Howdy there, I would like to say that I did not expect to fall in love with your game (not wanting to be rude like that or anything). I did just rate your game but I don't know if you can read it or not so I just want to say that I absolutely love all your work that you have done so far and I can't wait for the continuation of the story. It hurts not being able to continue a story you feel so attached to :(
I definitely agree that the question is very tough especially with how well they have all been written and portrayed, oh how I would absolutely love to have them all be No. 1 because they are all amazing in their own little ways.
But I would have to say that Suzu is my favourite ever since you first get to see her in the school, but every other girl also deserves No. 1 because of the previous point where they are all amazing in their own ways