Hey everyone! :)

I am looking up for a drama, but a forgot the name of this. If i remember correctly, there is a girl who sneak into a house in order to find something(i think, because i remember that she is searching something). She has a hat and long hair with ponytail, maybe. She is hiding behind the sofa while the boy is sitting there. Then the boy discover her. Moreover, there is a scene in the airplain too.
I hope i don't mix up more dramas, but this is what i remember aproximately. I hope you can help me. 

Thank you guys! :)