This was very moving to read!
Reviewing comments like this is a surreal experience for me not just as a hobby VN developer, but as the developer of Perfect Pitch specifically. And I say this because so much of the impression you've shared above reflects in near identical fashion that which inspired me to create the project in the first place.
I think it's in our nature as human beings to chase rich, visceral emotional experiences. That's probably not only the foundation which undergirds the development Perfect Pitch, but maybe even the thesis for the game itself. Perhaps it would sound strange to a player to hear me say, but having completed the production of this update, I've also had the experience of a profoundly hollow feeling accompanying me this past month. A very natural, very human consequence of traversing the 2-year liminal space I found myself in when writing this update.
You've drawn attention to a number of personal connections you've made with characters and events in playing the game, and I really admire you for sharing that. When I put this project out into the world, there's really no way of me knowing what the impact will be. Comments like this show that the solitary hours typing away at my computer can create profound moments for others in ways that others have done for me.