The name Tsugikuni Yuko had in her previous life no longer mattered, because in this life, she was Tsugikuni Yuko.
As the eldest daughter of the tsugikuni family, she had two twin older brothers.
They were the eldest brother, Tsuneguni IwaKatsu, and the second brother, Tsugikuni Yoriichi.
That's right, she had transmigrated.
She had transmigrated into the world of Demon Slayer... Kimetsu no Yaiba.
The immense popularity of Demon Slayer in her previous life meant that even Tsugikuni Yuko, who didn't usually follow anime, couldn't help but stumble upon related videos. Tsugikuni Yuko was drawn in by its exquisite special effects and art style.
However... she must have transmigrated too early.
Yuko, who had only watched one season of the anime, had only occasionally seen videos about Tsugikuni Yoriichi on short video platforms.
The most famous line, of course, was – What do you take life for!
But if she wasn't mistaken, Tsugikuni Yoriichi, the ceiling of power in Demon Slayer, her cheap second brother.
Should be a character from several hundred years before the start of the plot.
So the question was, how could she survive until the story began?
"Sigh." Yuko, with a wooden flute hanging around her neck, propped her face with both hands, sitting on the steps with a look of melancholy, watching her elder brother, Tsuneguni IwaKatsu, wield a wooden sword and fight with his teacher below, her feet unconsciously swaying.
"Yuko, you can't sit like that, your posture needs to be proper."
Mother Akeno's voice came from behind. Yuko looked back and saw her second brother, Tsugikuni Yoriichi, walking towards them, leaning on Akeno in a spoiled manner.
"Mother." Yuko quickly changed from her relaxed sitting posture to the kneeling posture she still hadn't gotten used to.
Her Mother in her previous life was a lazy gambler who squandered the family's assets and was indifferent to the family, a type she found it hard to respect or like.
As a result, she was completely unable to cope with the overly gentle Akeno.
After sitting up straight, Yuko breathed a sigh of relief and reached out to greet her second brother, who was nestled beside her Mother, "Yo, Yoriichi."
She hadn't expected the legendary power ceiling to be such a spoiled child when he was young.
As soon as her voice fell, Akeno smacked Yuko on the head, "How many times have I told you to call him Brother!"
"Yes, Brother." Yuko rubbed her head in pain, failing to notice the fleeting look of distress in Akeno's brows.
Mother Akeno was a gentle person, but when she got angry, she was surprisingly terrifying.
Facing his unreliable younger sister, Yoriichi just smiled gently.
His gentle Mother and Brother, and his adorable Sister, were Yoriichi's most precious treasures.
Yoriichi helped Mother Akeno to sit down under the long veranda, accompanied by Yuko.
He, meanwhile, went to observe beside his brother Michikatsu.
The teacher instructing Michikatsu in swordsmanship was his father's subordinate. Seeing Yoriichi standing quietly to the side, he couldn't help but hand him a wooden sword, smiling and asking him to try.
Michikatsu, who was sweating profusely and aching all over from his father's subordinate's blows, finally got a moment to rest.
"Mother, Yuko." He came to the veranda and looked up at his Mother and Sister.
"Brother~" Yuko greeted him with a smile, then focused her eyes on the field.
Michikatsu's brow furrowed almost imperceptibly. He looked back, not believing that his weak younger brother could last a few moves against the opponent.
Because he, with all his talent and effort, had never won against his father's subordinate.
However, to everyone's surprise, Yoriichi, who had only learned the grip of the sword from his father's subordinate, launched an attack with lightning speed, striking down the tall adult in the blink of an eye.
Michikatsu's eyes were filled with nothing but shock, and Akeno's mouth was slightly agape in surprise. Only Yuko showed an expression of 'just as expected'.
As expected of the power ceiling, possessing unimaginable strength at just seven years old.
Unlike everyone else's surprise, Yoriichi looked blankly at the bamboo sword in his hand.
He disliked the feeling of striking another person's flesh.
Yoriichi threw down the bamboo sword and sat back on the veranda.
