Over the next few days, Uchiha Nagi enjoyed a rare period of leisure, free from life-or-death crises and persecution from Konoha's higher-ups.
Here, Kagaya Ubuyashiki was exceptionally kind to the members of the Demon Slayer Corps; due to his own condition, he couldn't even wield a sword ten times, so all he could do was provide the best possible treatment for the Demon Slayer Corps members.
To eliminate more of Muzan's subordinates, he never kept any Demon Slayer Corps member to protect himself.
During Uchiha Nagi's days off, Kagaya Ubuyashiki sent someone to deliver all the Breathing Technique scrolls as a thank you for his Medical Ninjutsu, though so far, besides Muichiro, no one else had managed to extract Chakra.
Of course, Uchiha Nagi knew that these Breathing Techniques were not entirely complete, as the current generation of Pillars were all exceptional, and each had invented a new form; simply reading the scrolls might not be enough to learn the final form.
Uchiha Nagi also gave him the method for creating Exploding Tags, which Kagaya Ubuyashiki took very seriously, stating that he would do his best to try and replicate them.
However, due to different materials in this world, he wasn't sure when they would succeed, and Exploding Tags also required Chakra to be made.
"Maintain the Breathing Technique at all times? Even while sleeping?" Uchiha Nagi asked curiously.
"Mhm~ Most of the Pillars can do it, you know. Constantly maintaining the Breathing Technique allows you to grow stronger day by day, and eventually, your physical body will strengthen over time to a degree where you can fight demons," Shinobu Kocho said with a smile.
"I'll try my best," Uchiha Nagi replied.
"You can do it, Nagi-kun! Don't lose to those three," Shinobu Kocho said, gently holding Uchiha Nagi's hand encouragingly.
Uchiha Nagi: "..."
If he hadn't seen her being equally gentle with the three little ones, he would have suspected she was interested in him.
"Oh, oh, I need to train hard today too! I'll maintain the Breathing Technique while breathing, sleeping, and awake!"
"Damn you, blondie, don't get ahead of yourself! I'll definitely achieve it before you guys!"
The three little ones, encouraged by Shinobu Kocho's gentle touch, were like teenagers who had never seen such a mature beauty, becoming incredibly energetic as if they'd been given an aphrodisiac, yelling and starting to train wildly.
"Mr. Nagi, your nichirin blade and uniform have arrived."
That day, Shinobu Kocho's tsuguko, Kanao Tsuyuri, came to inform him.
The Demon Slayer Corps uniforms are custom-made, providing strong protection, being cut-resistant, fire-resistant, and warm in winter while cool in summer.
As for nichirin blades, each person receives one, and the nichirin blades for Pillar-level demon slayers are highly valued, specially crafted by the swordsmiths of the Swordsmith Village.
"Ah, Inosuke, our swords are here!" Tanjiro excitedly found him.
"Really? Oh, oh, the swords are here, the swords are here!" Inosuke also jumped up happily, as his sword was also broken.
Uchiha Nagi, Inosuke, and Tanjiro waited for the arrival of the swordsmiths from the Swordsmith Village.
"Tanjiro, you idiot! You actually broke my sword!"
From afar, a masked man hadn't even arrived yet but was already brandishing his sword, chasing Tanjiro with murderous intent.
"Ah, ah, I'm sorry, Mr. Haganezuka! I didn't mean to, and the demon was very strong!"
"Idiot! It's your fault for breaking the sword!"
Then, Uchiha Nagi saw two people, one running and one chasing.
Of course, the other person was just excessively fond of his sword and was venting his emotions; he wasn't actually trying to kill Tanjiro.
------
"Quick, try it! What color is the sword?" Haganezuka looked at Inosuke and Uchiha Nagi with anticipation.
Before being used, all nichirin blades are colorless, but once a member of the Demon Slayer Corps begins to use it, the energy from their Breathing Technique will cause it to change color.
Tanjiro's, however, was black, which baffled Haganezuka, as Water Breathing shouldn't logically be black.
"Oh, oh, dark blue," Haganezuka said, looking at Inosuke's sword with some disappointment.
"Ah, it's your turn! Hurry up and let me see what color yours is."
Everyone looked at Uchiha Nagi with anticipation as he slowly picked up the smooth nichirin blade that reflected his face.
Then, he slowly channeled his Chakra into it.
Whether it was the energy from a Breathing Technique or Chakra, they were fundamentally the same; the nichirin blade would only change color according to the individual's attribute.
"Oh, oh, a flame-like color! Flame Breathing!" Haganezuka was overjoyed; the color of the nichirin blade represented its attribute.
[It seems I'm predominantly fire-attributed, but the Uchiha Clan has always been like this.]
Uchiha Nagi wasn't too surprised by this result; the Uchiha Clan had always leaned towards the fire attribute, but other attributes could be developed later, so Uchiha Nagi didn't care much.
Clang—
Clang—
Before anyone knew it, Xiao Zhuzhu Inosuke was already in the yard, using a stone to furiously hammer his nichirin blade; he liked to make serrations on his sword...
"You idiot! How dare you treat my sword like that! I'm going to kill you—"
The swordsmith who came with Haganezuka, seeing Inosuke abuse the sword like that, immediately became furious, even wanting to kill him...
At night, Uchiha Nagi opened his Mangekyo in his room and began to hypnotize himself in front of a mirror: to maintain the Breathing Technique at all times, something ordinary people simply couldn't do.
In his previous life, he had encountered yoga, which also emphasized Breathing Techniques, but people could only maintain the Breathing Technique when they remembered; once they forgot, they would revert to their normal breathing state.
Uchiha Nagi was self-aware that he wasn't a genius, nor a child of destiny, so he could only rely on cheating to remind himself.
The Mangekyo's hypnosis was used to make his subconscious never forget to maintain the Breathing Technique.
This was an extremely difficult thing to do, because you can deceive others, but you cannot deceive yourself.
However, Uchiha Nagi used the Mangekyo's hypnosis as an alarm clock; once he was reminded of the Breathing Technique, he would remember it, and through maintaining it 24 hours a day, he would slowly get used to it.
After doing all this, Uchiha Nagi jumped onto the rooftop and began to meditate.
After a while, feeling a bit bored, he picked up a musical instrument and started playing a tune.
"Which one should I play? Let's go with the snow scene one~" Uchiha Nagi played a pure instrumental BMG from an anime in his previous life, from Naruto, whose name he had forgotten.
It was a pure instrumental piece from Naruto with a snowy background, like a lonely person walking through the snow.
Under the night sky, a beautiful melody drifted over the Butterfly Mansion, and many people heard it.
A petite, graceful figure silently landed behind Uchiha Nagi.
Because there was no killing intent, Uchiha Nagi only realized someone was approaching when he smelled a feminine scent.
Startled, it was like someone suddenly scared him from behind, especially for a Ninja, a sensitive profession.
Uchiha Nagi instinctively turned his head, and his lips accidentally touched another pair of equally warm, crimson lips.
White teeth clinked against crimson lips, and a cry of surprise escaped—
"Ah—"
Hiss... that hurt.