Are we supposed to think this is some kind of big reveal ? Chizuru's not an idiot. She's been milking Kazuya for literally tens of thousands of dollars, over more than a year. It's pretty sure she's already picked up that the guy was slightly infatuated with her. And did so quite a while ago.
Anyway, that chinese skirt better not be a red herring. We need to see her wearing it now.