For me, this drama is so far the best drama 2019. It has great and original story (which is not easy to create these days), awesome cast and the music creates the right atmosphere.
Cast:
Main good guy - Nam Goong Min is wonderful, handsome and his acting is convinving as always. I love him and I don't know any movie or drama, which wouldn't be in a high quality.
Main bad guy - Choi Won Yong was incredible. I loved him in Kill me heal me and I love him here. No spoilers, just saying that his acting was truly magnificent and in this drama, he can really compete with Nam Goong Min.
Overall: I really recomend this drama to people, who want to have a little romantic comedy pause and watch something more serious and sometimes hilarious with definitely satisfying end.
Just watch and enjoy guys.:)