are there more stories left after finishing all of the assignments in Auxiliary hall? ive finished all of those, but still if i check the current tasks in room 102, it is shown as i should complete the hall assignments.
Have you done all of the assignments both upstairs and downstairs?
If you've done them all, the next thing you need to do is at night time. Use a HOT Coffee bean at the Inn, then explore around the campsite. You should be able to find something going on at the windmill...
