It's an amazing drama...especially Kim Samuel played a role of rude behavior guy....I can't imagine he can play this type of role....but it really suits him....this drama is my first korean drama....and this drama was fabulous.... Oh Sana who is Oh jina's younger sister was so funny... At last she fell in love with rook hi who is Oh jina's female friend and it was so funny when Oh Sana realize that she is a girl not a boy.😂😂😂😂😂after all everyone should watch this drama...it's very very good....