Ghostly Brother-in-Law, Please Spare Me

Gee, no wonder no one watched it. I couldn't stand it until Chapter 9. For normal people, the plot is really rubbish. My sister and best friend are all dead, and they turn into ghosts and want to harm you. I don't know what to learn. I always rely on the male protagonist and he behaves inexplicably. . . . What a waste, the novel is just a novel, I am speechless.