I think this drama does a great job at highlighting the painful problems that occur in our lives.
From the main character's you can see that the FL deals with her age and how society puts a label on how she should live her life. They often showed others rushing her into marriage in order to have a child that she dreamed of however, she had other barriers that constantly slowed her down. She had problem's with her mother/father (showing how childhood can affect your adult life), problem's with her health/age (lowering her chances of having a baby), problem's with her work, problem's with a long term friendship, problem's with the man she loved and many more. It is very realistic and sometimes it can be heartbreaking to hear their deep conversations.
Moving on to the ML, at first I thought he would be a jerk however, it turned out that he was a very soft hearted man carrying complicated feelings. His past love had scarred him and the reason was big enough for me as the viewer to understand why he was so hesitant. As a man infertility is not spoken much so I'm glad this drama decided to talk about it. The main couple's romance is indeed slow and reserved however, I think they are still pretty sweet. They can be immature at times despite them being in their late 30s and early 40s.
If you are hesitant to watch this drama because of the annoying second ML, I hope you can push that aside. I admit he is very annoying and irritating but I think the rest of the drama deserves a chance!