Nuriel is a demon who has been hiding from people for a long time, but when she meets the boy, she considers him a friend, but she never thought that he would be the reason for the end of the demon race. That's why she was so angry that he cursed the people who killed them in exchange for her life, but she never thought that she would be reincarnated in the same world but in a different body. Can she get her revenge, or will she have a change of heart?