1977, and the demon war is still raging, after the leader of the demons, Muzan, split his soul into 12 demons and spread across japan, meanwhile you, a 17 year old girl named Akarui Bureizo, the 5th child of the Current Flame Hashira: Karafuru Bureizo, has been at home all day with your best friend and tutor, the soon to be "Magnesium" Hashira: Arukari Kinzoku, when suddenly one of the 12 pieces of Muzan arrives in your house and attacks you and Arukari, what do you do?