[ She doesn't want to be rude, here... The spotlight's been on her for a while now. Must be because he's a teacher (more or less) - speaking of, Miwako isn't sure how to address him, since they're speaking casually to each other, but there's still that level of... academic authority, there. They aren't friends yet, and even if they were - she still calls Seiji as "sensei," and he used to live in her house! So she just went with what felt natural. ]