I think many people are turned off by the theme of the show.
The promotions looked little too intense for me and I wasn't sure that I wanted to watch it initially. But I am so glad I did. It is such a special show with lovely characters and a great story and surprisingly bright despite the subject matter.
I am not a serial kdrama watcher and this is only the second one I am watching as it is airing but I doubt there have been many other shows that have handled this storyline as sensitively and beautifully.
Watching Moon Sang Tae evolve into the adult he wants to be is so heartwarming especially in the recent episodes.
Sad that only 4 episodes are left but this one will definitely be worth more than a few rewatches.
For those still hesitating, please do not miss this show.