https://idolmaster-official.jp/news/01_16151
Oshiete! CINDERELLA GIRLS fes. stream information:

CINDERELLA GIRLS fes. Once Upon a St@rs will feature 4 new songs (for each of the 4 performances).

Clothing design by Kisumi Rei
https://www.pixiv.net/users/5057400
The center motif is an hourglass. The puff sleeve resembles a pumpkin carriage when viewed from the side.

Production on the live will be done by LATEGRA, Inc.

Riamu will be live-streaming to promote the live.
The format will be 「Yumemi Riamu wants to 〇〇」

The 1st stream:「Yumemi Riamu wants to save」is coming "sometime in summer"
You can submit scenarios that involve being saved until 7/20 23:59 JST
https://forms.gle/TCtUE7Puo48YWMa5A

If it isn't already known, Kanade's VA watched the EXPO performance live (and was sitting next to Nana's VA).