It's a brilliant ones I've watched K-dramas for last 10 years and I think this is the one of my recommended ones. I know the characteristics of K-dramas year by year are really really more detail when it talks about drama plots and more complicated, but this story gives me another refreshing plot without thinking out loud about the plot. I love the way how Yeo Ha-jin stayed next to Lee Jeong-hoon for waited him to opened his heart for her. I love the way how Lee Jeong-hoon tried to open up himself and his heart for Yeo Ha-jin. Their age gap are no joke but they could bring their self up and gave them all for this drama, also their chemistry were sooooo real for called like.. "it was just acting". I, myself, don't like to pairing main leads in one drama and hope them become true in real life, but, Kim Dong-wook and Moon Ga-young really made me to do this one (and I really they have another same project as main leads in future lol). If you are the newbie in K-drama world and hesitate what's first drama should to watch, I surely recommend you this drama as your start to watch. No regret at all.