Hinaki decides to join Akari and Sumire for their three person unit, wanting to become more passionate after losing out on the Aikatsu8. After doing some model shoots for Kayoko, Hinaki is a bit concerned when she is asked to retake them, only to learn that Kayoko wants her to demonstrate a new Fine Drum Coord that she made just for her. The next day, the girls find Hinaki's photo used on a giant billboard and praise how bright she shines, inspiring Hinaki to name their unit Luminas.