Aikatsu Stars!

Season 1, Episode 40

Episode Title: Chasing After Princess Dia!!

Air Date: 2017-01-19

Overview:

The girls star in yet another drama, titled Aikatsu Detectives! The Princess Diamond Incident. As phantom thieves known as the Shadow Stars plot to steal Hime's Princess Diamond, Ako joins Tsubasa, Yuzu, Yozora, and Mahiru as part of an investigation team guarding the diamond at a party.