What's wrong? "It's not working" is kind of vague.
Did you check the wiki https://wiki.andrealphusgames.com/wiki/How_to_add_DLC
What's wrong? "It's not working" is kind of vague.
Did you check the wiki https://wiki.andrealphusgames.com/wiki/How_to_add_DLC
Ok.... Let's try again.
First things first and just to be sure.
For A Fistful Of Waifu is additional content. Meaning you need to have the main game Love and Sex: Second Base installed and working.
Do you have the main game Love and Sex: Second Base installed and working ?
If the main game is not working, there's no need to dig further and we'll focus on the main game first.
If the main game is working, let see about FAFOW DLC.
As explained on the wiki FAFOW DLC is a single file named dlc_fafow.rpa. If the file you've downloaded is a zip file you'll need to extract it before the next step.
This file must be placed in the Documents see the manual import.
If you did everything listed on the wiki but it still doesn't work, I need you to explain me what you see before the crash.
When the issue occurs, what do you see?