Almost-Invisible Female Characters in Coiling Dragon

Abstract: Coiling Dragon (by I eat Tomatoes) has an almost "unreadable" side for female readers. There are a lot of nameless female characters in the book. A lot of supporting characters, including the woman the main character falls in love with, their romantic relationship, and the woman he marries. Yet, all of them either stand out thanks to their connection with the main character or they don't come out at all. There is almost no part for these female characters, no specific story, or a deep background.