Hi there! I apologize if my previous comment sounded a bit rude. I just pointed out those two problems because I wanted to help to improve this game. Those are just two minor things and guess what? I've just finished the DLC and those were the only issues I found.
I really loved the story and it made me realize that I like romance stories, I enjoyed it very much.
Thank you for making this!
By the way, regarding the issue with the voice volume, I have to confess that I actually fixed it myself. I downloaded a certain tool, extracted the voice tracks, and then used an Audacity macro to increase the volume of those tracks by +9db (with the Amplify effect). Finally I repackaged it and enjoyed a good voice volume for the rest of the story. So if you are planning on fixing that, a simple Audacity macro is all it takes.