I really liked the start of this and was hooked. The effects of grief, loss and guilt, and how you can become isolated I thought were being portrayed in an interesting, way. The solution was perhaps comedic, but it wasn't making fun of the emotional pain.
Depending on how you view the FL, she is either really annoying, like an over enthusiastic sales person, or someone who just wants to do her best in a bad situation, and trapped in a role she has made for herself. The ML,Kim Young-dae, for me came out best in this, when given the chance he has acting range. The rest of the cast were pretty much given stock roles, not their fault, just a poor script.
Mid way through the story and script fell apart, and the last episode was like someone had made a poor cake as was decorating it with too much sweet icing to hide the cracks.
My score is based mainly on the first 60%, the rest had so many plot holes, and the twist at the end, sign posted from about episode 6. Just a bit disappointed.
I like the main OST song.