A very popular actress, Shiruku Ieiri, comes to Makoto Mirai Academy to film a TV program which has her joining in on a play as a member of the drama club. But right before the performance a very special costume goes missing from the club office.

A client comes to the CUREtto Detective Agency, asking them to help solve a mystery.

A calling card from the Phantom Thieves' Guild is sent to the Hosho Art Museum. Anna and Mikuru arrive on the scene, there Luluka strikes a conversation with Anna while in the Starlight Princess display room.