Crossover Anime: Starting with Bankai from Demon Slayer

Inside the Yeshan Dojo, the sounds of swords clashing were incessant, each impact accompanied by a heavy breath and a suppressed groan.

"Hooray—! Beast Breathing - Second Fang - Blade Clash!!"

Inosuke let out a beast-like roar, tearing the two wooden swords in wild arcs as he unleashed his self-created sword technique.

However, although he was strong, his lower body was unstable and his forward momentum was too strong, leaving his center wide open.

"The flaws are too obvious!" a sweet female voice rang out.

Pear Blossom's figure glided gracefully to the side, her wooden sword mercilessly striking Inosuke's unsuspecting ribs.

"Ugh!" The stinging pain instantly distorted Inosuke's movements.

The powerful force was struck in a vital spot, and like a punctured balloon, it deflated by more than half.

He staggered forward a few steps, nearly falling to the ground, and only managed to steady himself by bracing his two swords against the ground.

"We lost again!"

Inosuke gripped the boar headgear with frustration, his eyes flashing with resentment and anxiety.

"Why?! I'm stronger and faster than you, but I just can't hit you! It's so frustrating!"

Rika slowly sheathed her sword, looking at the stubborn rock before her, brimming with primal power yet never having undergone careful carving: "Inosuke's problem isn't a lack of power, it's that your foundation is too weak."

She pointed to Inosuke's legs: "Every time you exert force, there are unnecessary movements and huge openings. Even a second-rate swordsman like me can easily find your weaknesses."

"Damn it! Damn it!" Although Inosuke was indignant, he knew that Rika was right, so he sulked to himself.

Seeing Inosuke's frustrated look, Rika smiled and patted his pig head, comforting him: "Don't be discouraged, let's practice again, okay? Remember, don't just think about hitting me, first learn to stand firm, and learn to protect yourself from being hit in vital areas while attacking."

Faced with such concern, Inosuke felt a wave of dizziness. He quickly suppressed his anger and forced himself to recall the key points that Rika had demonstrated and explained countless times before.

This scene has been repeating itself for almost three months at the Hayama Training Center's training grounds.

The mornings consist of tedious basic stance training and footwork correction, while the afternoons are filled with intense, grueling sparring sessions.

Arashizaki Tesshin would occasionally appear in a corner of the dojo, observing silently without interfering with Rika's teaching.

In his view, Pear Blossom is the next teacher at the training institute, and it's good for her to adapt sooner rather than later.

He also knew that Inosuke, this untamed beast, needed the calm and patient guidance of Rika, rather than his own overly forceful style.

Honestly, even Asuka didn't receive this kind of treatment when she was at the Hayama Breeding Center.

He underwent almost two years of closed-door training in physical fitness and sword techniques before being thrown into the Demon Slayer Corps selection by Arashi-saki-sensei. As a result, much of his combat experience was accumulated through battles against demons.

Time slipped away amidst sweat, bruises, and the constant sounds of attacking from both sides.

Late that night, all was quiet except for the howling mountain wind.

The daytime training had long since ended, and the dojo was deserted.

The moonlight cast a cool glow, illuminating Inosuke, who was lost in thought in the courtyard.

"...Damn it, I was so close to beating that woman today." He stared at the night sky, somewhat sullenly, wondering if his training had made him stronger.

Just as he was intently recalling the day's training—

His animalistic senses began to warn him; a chill instantly shot through his spine and spread throughout his body, making every hair on his body stand on end.

Inosuke's body stiffened abruptly, a fear stemming from his biological instincts and the extreme terror he felt when facing a apex predator!

"This feeling...it's like that day..."

He suddenly drew his Nichirin Blade, his eyes fixed on the direction of the mountain gate!

Almost at the same time that Inosuke noticed, the paper doors of two quiet rooms deep inside the breeding center were suddenly pulled open.

Arashizaki Tesshin and Rika arrived quickly, their faces extremely solemn under the moonlight.

Tie Xin gripped his sturdy and broad Nichirin Blade tightly, while Li Hua silently drew her own sword, its slender blade gleaming with an emerald green luster under the moonlight.

"This...this is such demonic energy!" Rika's voice was filled with undisguised horror, her hand gripping the sword trembling slightly as she felt an unprecedented threat. "Is it the Lower Moon...no, the Upper Moon?!"

Arashizaki Tesshin's eyes were serious, and his entire body was tense.

His lifelong experience fighting ghosts told him that the one who came was no ordinary evil spirit.

"Rika, lead the students and escape through the back mountain!"

Although it's unknown how this demon found its way to Hayama Training Center, given its existence... Arashizaki Tesshin can only try his best to save the lives of the other trainees!

"Teacher! I can't..."

"There's no time! Take them and run!"

However, the visitors did not give them any time to assemble or evacuate.

boom--!!!

The gate torii gate of the Hayama Breeding Center, along with sections of stone walls on both sides, exploded with a deafening roar!

