Star Plus One is a collaboration Mobile game made by Toei Animation and COLOPL, which birthed on 2012. And it's also a idol theme web page game.
Official page: https://www.toei-anim.co.jp/sp/stapl/
Good character design so I storaged 2 LoRAs for several month...
Mashiro Elis is the main character in the main group Team Étoile.