Aaaaaaah, I want more! The chapter felt so short and I'm already reading into what will happen in the next chapters. I re-read the whole previous 26 chapters and I'm considering to read the novel translation now...
Alfred should be at the party too, and I doubt his grandmother would allow him to not greet Iris, so he should no longer be able to be by Iris' side as Dean in the future. This is probably going to be the biggest shock for Iris at this party. To be honest, I was expecting him to come clean to Iris before the party. But the path to drama is always the same so such expectations are always thwarted. Will Iris finally learn who Dean really is?!?
Perhaps it will also be revealed in this party that Iris is the founder of the Azuta corporation. If that is the case, Yuri may use her influence to cause trouble for the Azuta corporation, and thus Iris.
I wonder if Edward will cause a scene at the party if he sees Iris; I expect Yuri will plead to ignore Iris in order to look good though. Iris is still the daughter of a Duke who is the Prime Minister and Mellice who is very influential in the aristocratic society so I don't think anyone besides Edward would dare to be insulting to her. And since we know that Iris has been invited by the Queen (as I understand it, the invitation was directed to Iris, and this thus isn't the invitation Edward and Yuri were discussing towards the head of the Azuta corporation), the latter should intervene should Edward do anything silly.
I wonder why Iris thinks it's a good idea to show off a silk dress at the party considering her current status as an outcast. She says she wants to be done with this party and return to her affairs in the fief, but she's going in blazing and proud.
There's so much that could happen to Iris in the next few chapters. In addition to that, there's the background, fairly important situation, of the King being too sick to show up and likely talk of who his successor will be. Alfred cannot not show up here, as he is a potential heir.