She's happy about something. Well it can't be because she's lost... but wait, she's happy that her oniichan can find her anytime, anywhere. So... AKA she's happy to get lost? :P
My Fall 2011 lineup seems to be full of surprises. To me anyways, as... I basically had prior knowledge of only 3 series for Fall (that is not a sequel), so I consider this season so much more enjoyable due to the way I anticipate new episodes with much fervor.
