I see this game will not end at 0.9 version, because this is 0.7 version and we have teasing scenes only, even at the alpha path, the MC reacts more than acts, it looks like the Mom's boss has full control over her in both paths and about the sister scene, there's bugfix file in this thread. The school scenes are just a loop, there are few differences(in general is: mini-exam, talk, talk and talk about the next mini-exam) and it means that you have to wait for some updates to have real content. The game started promising, but now it's not worthy to download now and I recommend you wait for at least 4 updates for solid content in the alpha path.