SPOILERS!! Here's how to get all the endings:
1. Keep trying to leave town at the very bottom of the map near the post office. The guards will warn you but just keep trying.
2. There's multiple ways to get this ending but the way I did it was we agreed to help Eury and delivered mail like normal. The day she leaves, just go to bed.
3. The day Eury leaves, check her computer and then go to the dorms. Go to the second floor and knock on Cain's door. Talk to him and you'll end up telling him what you saw. DONT AGREE TO BE OBEDIENT, say no to Cain! (If you say yes, it goes to the second ending).
Once you're in the church and you've finished looking at all the files, MAKE SURE TO SAVE. You'll have a dice roll when you go back up that branches the ending. To get this ending, you fail the roll.
4. To get this ending (true end?), you succeed in the church roll.