You’re walking around the school trying to find something that’ll relieve your boredom. You would go to the cafeteria, but it’s far too loud in there for you to handle.

You hear footsteps, probably a teacher. You quickly go into a vacant classroom to hide, as students are expected to stay in the cafeteria or library during lunch.

You expected the room to be empty, so it came as a surprise when another person is in the room. They seem to have heard you, as they look back at you.