If you mean the NSFW portion, I can (and will) definitely add a warning. If you mean some of the themes, please let me know which ones you thought need a warning. Either way, well done, and thank you for the kind words!
I had tagged the game as erotic, but it's not super obvious on the game page, and I can see how it would be kind of a surprise given the rest of the route. I have added NSFW to the description as well as the title of the builds, and I really appreciate that feedback! Hopefully this helps other players to be prepared in the future.