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!

It's the third day of the school trip, and it looks like Nanami and her friends will finally get a chance to enjoy Okinawa. However, Mikage pops up with a shinshi assignment for Tomoe--deliver a gift to the local shrine maiden. But the simple errand has complicated consequences as Tomoe is forced to face Nanami's mortality and the seeming impossibility of a yokai and a human living together happily ever after.