The story typically revolves around the "Mazome Soapland," a brothel that is unpopular or struggling ("Mazome" implies something mixed, chaotic, or sometimes a specific term in the adult industry context, but often refers to an "unpopular" or specific niche establishment). The narrative usually focuses on the interactions between the male protagonist and the female attendants working there. Unlike standard romance tropes, this is a strictly 18+ (Adult) title focusing on the dynamics of paid companionship, often blending comedy with explicit service scenes.
"Mazome: The Dark History" seems to be a bit confusing as there's a possibility of confusion with other titles. Assuming you are referring to a series or media related to "" or similar: mazome soap de aimashou upd free