Magical Sisters LuluttoLilly

Fuu Nonoyama and Rui Nonoyama are sisters from a world of magic, once close but now distant. Without warning, two cat-like spirits, Uguisu and Azuki, grant them magical powers that let them transform into idol magical girls. But there's a condition: their abilities will vanish after a year, and they must keep magic a secret. Unaware that each other has also gained these powers, Fuu and Rui separately embark on their new lives as idols.