Game version 1.25 I believe? After I finished the exam scene on saturday and went to work, there's an that's preventing me from going home to sleep, saying that I still had to take the exam and when I click the school, it says that I needed to go home.
This is a stucking bug. If you manage to reach night without doing the second part of the exam, you have no chance to go on.
If you have an older savefile you can easy reload from there.
Or you can save, open this in texteditor, search for "daytime" and change it to "daytime":3 (or1,2), then save this again and reload in game.
You find the saves in windows here.
C:\Users\your_user\AppData\Roaming\Godot\app_userdata\High School of Succubus\saves