Yuina Akagi is an ordinary high school freshman in Maebashi City, Gunma Prefecture—until a talking frog named Keroppe appears and throws an unexpected proposal her way: "Why don't you become a witch?" Before she knows it, Yuina's closet becomes a gateway to a mysterious world, where she meets four other girls—each with their own quirks and magical potential. There's the fiery Azu Niisato, the level-headed Kyouka Kitahara, the ever-optimistic Choco Mitsumata, and the carefree Mai Kamiizumi. Together, they form the Maebashi Witches, a group dedicated to granting people's wishes through magic, music, and a bit of mayhem. Their base of operation? A charming little flower shop in the heart of the shopping district—where the flowers of the heart can finally bloom. With a little magic and a lot of heart, their new life as witches is about to begin.

Seven years after humanity was devastated by a major disaster, a beacon of science and prosperity rises in Kamitsubaki City. But lurking in its shadows are Tesseractor, monsters born from human darkness. Only the Witchling, five girls with voices that wield magic, stand against them. With every note, they fight, not just to protect the peace of the city, but to heal a broken world.

Once a prize-winning violin prodigy, Hajime gave up on music after his father, professional violinist Ryuuji Aono, was involved in a scandal that led the media to harass his family. Now living alone with his mother and entering his final year of middle school, Hajime struggles to find a new career path. However, the sound of his classmate Ritsuko Akine playing the violin inspires Hajime to dream of a musical career once more. With the help of Ritsuko, Hajime prepares to take the entrance exam for the prestigious Umimaku High School. But if he wishes to join Umimaku's orchestra, Hajime must overcome his past trauma and open himself up to new musical horizons.