* This book is an option & cyoa book* A girl named Y/N L/N lives with her family in a village. Soon, a tragedy happens. Her dearest friend, Yuriko Kai, dies to the hands of a demon. By this loss, she decides to join the demon slayer corps to protect the innocent lives that might or had been taken by demons. Everything was doing great for Y/N until that day came.... She failed to keep her promise. I do not own the cover. I just found it in pinterest, so if you know the creator, please tell me so I can credit them thxxx!!