Shiori was technically correct about where they're staying at being 'Aria's place'. No doubt there'll be something about Aria's backstory, I can't wait to see more about that.
We also only saw a glimpse of it this chapter, but I'll be surprised if there are no trainee idols that are involved in the next arc. Either they have some opinions on the whole SSS thing, or more likely they are someone that knows Ritsu or Hitoe and something will come from that. And of course a new member of Mimi's harem because poor Ibuki.
I am so excited for this next arc, plus there's two days of performing this time, so there are going to be so many chapters on this.