These are themes have become normalized in popular series now. If this story continued and there was regret, romance, and a happy ending, I really doubt it would be this low of rating. ( ̄∇ ̄")
I'm a mess over the grandma. Her childhood memories, personal belongings and Kim Dan cherishing those things just as much as she does, despite his own suffering.
Part of why I love this series is because there was no romance. ( ̄へ ̄)