The demo has limited content. But I find this game really enjoyable. So when game gets released Im gonna support the developer but Im not gonna play the game until it gets machine translated.
I have spent 3-4 hours playing the demo and trying out new classes, spells and tactics and such.
The problem is that it is still you as a player that has to pick the NTR event and the night time NTR events. So it still feels like you as a player is controlling the unfolding of the events.
Check my file to see the difference between your file and the trial. As you can see your file has dots instead of the characters.
So in order to get the game to work I moved over the audio file from the trial.
And about your proof walk up and left and watch the thugs and the girl and the game...
I have jap OS and everything and works with most of the games. But this one I don't get the right words. So the problem is not the jap settings but most likely the file.
I can download the trial and everything there works just fine.