Although Wise Fools Game and this prequel are not horror games, there are horror game elements to them.
Perhaps creepy is the best way to describe it. (I was heavily inspired to start making games by the RPG Maker game OFF, especially in terms of overall gameplay environment).

There are things such as references to violence, trauma, substance abuse/addiction, and so on.

That said, I believe it’s a small enough part of both this prequel and the actual game that most people shouldn’t be worried. But I made this post so that I didn’t catch anyone off guard who’s very sensitive to these types of things and thinking that this about a walk in the park or something.
Anyway, thanks for reading.