Born into a lineage of miko, Yagatame Sumika is a high schooler with the ability to see “weird things” that ordinary people can’t see. She spent her days being compared to her high-achieving younger sister, causing her to struggle to find her meaning of existence. However, she faces a crisis when a spirit is suddenly released during her family’s tradition of “Full Moon Prayer”! Another spirit appears there, and he calls the failing Sumika the sacrificial princess…?!