Strangers are only strangers until you introduce yourself and get to know them better, right? Then what they become depends on how it goes!

I'm Tsuruno Yui, by the way! [ to prove her point, and his question sounds enough like an invitation that she thinks she can maybe traipse a little closer, which she does. ]

But I haven't yet... is something up with it, if you're unsettled? [ Rather, if he's asking her that, it sounds like there's definitely something weird about it. ]