By exact reaction can I just skip the next year of my school life and just get to freshman year? <<< Honey, you do not want to be a Freshman. As a Sophmore I can personally tell you EVERYONE HATES FRESHMAN.
If you watch the episode again, and pay attention to her reaction, you can kinda see her look at him a bit strangely. But I'm sure that a part of her was like, there's not way he's Chat Noir! Adrien doesn't make stupid puns and horribly timed flirtations