Who is real and Who is fake "BEAUTY'S DEVIL GUARD OR THIS BOOK"

As I was reading the start is good I also thought that it’s only a coincidence butas I continue reading the following chapters I realized that it has the same story plot as the “BEAUTY’S DEVIL GUARD”which is also an online novel and I’m currently reading but because of bricks shortage I stopped temporarily that’s why I downloaded this novel I never thought that this story has the same story plot as that of the BEAUTY’S DEVIL GUARD….so which one is the real one and which one is the fake or copy