Ayu Tateishi, a well-regarded second-year student at her middle school, meticulously upholds an image of calmness and sophistication to capture the attention of her crush, Tetsushi Kaji. However, her world revolves around studying, tennis, and weaving opportunities to interact with Tetsushi—until a chance encounter leads her to discover a small computer left under a bench. Upon returning it to Nina Sakura, a girl in search of the lost item, Ayu is unexpectedly drawn into a secret shared by Nina. When a conflict arises between the school's two tennis teams over court usage, Ayu is thrust into a high-stakes match against Hiroki Tsujiai, the boys' team captain and Tetsushi's close friend. Amidst her fear of failure and humiliation, Ayu receives support from Nina, who discloses her true identity as a witch banished from the Magic Kingdom's school. Eager to aid Ayu, Nina enchants a piece of chocolate with a potentially game-changing spell...