Compared to My Master, I'm Still a Hundred Times Worse

The power system of Demon Slayer: Kimetsu no Yaiba was unlike that of the Naruto World, which had simple divisions like Genin, Chunin, and Jonin. Moreover, the strength systems of demons and human swordsmen were completely different.

First came the Demon Slayer Corps on the human side.

Their cultivation realm could roughly be divided into several tiers.

The first tier consisted of those who had mastered basic Breathing Styles—the most ordinary human swordsmen.

The second tier consisted of those who had mastered the Total Concentration state within the Breathing Styles. They could unleash extremely powerful strength for a short time, but human swordsmen at this level were still slightly weaker than the Lower Ranks of the Twelve Kizuki.

The third tier was mastery of Total Concentration Constant. As the name implied, it allowed one to remain in a state of Total Concentration at all times, constantly in an explosive state. Their physical constitution and strength would undergo a tremendous leap.

Once one mastered Total Concentration Constant, their strength would be fully comparable to that of a Lower Rank of the Twelve Kizuki.

Furthermore, after completing the training for Total Concentration Constant, their strength would not stop growing. Instead, because they remained in that state at all times, their power and physique would continue to improve, steadily becoming stronger over roughly two to three years.

After mastering Total Concentration Constant and maintaining it for more than two years, one would reach the level of a "Hashira" in the Demon Slayer Corps. Beings at this level could generally kill the Lower Ranks of the Twelve Kizuki with ease.

All Hashira were basically at this level.

However, among the Twelve Kizuki, there was an almost insurmountable gap between the six Lower Ranks and the six Upper Ranks. The top three of the Twelve