Momo Kaguya, 17 years old, works part time at a shrine. Though she appears to be just an ordinary high school girl at first glance, she is a miko in training whose job is to connect people with gods. Leaving her house, she spends her days training with Inari's divine messenger, Kouen.

One day, Momo's classmate reaches out to her about a mysterious incident. It ends up being the first case she solves alone. In the midst of taking a deep sigh of relief, she is summoned by a member of the main branch of the household. She is introduced to Shinonome Sora, who is in charge of community safety. "If anything happens from now on, please rely on him." Though Momo is at a loss for words with the quiet and boorish man, he escorts her to her lodging. Just at that moment, she feels a sinister presence from the shrine nearby..