based Breath of Love had evolved from the Flame Breathing technique.

They had grown up as close as siblings.

Seeing the first image, depicting Kyojuro's death, was a blow that her heart found hard to accept.

Despite being a member of the Demon Slayer Corps, she had steeled herself for death, but this was too sudden.

Kyojuro was also present. He walked over and gently patted Mitsuri's head. His eyes held no fear, and he spoke with a smile:

"I must have fallen in a fierce battle against demons. Mitsuri, there's no need for sadness."

Seated on the porch, Oyakata-sama of the Ubuyashiki Family wore an expressionless face, but his heart was heavy with sorrow.

Another life was slipping away...

Within the Rengoku Family Mansion, a man with a wild beard and unkempt hair slowly sat up.

He was Kyojuro's father, the previous Flame Hashira, Shinjuro Rengoku.

Tears welled up in his eyes as he murmured:

"Ruka, is he going to join you as well?"

In the Infinity Castle, Muzan dressed in women's attire, was brimming with excitement.

"The demise of Kyojuro... This is only the beginning. The Demon Slayer Corps will fall, one and all!"

...

In the world of One Piece, Sengoku furrowed his brows:

"Death caused by Demons? Is it truly another world!!"

"And that young lad, his eyes hold unwavering determination and justice."

"Damn it! Has evil truly triumphed over justice!?"

...

[Screen Transition]

[A speeding train starts moving, three teenagers rush to catch it and sneak aboard.]

Tanjirou at the Butterfly Mansion widened his eyes in disbelief, not expecting to see himself depicted in the scene.

On the other hand, his companion, Zenitsu, had tears streaming down his face, his voice a mix of worry and tears as he wondered why he would take such a dangerous risk.

Inosuke, in his excitement, clenched his fists and exclaimed, "Yeah, that's the spirit! Charge on, you pigs!"

[Not long after, Rengoku Kyojuro appeared like a blazing flame.]

[The three of them sat together, and Enmu devoured eleven lunch boxes in a row.]

In every world, powerful figures frowned simultaneously.

"Heh, what a glutton." Sasuke chuckled, disdain evident in his eyes.

"He looks like an average, slightly powerless individual. Wasn't this scene a bit off?" Luffy scratched his head in puzzlement.

"A bit disappointing." Aizen's eyes drooped.

Many had the same notion, while others were left baffled.

[Scene Continues]

[The train began ticket inspection, but an underhanded scheme unleashed the Blood Demon Art.]

[Sleep now, and know no pain in your dreams!]

[At the front of the carriage, one of the Twelve Kizuki appeared, a twisted smile adorning his face.]

"Is this the demon from that world? It seems feeble and repugnant. But to ordinary people, it might spell disaster!" Sengoku's eyes bore an icy glare.

"A demon? Not a soul, but a being with unique abilities and traits. Their components would be invaluable." Orochimaru, from an underground lair, had eyes that burned with desire.

"Oh? So I'm the one who took down Kyojuro, huh? Lord Muzan, did you witness it?" Enmu, one of the next in line, blushed.

[After Rengoku and the other three comrades fell asleep, four manipulated humans emerged, connecting them one-on-one using special ropes.]

[In the ensuing dream, the core of Tanjiro's pure spirit connected with another person.]

[Zenitsu fell into a trance with Nezuko, unable to break free.]

[Inosuke dominated the dream as a boss, terrifying the intruders who entered.]

[Within Rengoku's dream, the intruder found the spiritual core.]

[Yet, just as the intruder prepared to destroy it, the body of Kyojuro, who lay asleep beyond the dream world, stirred and he rose, grabbing the young girl linked by the rope.]

[Kyojuro was still asleep, but his instincts roused him to action.]

"It's a good instinct, and it hints at his potential for greatness." Garp secretly nodded, recognizing the young lad's promise.

Many from various worlds also nodded discreetly upon witnessing this, though their sentiments varied.

Enmu, who hadn't yet ascended to become one of the Lower Moon, bore a brooding look:

"Useless humans, you couldn't even find the core."

[Scene Continues]

[The four escaped the dream unharmed.]

[The carriage transformed, nightmares amalgamated, devouring the train as numerous fleshy tentacles emerged in the carriage.]

[Rengoku Kyojuro wielded a flaming sword to protect the passengers, while Tanjiro and Inosuke confronted the demons.]

"Fire, water, lightning... Weak as it may be, it's intriguing." Aizen finally displayed a modicum of interest.

"What a cool move..." Naruto exclaimed with excitement.

[Tanjiro was repeatedly incapacitated by the Blood Demon Art in his dreams, only to awaken through self-inflicted harm.]

This scene etched the young man into the hearts of many across the worlds.

Even though it was an illusion, few could fathom mustering the courage to swing a blade at oneself without hesitation.

[At last, the two severed the head of one of the Lower Kizuki, causing the train to overturn and halt.]

[Tanjirou collapsed to the ground, blood oozing from his abdomen.]

[Kyojuro began teaching the art of breathing to facilitate self-healing.]

[In that moment, the ground quaked, and twin golden lights pierced the dust and smoke.]

[As the haze dissipated, a short-haired demon, its muscles streamlined, emerged.]

[Entwining, three!]

The potent aura radiated from the screen. Though it failed to faze someone like Sengoku and Aizen, it commanded their respect.

However, newcomers like Naruto and Sasuke, fresh from graduation, felt the weight of the pressure.

[Boom! The earth trembled!]

[The three Kizuki struck Tanjirou, who lay on the ground, with a ferocious blow.]

[Suddenly, flames erupted, and a long blade ablaze with fire swept upward!]

[The third of the entwining Kizuki withdrew, his right arm severed from palm to forearm.]

[Yet, in the next instant, he nonchalantly fused it back together, leaving no trace of a scar.]