The author of the novel," The Demon Brother is by My Side," was Butterfly Monarch. The female protagonist, Lin Wan 'er, met a mysterious person in an accident. This person told her that he had a demon brother and that his brother was trapped in the city where Lin Wan' er lived. And so, Lin Wan 'er and her demon brother began a wonderful journey, experiencing many dangers and challenges. The plot of the novel was full of ups and downs, and the characters were vivid. It was a well-received fantasy novel. If you want to read the entire novel, you can search for " Demon Brother is by My Side " on various online novel platforms to read it.