The Onmyou Academy possesses 2 dorms:
The Male DormEdit
Where Harutora and the others are going. It's located 10 minutes away from the Academy.
The Female DormEdit
We don't see it in the anime.
There are two people managing those, one each. Those two are friends.
Kifu (Male Dorm's manager)
Fujino (Managing the female dorm)