An honestly amazing demo. It hit all the nostalgia points for me with the art style, being inspired by classic Shoujo manga and anime, but it has a great charm of its own. It's a simple story and is not afraid of just taking its inspirations and running with it. The designs are great, presentation immaculate, and I have to give particular kudos to the sound design. There's a couple of scenes where the SFX used hit absolutely right!
Only point where I feel it can be improved on more is the menus. There are certain elements that feel too much like the basic Ren'py fare, but not too many to bother. Most of the GUI is perfectly in line with the aesthetics of the rest of the game. Also, it has no voice acting but that's not a detriment: just something to keep in mind for people going into this.
Can't wait to see where the game goes next!