It seems that the gift is from her Japanese fans who want to support her for her new drama 'Moonlight Drawn by Clouds.' The actress, dressed up as a guy (though she is way too pretty to pass for one) from the olden day Korea, puts on her biggest smile as she holds up the gift.
As a thanks, the actress wrote on her Instagram, "From Japanese fan union 'Yoojung Day'! Thank you so much! I will really enjoy this snack :) I love you always! You are the best."
Best of luck on your new drama, Kim Yoo Jung!