Harumiya Moeko is an ordinary first-year high school student who lives with her relatives near Shimogamo Shrine in Kyoto. Her favorite idol is her handsome childhood friend, Kamo Riryu, who saved her when she was a child. Now a university student, she worships Riryu as a "living god" and spends her peaceful days "supporting" him, but every once in a while, a mysterious being known as "God's Isourou" appears before Moeko...