I have nothing against poly relationships as long as its yuri fanfiction, so I don't really get the rage of these people in the forum. I wish I can enjoy controversial yuris with more open and friendly people, I'm never reading forums with these rude and self-entitled people always shading authors and artists as if they're saint. Stop sanitizing fictions, people are aware of whatnots, you don't have to be the Saint.
Anyway, I've been curious with the idol arc for quite a while now huhu, I hope they'll be fine.