Just finished playing the demo and - wow. I am really looking foward to the full release.
The art is amazing: all the characters are beautiful and the backgrounds are incredible. I simply adore the style. It was a nice little touch to have characters change clothes, which isn't something you see very often (and man, Prince's shirt for relaxing is great).
The writing is also incredibly nice. It is only the first two days, but I already like all the chracters. None of them seemed flat to me, even Kitty, Nana and Isabelle who didn't have all that much screentime. This made me incredibly happy and I kind of want to play it just to see more of them.
I'm also really excited that Prince is a trans guy. There isn't nearly enough of that and it was worked in so nicely too... Oh, man. This is a really good demo. Good job.