There's a a little bit of nudity sprinkled throughout the game, but not in an inappropriate way.
There's a little cussing. Not bad at all though.
STAY AWAY FROM TORULF IF YOURE TRYING TO STAY AWAY FROM NSFW. You do have the ability to turn off the nsfw scenes, but torulf is a bad dude to begin with
Overall, I would say this game is safe if a little dense with thematic existentialism and nihilism in some ways. It really encapsulates the power of connection. In a bleak setting.