Megami Chiba is an eighteen-year-old girl who not so long ago graduated from an elite school. Shool isn't accessible to ordinary people from outside. After graduating from this high school, she gets into an agency EGAO, where she hunts magical creatures called. She forms the first two-person group, with her older brother. The girl is full of verve and self-confident, she was pushed into a mission that she couldn't complete alone.