Oh no, as far as I know, there is no walkthrough...
When I was lost or when I wanted to do something but was not allowed to because of some decision I made in the past, I would google something like this:
"lustful desires" +whatIwantToKnow.
Remember to use quotation marks on "lustful desires" so google doesn't send you somewhere else xd
Of course, you can also join the game's discord and ask questions there :3
I also recommend saving a lot, there is a feature to name your saves, so you don't forget which is which :3