Once upon a time, Nadeshiko Aoi, a high school girl with a slight penchant for geekiness, comes across an exquisite boy. This young man embodies a sense of mystery and extends an offer to Nadeshiko that she could have never imagined. He asks her whether she would like to uncover the truth about her sister who has gone missing for two years now. Of course, Nadeshiko is curious to know and agrees to listen to his proposition. However, the trade-off for such information is that she must enter into a contract with the devil and become a witch! As if that's not enough, the witch has a task to accomplish - to take part in a "War" of sorts. What lies ahead for Nadeshiko as she gets swept up in this clash of competing objectives?
