Since he was young, Tadahiro Amatsu has stood out for his unique eyes: one brown and the other hazel. However, there is a dark secret behind his left eye that has made Ayatara Miramune, a masked sorcerer, and his demonic followers target him as their next victim. Yuzu Hieda, an apprentice priestess, rallies a group of four girls from her school to fight against the encroaching demons. With guidance from Yuzu's older sister Kurako, the five young priestesses must work tirelessly for months to improve their skills and combat the threats facing their town.