Demon Slayer: The Journey That Began When I Became Yoriichi's Sister

[Orange + Slow Burn + Healing + Single Female Lead] Transmigrated into the body of Yoriichi Tsugikuni, the pinnacle of Demon Slayer, she joins the Demon Slayer Corps, creates her own Snow Breathing technique, and becomes the second swordsman after Yoriichi to master the Demon Slayer Mark. Yuuko originally wanted to change Iwakatsu's future as a demon, but unexpectedly… Iwakatsu: Yuuko, you'll become a demon too. … Note before reading: This book is tentatively set to have a single female lead, Orange. The female lead is Shinobu Kocho. If you don't like this, please don't read.