I didn't bother watching this at first since it looked like a romance between two characters having a huge age gap --BUT I WAS WRONG--. I loved the characters especially Dong Hoon and Ji-An especially their mentor-friend relationship which is mature, but endearing. Even if Dong Hoon was hurting inside, he always extended his help to Ji-An and his other colleagues. It shows that we always have a choice in our life to be happy and to remain being happy. "Myself in my heart" is the OST that summarizes this kdrama. Highly recommended!