Escaping an arranged marriage, (Y/n) came across the famous water hashira Urokodaki. Taking her under his wing, Urokodaki decided to train her into a strong demon slayer. During her stay, a boy named Tanjiro and his sister Nezuko arrive and they both decide to train together in order to save Nezuko. What (Y/n) didn't expect was catching the attention of demon slayers,hashiras and demons.