This can be a very cool game. There is a big potential ! About the text box when the charas speak, download the game Nocturne (it's also on this website)... and see how the developer added the "ballons". It's the best way to do it.
wow. the intro is very ... emotional !The music with the piano is... perfect! Also the game looks interesting. I suggest you to improve the ui. replace the style of the font and of the text box. For the ballon you should use a different text box. So, very interesting ! I follow ! This can be a very big game !