For sixteen years, Asagiri Kanna endured a life marred by suffering and secrets, with even her mother keeping her at arm's length for unknown reasons. However, everything changes on her 16th birthday when a demon named Shizuma Mitsuaki arrives to claim her. It is then revealed to Kanna that she is destined to be a demon's bride, leading her to Kigasato High School, a realm inhabited by demons. Her intended demon groom, Kitou Kaki, the ruler of all demons, greets her arrival with displeasure, setting the stage for a tumultuous journey ahead.