How are you supposed to progress in this game?
Going to school and studying at home amounts to nothing, no progression after you have reached grade E, as you loose everything you gained when sleeping.
There is no use for money, so why can you work?
There isn't
Friends:
Remu, there is no way of telling if the game has registered you talking to her and nothing new seems to happen.
You can't study with Mei, so progression is stuck here.
You can't progress with Ami as you are stuck at grade E.
Karen, as I don't seem to progress with Remu, this seems to be unavaiable.
Teachers:
Generally locked as progression with other persons are stuck and grade progression isn't possible.