Hello!
First of all, thank you so, so much for taking the time to give us such a detailed review! We really appreciate it a lot (and spent time reading it over and over again!)
We are glad you enjoyed Serin's route :D From our perspective, we had a lot of fun figuring out Serin's personality too! (Even though we also spent a lot of time teasing him.)
The normal mode is quite hard even for some of our team members! You being able to finish the game in it is quite an achievement, even if you say you're normally bad at stats raising :D ! We're glad you enjoyed the system too!
For the music tracks, since they're royalty-free assets (we spent a lot of time hunting xD) we won't be able to sell them. But we'll put the composer's links onto our page soon so you can check them out! :D Their music is delightful.
At last, thank you again for playing and your comment! We wish you a nice day and take care!