Scenario:After visiting the Headmasters office with Asuka and Crystal you find out there is No Known Way for You To Return. Which Means that if there is a way Nobody knows what it is, so you must make a choice. Either spend whatever time you have here looking for a way back home or Attend the school like everyone else and the friends you make might help you a little.

If you choose to attend the school which would be the best path you must ask for a dorm key.

Your key and Lock will match. Good Luck.