"Ah—"
"The history of Flame Breathing is very long, but I've truly never heard of Hinokami Kagura. It's certainly a good thing that your father's Kagura dance can be used in battle, but let's end this topic here for now!" "Um~ Could you perhaps say a few more words?" "Become my Tsuguko! I'll look after you~" "........" When you talk to Tanjiro, where exactly are your eyes looking?
Next, Rengoku Kyojuro began to explain the origin of Breathing Styles. The earliest, most primitive Breathing Styles were divided into five major attributes. These were: Flame, Water, Thunder, Wind, and Stone. Later, many geniuses, based on their own compatibility, improved and invented many derivative Breathing Styles. The derivative of Flame Breathing is Love Breathing. The derivatives of Water Breathing are Flower, Insect, and Serpent Breathing. The derivative of Thunder Breathing is Sound Breathing. And the derivative of Wind Breathing is Mist Breathing.
[Just like the major chakra natures in the Shinobi World,] Uchiha Nagi thought to himself. And in the Shinobi World, beyond the five basic natures, there were the higher Yin and Yang natures. For example, the Nara clan's Shadow Secret Jutsu was a type of Yin Release, while the Akimichi clan's secret jutsu was a type of Yang Release. In Breathing Styles, these corresponded to Moon Breathing and Sun Breathing. Although Moon Breathing was derived from Sun Breathing, neither was inherently stronger or weaker than the other. The difference was that the founder of Sun Breathing possessed swordsmanship so overwhelmingly powerful that it created this misconception.
"What color are your swords?" Rengoku Kyojuro asked curiously. Tanjiro said, "Mine is black~" Inosuke said, "Mine is dark blue~" Zenitsu said, "Mine is gold~" Uchiha Nagi didn't speak, simply drawing his Nichirin blade for them to see.
"Oh~ Excellent! The same color as mine! Then, you should all come and train with me! I will teach you well! Hahahaha~" Seeing that Uchiha Nagi's blade was the same color as his, Rengoku Kyojuro became greatly excited. A new member with the same attribute, and crucially, one who became a Hashira upon entry, just like Muichiro—so powerful and from the same school of sorts—it made him uncontrollably happy. He was even happier than if he had taken on three Tsuguko. Although Nagi had a peculiar personality, he was generous, straightforward, and passionate, with a disposition as fiery as flames. It was no wonder he was recognized by the Demon Slayer Corps as a "Big Brother" figure.
Tanjiro blinked. To his special sense of smell, if Uchiha Nagi's scent was like summer ice, then the Flame Hashira's scent was like a winter fire.
"You all need to be careful. There's a demon hidden on this train. Don't let your guard down..." Uchiha Nagi interjected.
"Ah~~ There's a demon! I want to get off! I want to get off....." As soon as he heard "demon," Zenitsu's cowardly nature flared up again, and he struggled to jump out the window. "You bastard, stay put! Lord Inosuke is here, what's there to be afraid of~" Inosuke roared, casually grabbing Zenitsu to stop him from running. Previously, it was Zenitsu holding onto him; now, it was him holding onto Zenitsu— "I don't want to! I want to get off! I'm scared~ Woo woo~~" Zenitsu's tears and snot streamed down his face.
[Attention passengers, please present your tickets.] A ticket inspector walked by, checking tickets with the surrounding people.
Sniff sniff~
"There's an ominous smell~" Tanjiro suddenly smelled something strange. Then, in the next second, everyone around them began to fall asleep, sinking into a deep slumber, including Rengoku Kyojuro and Uchiha Nagi.
"Watch out, an enemy is here~" Rengoku Kyojuro suddenly stood up, drawing his Nichirin blade. "Such a large body, yet it can hide itself. Is it a Blood Demon Art?" At this moment, a massive figure with a head covered in eyes suddenly appeared, clinging on the roof of the train like a spider, its body having several pairs of arms and legs firmly gripping the roof.
"ROAR—" The large-eyed spider-demon roared, baring its fanged maw.
"Flame Breathing, First Form: Unknowing Fire~" A flash of flame swept past. Before the opponent could react, its head was already rolling on the ground, its body beginning to burn to ash—
"Amazing! Big Brother, take me as your disciple~" Tanjiro clung to his leg. "Me too, me too~" Zenitsu was teary-eyed. "I want to as well~" Inosuke was excited. "Big Brother, from now on, you're my Big Brother! I'll follow you!" Uchiha Nagi said, tearfully. "Hahahaha! Alright, alright! I'll take you all as my disciples—" Rengoku Kyojuro laughed heartily.
"This is? Modern times?" Uchiha Nagi looked with emotion at the familiar world around him. At this moment, he was in a modern metropolis. All around were streets bustling with people. On an overpass above a main road, a large crowd was queuing to cross. This was the center of a super-first-tier city from his previous life. After crossing the overpass, a main road led to a shopping street inside. Outside the main road were several pillars, on which were written a few characters: [Dongmen Pedestrian Street].
The moment Uchiha Nagi entered this world, he already knew what was happening. The Mangekyo Sharingan was the progenitor of genjutsu; he just didn't know how the opponent had managed to draw him into an illusion. Having transmigrated for so many years, many memories had long since blurred; he only remembered the gist of things. However, after entering this mental world, Uchiha Nagi wasn't in a hurry to leave. Instead, he began to stroll around with great interest, because in his later years in his previous life, after the internet developed, such scenes of packed crowds were no longer seen.
"What a distant memory. Even I can barely recall this scene," Uchiha Nagi sighed. "Nine ninety-nine! Nine ninety-nine! Special price clothes, nine ninety-nine a piece! Don't miss out when you pass by~" "Handsome, come in and take a look! The latest model running shoes, fifty percent off, buy one get one free~" After walking into the pedestrian street, the shops on both sides had young, vibrant, and down-to-earth girls waving megaphones. They stood boldly and enthusiastically at the entrances of various shops, waving their hands to attract customers to their clothing stores. The people around looked strangely at Uchiha Nagi, this person in ancient-style clothing.
Uchiha Nagi, rather interested, walked into a sportswear store and bought a set of clothes, changing out of his anachronistic attire. After coming out, he walked to a snack street, Dongmenzhen Food Street... A short while later, thoroughly satisfied, he held a large skewer of squid in his left hand and several bags of roasted meat and chicken wings in his right, his mouth glistening with oil.
"Although I can barely remember it, and it tastes just so-so, the taste of home is just this delicious. Hehe~" Uchiha Nagi suddenly remembered something and blinked. "Right, since I'm here, I might as well experience some games." With that, Uchiha Nagi hurried towards an arcade. Before even entering, he heard many deafening sounds. This kind of place had slowly been phased out later on due to the advancement of various other games. Basically, the remaining arcade machines were mostly for dancing, basketball, or fishing games. Now, in this dream world, the arcade was neatly lined with various arcade machines: King of Fighters '97, Cadillacs and Dinosaurs, Warriors of Fate...