Oumi Sara just moved to the small town of Anamori where her older sister Chisato works as a teacher at Karita Academy. Sara senses her sister might be hiding something from her and what she learns is that Chisato is part of a team called Qeenaatha, who fight against evil supernatural beings that threaten the town. But when Chisato is taken out of commission, Sara becomes the new member of Qeenaatha. She thought making new friends was going to be the worst of her problems, not becoming a costumed heroine.