Right now, the boar-headed man looked absolutely furious — as if the wooden box held the murderer of his parents!!
SWISH!!
In an instant, a blond boy appeared in front of the box, blocking the boar-headed man's path.
[What do you think you're doing!?]
Zenitsu Agatsuma glared at him, shouting angrily.
The boar-headed man stopped and spoke coldly.
[You're part of the Demon Slayer Corps—you should know that whatever's inside that box is something that needs to be eliminated!! Move!! Now!! Or I'll take care of you and whatever's inside the box together!!]
He kicked Zenitsu again and again, but Zenitsu refused to move an inch, guarding the box with his life.
This only provoked the boar-headed man further.
His attacks fell like relentless rain upon Zenitsu.
BANG!!!
A powerful kick sent Zenitsu flying!!
But…
Even as he flew through the air, Zenitsu reached out and grabbed the box, clutching it protectively against his chest!
[You little bastard!!!]
Seeing this, the boar-headed man grew even more enraged and pounced on Zenitsu, kicking and punching without restraint!!
And then—!!
A man everyone across countless worlds recognized instantly—
Finally made his entrance!!
[HEY!!! YOU CUT THAT OUT!!!]
PA!!
Tanjiro Kamado arrived with a slap of his hand, grabbing the boar-headed man's shoulder with a furious expression.
[YOU NEED TO!!! CALM DOWN!!!]
Along with Tanjiro's angry roar—
He unleashed his signature move once again—
Breath of the Head!!!
BANG!!!
Everyone across the multiverse widened their eyes as they stared blankly at the scene before them.
Tanjiro once again took action…
Took action with his head!
He smashed his forehead directly into the forehead of the boar-masked man!!!
CRACK!!
A bone-rattling collision rang out, making countless viewers instinctively recoil, as if Tanjiro's rock-hard forehead was about to slam into their skulls too.
[AAAAHHH!!! THAT SOUND!! DIDN'T THEIR SKULLS SHATTER!?]
Zenitsu appeared on-screen again, clutching the box, his face pale with terror as he screamed.
His words echoed the thoughts of countless people from countless worlds.
That sickening collision of bone made skin crawl and heads throb across the multiverse.
BANG!!!
The boar-headed man was sent flying by Tanjiro's headbutt.
He crashed violently into a tree.
Leaves poured down like rain, burying him beneath them.
[Hehehehe… hahaha… interesting!!! VERY interesting!!!]
The boar-headed man leapt to his feet.
Instead of pain, Tanjiro's headbutt only made him more excited.
SWISH!!
The next moment, like a wild beast freed from its cage—
He charged barehanded straight at Tanjiro, and the two erupted into a fierce brawl.
Whoosh!
Fist met fist.
Blow met blow.
Every strike landed solidly — a bone-shaking, blood-boiling exchange.
CRACK!!
Unable to endure anymore, Tanjiro drove a powerful punch into the boar-headed man's abdomen.
A sharp snap rang out—
Tanjiro had broken several of his ribs.
[COME ON!!! LET'S KEEP GOING!!!]
But surprisingly, the boar-headed man didn't fall.
Like an indestructible cockroach, he staggered back up.
[YOU!! NEED TO CALM DOWN!!!]
Tanjiro was at his limit.
Seeing Zenitsu beaten bloody while protecting his sister, something inside Tanjiro finally snapped.
Hooo~~
Across the multiverse, everyone fell silent as they watched Tanjiro lower his stance and take a deep breath.
A faint blue aura flowed from his nostrils—
The Breath Technique!!!
SWISH!!
Tanjiro struck!!
He grabbed the boar-headed man's shoulders—
Just like he had previously grabbed the head demon's hair—
[CALM!!! DOWN!!!]
BOOOOM!!!
An enraged headbutt exploded with thunderous force!!
It sounded as if both their skulls were about to burst apart!!
CRACKKK!!!
The ground shattered beneath them!!
A terrifying shockwave erupted outward from their bodies!!
That headbutt—
Stunned the entire multiverse!!!
...
The world of Naruto.
Naruto Uzumaki toppled to the ground in fright, staring at the scene in terror.
What kind of monster was that!!!?
A single headbutt caused such massive destruction!?
Naruto almost wet himself.
Iruka swallowed hard, clutching his own forehead.
His skull was throbbing in sympathy pain.
...
The world of Bleach.
The Living World.
Ichigo Kurosaki's jaw dropped as he stared at the screen.
He slowly turned toward Rukia Kuchiki.
"Hey… Rukia… could you tank a headbutt like that?"
Rukia shot him a sideways glance and smirked.
"I think your head is pretty tough. You should try it."
Ichigo: "…"
Feeling wronged, he muttered softly,
"What the heck… your forehead's pretty big too… What is that guy's head made of anyway? No wonder he's called the Head-butt Hashira… That head is harder than a pillar…"
It was a good thing the Hashira from Demon Slayer couldn't hear him.
Otherwise, they'd definitely chop Ichigo into paste.
Because…
Their "Hashira" and a literal "pillar" are NOT the same thing!!
...
The world of Dragon Ball.
Son Goku's eyes sparkled with excitement.
He had discovered an interesting new fighting technique.
A headbutt like that…
might really catch an enemy off guard!!
The battle maniac Goku instantly turned, lowered his head, and rammed into a huge boulder.
BANG!!
"Owww!!! That hurts!!!"
Goku clutched his forehead, baring his teeth as he stared at the small dent in the rock.
"Yup… this isn't something you can learn in a day or two… That Tanjiro guy is really something."
Chi-Chi covered her face.
She was already used to her husband being a lovable idiot.
Krillin's mouth twitched violently.
He couldn't understand Goku…
And he couldn't understand how Tanjiro's skull was that absurdly tough either.
However…
While many across the multiverse focused on Tanjiro's iron-hard forehead—
The true powerhouses focused instead on a different moment from the video.
The moment Tanjiro attacked—
That subtle, mystical breathing technique…
There was something powerful hidden within it.
Something worth studying.