Bug: So when you remove your school uniform and then start the scavenger hunt. The game doesn't allow you to either go outside and proceed with the hunt or change back clothes.
I had to sleep the night to fix this bug.
Edit: Bug 2
I don't know if this was intended, but all other missions disappear when you either fail or complete them. However mission 1 doesn't, you can still get it even after completing or failing it.
If you try to do mission 1 again, and head over to the school. The failure scene or the success screen instantly plays, you don't even get a choice whether to do the mission properly or deliberately fail.