Kamisama Hajimemashita

From Viz:
Nanami Momozono is alone and homeless after her dad skips town to evade his gambling debts and the debt collectors kick her out of her apartment. So when a man she's just saved from a dog offers her his home, she jumps at the opportunity. But it turns out that his place is a shrine, and Nanami has unwittingly taken over his job as a local deity.
Nanami has all kinds of new responsibilities she doesn't understand, dangers she's unaware of, and a cranky ex-familiar who's actually pretty hot. What's a new-fledged godling to do?

Original Manga
Official English