Morino Amane is a stylish thirteen-year-old girl with a keen eye for fashion. Her life takes an unexpected turn when she helps out a classmate, an act that leads her to become a designer for her most beloved clothing brand, Angel Blue. Armed with her own sense of style and the guidance of the talented upperclassman Nakayama Aoi, Amane begins to solve the personal problems of her friends, using her growing skills in design and fashion to help each person find confidence and self-expression. The story unfolds in a middle school setting, where everyday school life intertwines with the glamorous yet demanding world of fashion design. Through various narrative arcs, Amane learns to balance her new responsibilities with friendship, romance, and the pursuit of her own dreams, gradually growing from a fashion-obsessed student into a capable young designer.