I transmigrated into the world of Demon Slayer and became Tsugikuni Gen.
While Tanjiro was feeling his way through Water Breathing, my [Martial Arts Mastery] had already begun to break down the scientific principles behind Breathing Styles.
While everyone else used curved swords to behead demons, my Tang Hengdao was made for one thing: piercing through them!
Giyu Tomioka said my path was wrong.
Sakonji Urokodaki couldn't make sense of my forms.
But Shinobu Kocho developed a keen interest in my "analysis of human biomechanics."
As the tragedy at Mount Natagumo was about to repeat itself, and the whistle of the Mugen Train sounded once more,
I stood with my blade in hand, the pale gray Breath of the Beginning flowing along its edge.
This time, the blade of science will cut down every regret!
