Mahou no Shimai Lulutto Lilly

Sisters Fuu and Rui were once inseparable, but distance has grown between them over the years. On the same day, each secretly receives magical power from a cat-like spirit, allowing her to transform into the older self she dreams of becoming and begin a career as an idol.

The magic comes with two harsh conditions: it will last only one year, and nobody may learn that it exists. The sisters enter the entertainment world under separate secret identities, unaware of each other's transformation, crossing paths on stage while remaining distant at home. Success gives them what they wanted, but it may also become the road that brings them back together.