[Oh, that honorific slip sure was a thing. Natsuru smiles shyly, feeling her cheeks flush even more now. Things have changed, certainly, but it's a little disappointing after how quickly they bonded last time that Naoto is jumping back to '-san'.]

You don't look that different! But... I almost thought you were a boy at first, without your hair and... wearing those clothes...

[Another nervous chuckle. She hopes that Naoto understands she doesn't mean anything weird by that.]

I guess I can't ask how old you really are, huh? You kinda look close to my age.

[Whatever that is. Natsuru's been going on the assumption that she's somewhere close to sixteen, give or take a year or two. Really, she wouldn't have even brought it up, except it's kind of a factor in what she's about to say next.]

I don't mind if you keep calling me '-chan'. U-Unless you'd rather use '-san'! I still want to be friends...