Gravel and wood chips shot out like a torrential rain, filling the air with dust.

The commotion instantly resounded throughout Yeshan, shattering the deathly silence of the night.

The breeding center was instantly awakened, and panicked voices rose and fell.

A figure slowly emerged from the smoke and dust.

Her short pink hair stood out starkly in the moonlight, and the grotesque tattoos covering her entire body writhed as if alive. Her golden eyes burned with an almost fanatical fighting spirit and undisguised rage.

It is the Upper Moon Three – Akaza!

"Is this the home of that unpleasant swordsman? It's been a long search..."

Akaza glanced at Arashizaki Tesshin, Rika, and Inosuke standing guard in the courtyard, a bloodthirsty smile spreading across his face: "Who is the black-haired swordsman's teacher? Come out and fight me."

"You wicked demon! This is no place for you to run wild!"

One-armed Arashizaki Tesshin stood in front of Rika and the others, his beard and hair standing on end, and his angry shout was like a thunderclap.

He knew that in the face of such a terrifying existence, any attempt to test his limits would be suicidal; he had to go all out!

With a sudden stomp of his foot, Arashizaki Teshin burst forth like a whirlwind, his Nichirin Blade aimed straight at Akaza's head!

"Wind Breathing - Eighth Form: First Fierce Wind Slash!!"

"Tsk...this is a bit out of line."

Akaza's expression showed some impatience as he faced Arashizaki Tesshin's all-out attack.

A huge snowflake array instantly bloomed beneath his feet, and his body shifted slightly as if he had foreseen the future, allowing him to dodge all of Arashizaki Teshin's ferocious sword strikes.

As Arashizaki Tesshin launched his attack, Rika's figure had already merged into the night wind, slashing out a swift wind sword shape from Akaza's flank blind spot.

Akaza dodged Arashizaki's attack, and with lightning speed, his left hand gripped Rika's cunningly angled knife tip with perfect precision!

He caught that blade, sharp enough to cut iron like mud, with his bare hands!

"Seriously, is this really a place where black-haired swordsmen train? You guys are far too weak!"

A surge of violent fighting spirit instantly coalesced, and Akaza threw a punch with some impatience!

clang--!!

Arashizaki Tesshin felt an overwhelming force slam into his sword, and the Nichirin Blade snapped in two!

The punch sent numbness through his arms and a surge of blood to his head, causing him to fly backward uncontrollably!

Pear Blossom was also struck as if by lightning. The knife tip that had been grabbed exerted an irresistible force, causing her hand to split open instantly.

She decisively discarded the knife, touched the ground with her toes, and with amazing flexibility performed a backflip, narrowly avoiding the aftershocks that followed.

Even so, the violent shockwave stung her cheeks and made her clothes flutter loudly.

In just one exchange, the two strongest individuals in the training institute were injured and forced to retreat!

"Pear Blossom! That old lumpy iron man!"

Am I still stuck in the same place? Am I not able to protect anything?!

Inosuke's eyes widened in fury as he watched the two who had taught him be instantly and severely injured. An unprecedented rage overwhelmed his instinctive fear.

He mustered his courage and forcefully slashed out two sharp blades, strangling Akaza's nape!

"A clueless nobody."

Akaza hates nothing more than weaklings who can't recognize their own strength.

Seeing Inosuke rushing towards him, he felt no joy in the battle, only annoyance.

Making himself do this kind of task of annihilating the weak—this is truly Muzan-sama's punishment for himself...

boom! boom! boom!

Inosuke only saw a blurry leg shape before being struck by several heavy blows all over his body!

He felt that at least two of his ribs were broken, his internal organs seemed to have shifted, and he was kicked away violently!

Inosuke's body slammed into the dojo's pillar, breaking the thick wooden post. His vision went black, and the two beast-tooth Nichirin Blades flew far away from his hands.

"Cough... Pfft!" Inosuke spat out a mouthful of blood, struggling to get up, but the excruciating pain almost suffocated him.

"Boring, so boring!" Akaza looked at the struggling three, a look of disappointment on his face. "Is that all? You can't even let me warm up!"

He locked his gaze on Inosuke's boar headgear and said nonchalantly, "You look familiar. Let's start with you."

Before he could finish speaking, Akaza's figure suddenly vanished.

Inosuke only felt a flash of pink light, and then a chilling aura of death enveloped his entire body.

Akaza appeared before him, his right fist brimming with terrifying fighting spirit crashing down!

"Inosuke! Get out of the way!!"

Rika mustered all her strength and, in a flash, drew her spare Nichirin Blade, blocking Inosuke's path!

Stop now, Komashita!!

Akaza hesitated for a moment, but ultimately did not throw the punch.

At that moment, the fist was only inches away from Pear Blossom's face. The force of the punch grazed her face, and blood dripped down her cheek.

Here we go again. Who is speaking?