In My Sassy Girl when Gyeon-woo bravely walks into an all-female class to give 'The Girl' a rose while she is playing the piano.

It's a break from the constant torture the girl gives to Gyeon-woo in the film. Of course the girl has her reason for being how she is. The scene with the piano and how Gyeon-woo breaks out of his disguise to casually present a romantice gesture was just...simple. Not sure how else to describe it but it was nicely done.