Y-You're fine, silly! I... don't think it was inappropriate at all.

[It was crazy to think that just a few short moments ago, she was sobbing. Her eyes were still watery but instead, she was feeling totally and completely happy.]

I'm really happy to hear that, thank you... [She pauses for a minute, trying to contain her pure joy at saying his first name.] Kiyotaka-kun. Yes! It would make me very happy if you called me by my first name.

But um, only if you are comfortable with it....