Mahou no Shimai LuluttoLilly follows Fuu Nonoyama and Rui Nonoyama, two sisters who live in a world where magic still exists, even as their relationship has quietly grown strained. Their lives change when the cat-like spirits Uguisu and Azuki appear and grant them the power to transform into magical girl idols, drawing them into a dazzling stage career with one strict condition: the magic will last for only one year, and no one must ever learn that magic exists.
The situation becomes even more delicate because Fuu and Rui do not know the other has received the same gift. Each enters the idol world carrying a secret she cannot share, while rehearsals, performances, and public expectations steadily widen the distance between them. As music and magic collide with the pressure of everyday life, Mahou no Shimai LuluttoLilly follows their struggle to protect both their careers and the bond they once took for granted. Beneath the lights and applause, the series becomes a story about sisterhood under pressure, hidden identities, and the fragile hope that two girls who have drifted apart can still find their way back to each other before time runs out.