The short answer is: I’m using 18+ as a general umbrella for anything adult, which may include NSFW. So if anyone wants to avoid NSFW, this game may not be for them.
The longer answer is: I’ve been ambiguous about it intentionally because while I am not presently planning on any specific explicit scenes, I want the freedom to include them if I decide it’s meaningful to do so.
However, if I call the game NSFW, then there’s an expectation for sex scenes, which may upset readers if I ultimately decide not to include them. If I don’t call the game NSFW but then include sex scenes, I’ll potentially upset those who are reading the game to avoid NSFW.
It is a complicated space to exist, so I’m trying to be thoughtful about it.