You will end up crying rethinking the problems that you made so huge in your head are not that huge compared to what your loved ones will feel after you decide to give up because of those problems. This story gives a reality check to you about the consequences of selfish decisions which you thought wouldn't affect anyone.
This drama has the perfect runtime which gives the right amount of information required and the story progression does not end up looking rushed or slow. The acting was one of the main reasons behind such perfect execution. The ending made me realize that I need to appreciate my present, even though we may face some obstacles here and there still, is there anyone in this world who hasn't faced any hardship whatsoever?