[The disgust, which overshadowed brotherly affection, instantly grew rampant due to the 'transgression' of crossing classes! That day, Yoriichi, who always watched his brother practice, picked up a bamboo sword for the first time amidst the casual jokes of his father's subordinates. Kokushibo just watched from the side. His brother only knew the chants and how to hold a sword; it was just a game. A gust of wind swept past Kokushibo's eyes, and in the instant a black shadow flickered, Yoriichi had already arrived in front of his father's subordinate! "Bang--", a dull sound echoed four times in an instant, and then, in front of the seven-year-old child, that strong and exceptionally skilled samurai collapsed to the ground like a clumsy target, without any resistance! Even the bamboo sword in his hand split into two, breaking in front of Kokushibo. By the time Kokushibo came to his senses, everything was already settled. He stood with his mouth agape, his eyes wide with horror. He wanted to say everything, but at this moment, he couldn't say anything! A huge abyss rushed in, as if to swallow him whole!!! What just happened...? His brother, that weakling...?!!! It was only at this moment that Kokushibo realized that years of effort, at this moment, in front of his brother, were a complete joke!!! That subordinate whom he had never once defeated was now easily defeated by him. Absurd... How utterly absurd!!!]
...[Orochimaru: "Excellent! As a seven-year-old child, both his intuition and combat reactions are beyond imagination! Is he someone born powerful?"]
[Gabriel: "I seem to understand why he is called a god."]
[Uzumaki Naruto: "That's so cool! What's that move called? He knocked down that big dummy in one go!"]
[Kamado Tanjiro: "This is... Mr. Yoriichi?"]
[Miyamoto Musashi: "Magnificent. If he continues to grow, he might one day break through 'Void'."]
[Hawkeye: "As expected, I wasn't wrong. This guy is indeed a natural prodigy of the sword."]
[Mahito: "Hehe~ Is no one paying attention to that little guy? He looks like he's about to shatter, you know."]
...Demon Slayer World
"That's right...!", a flicker of anger flashed in Kokushibou's eyes.
Why didn't he show such talent from the beginning?!
Why hide it? And why, of all people, is it my brother!
...Demon Slayer Corps Butterfly Mansion
"Oh! I feel like Mr. Yoriichi at seven years old was already stronger than I am now!", Agatsuma Zenitsu exclaimed.
"No need to feel, he just was," Inosuke picked his nose.
"Ah, you jerk!"
"...With great strength, one can protect their family, right, Mr. Yoriichi?", Tanjiro's face showed a faint smile, feeling fortunate for Yoriichi who had found his direction.
It's just... Tanjiro hesitated.
Why would Mr. Kokushibo, as Mr. Yoriichi's brother, have such a mindset?
Shouldn't all brothers love their younger siblings?
[The news that a seven-year-old child had knocked out a samurai in four moves immediately reached his father's ears. But after that, Yoriichi gave up the idea of becoming a samurai because he disliked the feeling of hitting others. Kokushibo still held a glimmer of hope. Perhaps, Yoriichi had only mastered the secret to becoming strong? After repeated questioning, Yoriichi told the truth, but Yoriichi's words were beyond his comprehension. In Yoriichi's eyes, all living creatures were transparent, observing the movement of their lungs, the direction of their bones, the contraction of their muscles, and the flow of their blood. This translucence was innate to him. And this perfect ability made it possible for all techniques to be easily realized.]
[Trisolaran Leader: "This... how is this possible? Could it be that this Tsugikuni Yoriichi is a higher-dimensional being? Otherwise, how could he directly see the world from a four-dimensional perspective?"]
[Uzui Tengen: "Flashy! It's absolutely flashy! Flashy translucence, flashy combat awareness, and this flashy talent that's so flashy I can't even look directly at it!"]
[Hawkeye: "As expected, he's a born strong one! If there's a chance, we can spar with swords!"]
[Gama-Maru: "If he were in our world, he'd probably be another child of prophecy."]
[Jiraiya: "Such a powerful existence, what mission awaits him? What does he live for?"]
[Kagaya Ubuyashiki: "Demons. Man-eating demons led by the Demon King Kibutsuji Muzan."]
[Orochimaru: "Hiss~ Being called a demon must mean they have some unusual abilities."]
[Kochou Shinobu: "They have immense strength and various bizarre abilities. Unless you cut off their heads with a Nichirin Blade or expose them to sunlight, they won't die."]
[Douma: "That's right~ Lord Muzan is the strongest existence!"]
[Albedo: "Heh heh, ignorant fool, merely the lowest trash among the undead branches. How dare you claim to be the strongest in front of Lord Ainz Ooal Gown?"]
[Whenever swordsmanship was mentioned, Yoriichi always looked melancholic. Compared to swordsmanship, he preferred to fly kites and play with his brother. Kokushibo's eyes gradually became hollow. Such a huge disparity caused him to be swallowed by the abyss little by little. It turned out that, until now, his 'pity' as the strong one was nothing but wishful thinking. And the widespread attention gained through endless suffering and sweat, under the light that Yoriichi inadvertently displayed, was as small and humble as a firefly. Like dust... they both knew that their father would make the right choice, and their situations had already reversed. It was also during that time that their mother passed away. Yoriichi informed his brother of the news and also mentioned that he would be going to the temple earlier than planned. Yoriichi took out the short flute from his embrace. He looked at the wooden flute with immense tenderness, "I will cherish this flute, given to me by Brother, as if it were Brother himself, and never give up." The child bowed respectfully, then waved goodbye and left this home, which held no warmth.]
[It was only when Kokushibo read his mother's diary that he learned Yoriichi had left early so as not to affect his future, and that Yoriichi had known about their mother's illness years ago.
What seemed like a childish act of affection was actually him supporting his mother with his tender body.
But Kokushibo knew nothing.
As he read the descriptions in the diary, sweat had already silently trickled down his face, his body was cold, and an uncontrollable fear and anger rose in his heart.
Whether it was power or a noble character far beyond his age... Yoriichi surpassed me.
There was no emotion, no gratitude, only... the humiliation of being pitied and a deep-seated hatred for his genius younger brother!!!]
[ Ancient One: "A pitiful person consumed by jealousy." ]
[ Nami: "Wuwuwu, Mr. Yoriichi is truly a powerful and gentle person, but he is misunderstood..." ]
[ DIO: "As expected of Tsugikuni Yoriichi! He easily accomplished what Kokushibo could not! Hahahahahahaha!" ]
[ Thor: "As an elder brother, one should have a generous heart! I have never envied my brother Loki!" ]
[ Loki: "...? What the f***! Oh my god... %￥#@#@!" ]