Fantasies and miracles have never interested Ayu Tateishi, a popular second-year middle school student. She is content with maintaining her cool, calm, and collected image—all to catch the eye of her crush, Tetsushi Kaji. Ayu's carefree youthful days are interrupted by the arrival of Nina Sakura, a new transfer student who turns out to be a witch. As the only person aware of Nina's ability to cast spells using a mini-computer, Ayu is forced to assist Nina with her mission to find the five Holy Stones, which qualifies her to marry the prince of the Magic Kingdom. Unfortunately, Nina's ineptitude with magic and her habit of meddling in Ayu's personal life cause nothing but trouble for the pair, as Ayu toils to maintain her good reputation and Nina struggles to hide her secret from the discerning eye of Hiroki Tsujiai, Tetsushi's best friend and an avid manga fan. And when Nina's search for the five Holy Stones brings allies and challengers from the Magic Kingdom, Ayu is dragged into a world she never even dreamed was possible.