Crossover Anime: Starting with Bankai from Demon Slayer

Three months ago, when Tanjiro and his two companions carried the dying Asuka and Kyojuro into the sanatorium, Inosuke was deeply shocked.

He lived alone in the mountains from a young age, was raised by wild animals, created the Breath of the Beast, and once considered himself brave and invincible.

But after encountering more and more powerful people, this arrogant idea had long since disappeared; often, it was just a way to bolster his courage.

Inosuke is reckless, rude, and unwilling to admit defeat, but he is not stupid.

The image of the Mugen Train derailing three months ago kept replaying in his mind:

Kyojuro Rengoku was covered in blood, and Asuka's sternum was shattered... But even so, they did not give up and fought until the very last moment!

The blond older brother is very strong, and Toritaro is also very strong.

But even such a strong swordsman was seriously injured in front of the Upper Moon Demon Moon.

As for myself, I could only stand by and wait for the opportunity to get help, spending most of the time in a daze!

"More! More!" He used all his strength to pull several boulders in the courtyard, desperately training his physical strength.

"...I can't even get involved in a battle like this...I'm not strong enough!"

Frustration mixed with the desire to become stronger forced him to consider whether there was any possibility of further improvement in his Beast Breathing technique.

So when Toritaro was receiving treatment at the Butterfly Mansion and fell into a coma, he made a decision.

"Hey!" He grabbed a passing Demon Slayer member and asked in a gruff voice, "Where did Toritaro train to become a Pillar?"

"Huh? What? Bird Taro? And why are you wearing a pig's head?"

"Enough with the nagging! Toritaro is Toritaro! You idiot!"

He asked many people before finally learning from Shinobu Kocho, the woman he found most difficult to deal with, that Asuka was practicing a sword technique called Breath of the Wind, which was located at the Hayama Training Center in the north.

"Wind Breathing?" Inosuke had heard of this style.

When he first joined the Demon Slayer Corps, the members of the Hidden Division defined his Beast Breathing as a derivative style of Wind Breathing, which he was somewhat dissatisfied with.

How did my own Beast Breathing become someone else's subordinate, you bastard!

However, since the Breath of Wind technique was able to train that guy Toritaro to be so good, it seems like it's worth trying.

So he bid farewell to Tanjiro and the others, and with his lord's permission, followed the Hidden Force members to Hayama.

Go there! Find a way to make Toritaro stronger!

On this day, he finally arrived at the gate of Yeshan.

"Mr. Inosuke, this is...."

"The pig suddenly advances——!!"

Before the Hidden Unit members could finish speaking, Inosuke roared and charged in!

"Wow! There's a wild animal!!"

A teenager who was sweeping fallen leaves in the yard was so frightened that he dropped the broom and shouted in panic.

Inosuke ignored him and headed straight for the largest dojo building in front of him, where voices were coming from.

boom--! ! !

He stormed into the room without any hesitation, roaring amidst the shocked gazes of the disciples:

"Inosuke-sama has arrived!! Who's going to train Toritaro?! I want to train too!!"

The eyes beneath the boar's headgear were piercing, scanning the startled crowd.

In the center of the main house, a tall, thin, white-haired, one-armed old man sat cross-legged on a futon, holding a steaming cup of coarse tea in his only remaining right hand: "Remember, when you breathe, pay attention to the expansion of your lungs, remember..."

Right now, Arashizaki Tesshin, a trainer at the Hayama Breeding Center, is explaining the secrets of breathing techniques to everyone.

The imposing intrusion he had just witnessed seemed like a gentle breeze to him, and did not interrupt his lecture.

Beside him, a young woman dressed in an elegant light gray kimono, with a gentle and calm demeanor, had just refilled the old man's tea.

At that moment, she also raised her eyes and looked at the uninvited guest with surprise.

"Hey! What's going on? Why aren't you responding!" Inosuke's noisy chatter made Arashizaki Tesshin frown.

Seeing that the students' attention had been drawn to Inosuke, he stopped pressuring them and slowly put down his teacup: "Alright, let's end today's lesson here. Go practice on your own."

