Kimetsu no Yaiba Novelization 6

Demon Slayer Novelization: Breaking into the Infinity Castle! Shinobu's Thoughts Arc (鬼滅の刃 ノベライズ ~無限城突入! しのぶの想い編~), written by Shuka Matsuda, is the sixth light novel based on the Kimetsu no Yaiba manga. The illustrations are created by Koyoharu Gotoge.

Synopsis
Demon Slayer Corps founder Kagaya is confronted by Muzan!

Tanjiro joins the Demon Slayer Corps in order to save his sister Nezuko, who has turned into a demon, and to avenge his family’s death. The Demon Slayer Corps begins the “Hashira Training,” aimed at training the Demon Slayers and developing the Hashira, but the leader of the Corps, Kagaya Ubuyashiki, is confronted by Muzan Kibutsuji, the Demon King! It also includes Shinobu Kocho’s battle with Twelve Kizuki member Doma!