'Hotel De Luna' is officially the highest-rated drama in tvN history.
The popular drama starring IU and Yeo Jin Goo hit an average of 12% rating on the entire drama. With the proliferation of more and more TV channels and other forms of broadcasting (such as web dramas) reaching over 10% ratings is no easy feat. However, it is definitely a stark contrast from ratings in the past for popular dramas which have reached up to 49.4%. In fact, there aren't many programs that consistently hit over 5% ratings at all unless they are popular variety shows such as 'I Live Alone'.
Regardless, 'Hotel De Luna' made a mark on tvN's broadcast history and drew lots of attention and popularity with the production of the drama.