There's not really SFW versions of anything, SFW is pretty much the "streamer mode" that's very lazily tacked on and only might be properly worked on way down the line.
I don't like the idea of having warning messages but that is a good suggestion, I could have an "on", "off" and a "warn" option. I can't really implement warnings for certain scenes (the small in-combat ones) but I can for all the bigger scenes and it'd be pretty easy to implement when I have time for it. I assumed you might've quit after the cat-girl ending but I assume you must've played through with futa both on and off since I've done my best to hide any evidence of where the futa content is for non-futa-ers. Thanks for playing!