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!

After returning from a seaside vacation, Nanami is shocked to discover that the townsfolk consider her shrine abandoned. She decides to hold a summer festival for the local humans and yokai to revitalize the shrine's reputation. But Tomoe is strangely reluctant. Can Nanami pull off the festival with a little help from her yokai friends, or will Tomoe's naysaying spell disaster?