Michikatsu, still in shock, finally came to his senses. He sat down beside Yoriichi and quickly asked, "How did you do that?"
Yoriichi lowered his eyelids and quietly replied, "When he prepares to attack, his lungs will definitely move violently. You just need to clearly see the direction of the bones, the contraction of the muscles, and the flow of blood."
"..."
Yoriichi's words left Michikatsu dumbfounded; he simply couldn't understand what his younger brother was talking about.
Akeno's eyes, however, flickered slightly.
This child, Yoriichi, can see the gods with his eyes.
Yuko's eyes, moreover, lit up; she knew this!
The highest realm of swordsmanship, or rather, martial arts.
Transparent World!
Possessing the ability to see the enemy's weaknesses, attack movements, and conceal one's own presence.
It's like X-ray vision.
"Let's not talk about swordsmanship anymore. I'd rather play Sugoroku and fly kites with Brother and Yuko."
Yoriichi's previous wish was to become the second strongest samurai in this country, but the discomfort of striking another person's body made him completely abandon this wish.
Michikatsu lowered his head, his hands on his thighs clenching secretly.
Yuko playfully patted his shoulder, saying in an old-fashioned tone, "Don't be so tense all the time; occasionally relax your body."
Michikatsu unceremoniously slapped her hand away and left silently, without even bidding farewell to his Mother.
Yuko exhaled deeply.
She knew it.
Yuko, before transmigrating, wasn't very clear about the subsequent development of the main story, but she had seen in short video compilations that Yoriichi's brother became the strongest demon under Demon King Muzan.
Upper Rank One, Kokushibou.
As for the 'Six-Eyed Lemon Demon' that netizens spoke of, she hadn't understood it at the time, but now, she seemed to grasp it a little.
Alright, she absolutely had to correct this kid's twisted mindset!
Yuko felt she could do it. Seriously, she was an adult university student in her previous life.
How hard could it be to guide a child... However, before she could complete the correction of Michikatsu's personality.
A few nights later.
"Yuko."
Yoriichi's voice woke Yuko from her deep sleep. She opened the door, rubbing her eyes, still groggy.
"What's wrong, Yoriichi?" Yuko yawned and looked at Yoriichi, "Are you scared to go to the bathroom alone?"
Facing his unreliable younger sister, Yoriichi's expression was as calm as ever, but this time it seemed to be tinged with a hint of sadness.
"Mother has passed away."
"Eh?" Yuko woke up with a start.
Akeno... Yuko opened her mouth, somewhat speechless.
"You can ask Mother's attendant for the details," Yoriichi said quietly. "I'm going to bid farewell to Brother now."
"Bid farewell?"
"I'm going to the temple."
Only then did Yuko notice the travel bag Yoriichi had placed beside him.
Their father was a superstitious man. Yoriichi, born with an ugly Demon Slayer Mark among the twins, was not valued by his father. If not for Mother Akeno's protection, Yoriichi would have died at his father's hands at birth.
In comparison, the treatment between Yoriichi and Michikatsu was so different it could be described as the gap between master and servant.
From clothing, food, shelter, and transportation to education, the two were people from different worlds.
And as the abandoned one, Yoriichi had to go to the temple when he turned ten.
To become a monk.
But... Yoriichi and Michikatsu were only seven years old now.
Yuko was only six.
Yuko suddenly remembered the scene where Yoriichi had defeated his father's subordinate earlier.
Their father needed an heir who could take over as the family's pillar. Yoriichi's display of immense talent had already reversed his situation with Michikatsu.
Was it to avoid affecting Michikatsu that Yoriichi chose to become a monk early?
While Yuko was momentarily stunned, Yoriichi said, "Yuko, I'm leaving."
"Please take care of yourself."
With that, Yoriichi picked up his travel bag and prepared to leave.
"Wait." Yuko instinctively called out.
Yoriichi paused and looked at her.
When it was Yuko's turn to speak, her mind went blank, and she didn't know what to say.
Should she ask him to stay?
A seven-year-old child... but Yoriichi could already defeat adults, far stronger than her.
A gentle smile was the response to his silent sister.