[The audio that comes back starts with an awkward, forced laugh, and he'd be waving his hand in a gesture of "no worries!" if she could see him. But that would just make it more obvious that he's totally Not Fine, so he's grateful this is sound only.]

Miss Yang! I'm glad the both of you are alright. That is, you are both fine, aren't you? I've been staying at home, so nothing has bothered me at all, luckily!

[Yeah, he's faking it hard, but after being blinded for a good portion of the week and hiding out at home because of it, he almost doesn't even care how unconvincing he sounds.]