Story
ONA — Fall 2016, 1 episode, Finished.
This short commemorates the 5th anniversary of The iDOLM@STER Cinderella Girls game featuring the cast as they will be shown in the Cinderella Girls Gekijou anime coming out in 2017. The girls contemplate half a decade passing and worry about aging and their progress as idols.
Synopsis via AniList (English).