Time flew by, and Tetsuya and Izuna spent seven days on Mount Sagiri.
Over those seven days, the two of them completely mastered Water Breathing.
With those two monsters putting pressure on them, Giyu and Sabito doubled their efforts as well, bringing their understanding of Water Breathing to a new level within those seven days.
One peaceful morning, Sabito and Giyu continued refining their Water Breathing under Izuna's guidance.
Meanwhile, Tetsuya sat cross-legged on a boulder, trying to reverse-engineer Sun Breathing from his understanding of Water Breathing.
As everyone knew, Breathing Styles had been created by Yoriichi Tsugikuni, and the style Yoriichi originally used was Sun Breathing.
However, not everyone could use Sun Breathing.
With Yoriichi Tsugikuni's help, the members of the Demon Slayer Corps had therefore derived five fundamental Breathing Styles from Sun Breathing: Wind Breathing, Water Breathing, Flame Breathing, Thunder Breathing, and Stone Breathing.
Later swordsmen had derived even more distinctive Breathing Styles from those five fundamental styles, such as Flower Breathing, Insect Breathing, and so on.
Since I know for certain that Water Breathing evolved from Sun Breathing, couldn't I work backward to reconstruct Sun Breathing?
Of course, he was only doing this because he had nothing else to do and wanted some entertainment.
If he really wanted to study Sun Breathing, he could simply leave and head to Mount Kumotori to find the Kamado family.
The ritual dance passed down through the Kamado family, Hinokami Kagura, had evolved from the Sun Breathing that Yoriichi Tsugikuni had personally demonstrated.
Clang!
A clear ringing came from the front yard, as though someone had arrived.
"Finally here. They certainly kept us waiting."
Tetsuya snapped out of his thoughts and jumped down from the boulder.
"All right, let's leave it there for today."
Izuna, who had been instructing Sabito and