Review Detail of Kuromego in Transmigration in Against the Gods (AU)

I don't know if this fanfic is good or not, as I will be reading it at the moment, but just to confirm one thing, at least this fanfic is without a harem, right? If it is, I appreciate it, because I am tired of seeing a lot with wish fulfillment, and the intention is to read more about the history of the world even though I am not canon