A petty argument between sisters spirals into actual magic, and the movie stops to let that weight settle instead of rushing to fix it. Doremi becomes a mouse not as a joke but as a mirror, Pop sees exactly what her anger did, and the whole thing becomes about two kids learning they can hurt each other in ways they didn't expect. The animation breathes room for quiet moments that the TV series rarely had, turning a 27-minute story into something that feels like it understands what sisterhood actually costs.

While out foraging with Hana, Pop finds a lovely rose in the Queen's garden and carries it home, unaware that it makes every wish come true, whether kind or cruel. A kind wish makes the rose bloom white, while a cruel one turns it black and makes it wilt. After a heated fight with her sister Doremi, Pop wishes that Doremi would lose all her magic and become a mouse. The wish comes true, and comic chaos follows as Doremi and her friends work to set things right. The film is a magical girl comedy built on a sibling quarrel gone wrong.