Review Detail of AleccrimD in Commonwealth

I am one of those Readers who read your other novel and came to this one because you thought that fanfic was so good. So I have to ask ... What's the difference from that novel to this one?(Besides the other being a fanfic, of course) because I really want to know why this novel is not rated as well as the other. And one more curiosity, is this novel Harem like the other? In other words, does the MC have more than one woman?