Abandoned by her father, Nanami finds herself homeless when she meets a man who offers his own home to her. His home turns out to be a shrine where his supernatural household awaits the return of their lord and master after a 20-year absence.

Nanami saves a pretty white snake at school and for her trouble, she becomes marked as the snake's intended. Tomoe transfers into Nanami's class to protect her, but the snake comes for her anyway.

Nanami decides to hold an autumn festival at the shrine to let the locals know that it's not abandoned or haunted. But as she prepares for the festival, Otohiko comes along to throw a wrench into things.

Unable to exorcise the miasma encroaching on the shrine, Nanami believes she is useless and leaves. Finding her gone, Tomoe and Mizuki go searching for her, leaving the shrine and the miasma to Onikiri and Kotetsu.

As the land god of the Mikage Shrine, Nanami is invited to the annual gathering of the gods in Izumo, but on the one condition that she must pass a test administered by Otohiko.

Tomoe gets some insight into Nanami's childhood. And they finally get through the torii gates to see the Year God.