Once most of the crowd had left, he spoke up, "Are you the Demon Slayer Corps that Lord Lieutenant mentioned?"

He had received a message from the raven the day before yesterday, so he naturally knew that a reckless young man would be coming to cultivate soon, but he hadn't expected...

Arashizaki Tesshin scrutinized Inosuke, his brows furrowed. "I don't quite understand. You already have your own breathing style, so why come here to me?"

"My Beast Breathing is of course the strongest! I just want to know, how did you train Torino to be so powerful!" Inosuke patted his chest, the tusks on his boar's head trembling excitedly.

"Teach me too! I want to defeat the Upper Moon too!"

Arashizaki Tesshin narrowed his eyes slightly, sighed softly, and his eyes were filled with helplessness at being overwhelmed.

He already knew that Asuka had narrowly lost to the Upper Moon and was very worried about his disciple. Every two days, he would send Kasugai Crow to inquire about Asuka's treatment progress.

To be honest, the idea that Asuka could fight the Upper Moon Demon Moon until dawn was simply unbelievable to him.

In his heart, the bird was still that cold, aloof little fellow who kept his distance from everyone; he never imagined it would grow up so quickly...

However, Arashizaki Tesshin wouldn't be so shameless as to claim credit for this.

"...Asuka is a strong and hardworking child. His strength today is not because of me. You've got the wrong person." Arashi picked up his teacup, took a sip, and said calmly, "Now that you have the power to slay demons, go and fulfill your duty. Don't disturb the peace here."

This casual refusal instantly ignited Inosuke's fiery temper.

"You nagging old man!" Enraged, he charged directly at Arashiki Teshin, his right fist unleashing a gust of wind: "Let's see if you'll talk!"

Despite the devastating punch that could split rocks and shatter stone, Arashizaki Tesshin's body didn't even flinch.

In the instant the fist struck, he used the hand holding the teacup to forcefully deflect Inosuke's wrist from the inside—

boom! !

The small movement directly caused Inosuke to lose his balance, his forward momentum was abruptly cut off, and his huge body flipped in the air like a clumsy spinning top!

Not only did he miss his punch, but he also fell headfirst into the sliding door behind him.

"Ouch--!!"

He fell flat on his face like a wild boar, and awkwardly straightened up.

"Pfft." Pear Blossom covered her mouth and chuckled softly.

Yes, yes, that's exactly the feeling! Inosuke's gaze, hidden beneath the boar's head mask, burned intensely.

When I provoked Toritaro, the other party demonstrated the weakness of his attack with a very subtle movement.

What did he say again? What flaw? What momentum? Never mind, I've forgotten it all!

That one-armed old man is really something. I should learn from him! I'll definitely be better than Toritaro when I get back!

Arashizaki Tesshin slowly stood up, looking down at the disheveled Inosuke on the ground:

"Alright, alright, stop fooling around. Your stubbornness, if it's just about imitating others, will only lead you astray." He waved his hand helplessly and turned to walk outside.

"Kenichi! See you off."

Kenichi, whose name was called, quickly responded, glanced at Inosuke lying on the ground with some sympathy, and ran to pick up the pair of serrated swords that had been thrown out.

"Wait! You stinky...old man! Don't leave!"

Inosuke struggled to his feet, not even bothering to brush the dust off his clothes, and hurriedly shouted:

"I...I can't go back like this! Toritaro is still lying there!...I have to become stronger! Stronger than everyone else!"

"I will no longer stand idly by and watch my teammates fall!"

"Please! Teach me!"

"If you don't teach me... I'll practice here myself! Until I master it!"

He held his neck straight, like a stubborn wild boar cornered on the edge of a cliff, expressing his most unwavering determination with the fiercest posture.

The eye sockets under the pig's head were even slightly red with extreme resentment.

Arashizaki Tesshin paused at the entrance to the corridor leading to the inner room, but did not turn around.

He remained silent for a moment, then finally turned his head and looked helplessly at the pear blossom:

"Sigh... why don't you take him under your wing?"