Opening the door would lead to an abandoned classroom. Entering would surely surprise the girls, what with the absence of interesting things, including the smell of dust, which was practically absent despite the clutter.

The classroom has no windows, a few desks piled up, a chalkboard that lies on the ground, covering a wall and has some old cabinets with large drawers, some of which won't budge

(Suggested move order: Ami or Asami.)