If the "Demon Slayer Mark" was a contagious virus that made nearby Breathing swordsmen stronger, then in a sense, Tanjiro was a virus to rival it. After all, how could anyone stay beside him, see how hard he worked, and resist putting in the same effort?
During the time Chinatsu was unconscious, none of the nine Pillars stopped training.
Some worked toward attaining the "Transparent World," while others gathered to hone their swordsmanship.
They still had enormous untapped potential, and it was precisely because that potential was so great that awakening their marks brought such a dramatic improvement.
Sparring with Muichiro benefited not only Tanjiro, but Muichiro as well.
They trained from morning until dusk. Panting heavily, Tanjiro lost his footing and fell to the ground. Muichiro hurried over to help him up and asked, "Tanjiro, are you all right?"
Tanjiro waved a hand as he gasped for breath. "I'm... I'm fine. Let's... let's go again..."
Though the "flame" of his body had grown faint, the "flame" of his spirit still burned fiercely. Hard work was certainly a good thing, but Tanjiro had clearly taken it too far.
Seeing him like this, Muichiro was trying to find the right words to persuade him to stop when Tanjiro suddenly turned to look behind him.
Puzzled, Muichiro tilted his head and followed Tanjiro's gaze. A few seconds later, a girl with thoroughly disheveled hair emerged from inside, stretching luxuriously.
"Sis!!!"
Delighted, Tanjiro was about to run straight to Chinatsu, but at that instant, the word "virus," which she had mentioned before falling unconscious, suddenly surfaced in his mind and made him freeze.
Seeing how awkwardly Tanjiro had stiffened, Chinatsu smiled and waved a hand. "It's fine now. Just a little virus. I've already dealt with it. Back in the day, I took