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.

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!