I like this kind of drama because neither one of them is at fault. Ijichi couldn't have known that Amane would be sensitive about something like this because she doesn't know her yet. And Amane is perfectly entitled to feel uncomfortable. I think saying you're never gonna come again because this happened once is a bit extreme though. If Ijichi just promises not to invite other people next time, it'd be just fine. As usual, Amane is the more childish of the two.