Kimetsu no Yaiba: Shiawase no Hana

Demon Slayer: Kimetsu no Yaiba - The Flower of Happiness

Kimetsu no Yaiba: Flower of Happiness (鬼き滅めつの刃やいば: しあわせの花はな Kimetsu no Yaiba: Shiawase no Hana?) is the first light novel series from the Kimetsu no Yaiba (Manga) written by Aya Yajima.