Mia asks you out after cursing Erika. It's a very straightforward question and answer. Maybe you rejected her offer?
Oh, so it's merely just the simple one that leads to her getting a dorm room? I thought there'd be a follow up date like actually going somewhere, I just wanted to ensure that dating Isabella doesn't conflict with it or helping cure Erika.
It doesn't conflict. There's a Mia date planned for after patch 0.50.
