Demon Slayer: My Level-Up System Makes Muzan Beg for Mercy

After a mortifying transmigration into the world of Demon Slayer, I became the eldest son of the Kamado family, whose household had just been slaughtered, and Tanjiro's big brother. I set out to hunt demons to protect my younger siblings, but when Muzan hunted me down and drove me to the brink, I unexpectedly awakened a character profile. Every demon I slay earns me attribute points. Max out my strength and I can punch a Lower Rank to pieces; push my agility past a hundred and I can teleport to take off heads; strengthen my mind and I can see the fatal flaw in Muzan! When Muzan Kibutsuji knelt before me and begged for eternal life, I planted my foot on his neck and chuckled, “Now you know how to beg for mercy?”