Ayu Tateishi is a popular second-year middle school student, admired for her calm, cool, and collected demeanor. However, this carefully maintained image was entirely fabricated to attract the attention of her crush, Tetsushi Kaji, who had once complimented her on those very traits. Ayu’s thoughts are consumed by studying, playing tennis, and seeking opportunities to speak with Tetsushi—until the day she discovers a mini-computer beneath a bench. After returning the device to Nina Sakura, a girl who had been searching for a lost item earlier, Ayu is selected by Nina as a confidante for her secret. When a dispute arises between the school’s two tennis teams over court usage, Ayu is compelled to resolve the matter by playing against Hiroki Tsujiai, the captain of the boys’ team and Tetsushi’s best friend. While dreading the possibility of losing and embarrassing herself, Ayu is approached by Nina, who reveals herself to be a witch who came to Earth after failing to graduate from the Magic Kingdom’s middle school. Hoping to help Ayu win the match, Nina imbues a piece of chocolate with a spell that might just prove useful...