I really struggled to complete this drama. Not only is the story completely depressing, but it was also stretched out way longer than it should have been. What kept me watching till the end were the performances. The characters in this were great in their younger, and older versions. Yeo Jin Goo was particularly impressive, and was a strong act for Micky Yoochun to follow. Yoon Eun Hye is one of my favorites, so I knew she would give a great performance, although her character was a little dull. I liked Yoo Seung Ho playing such a sinister, yet sympathetic, role as well. I think the only appeal of this drama is in the complicated characters. The overall writing, however, left much to be desired. From the very beginning, this drama sets itself up as a tearjerking melodrama, with very few lighthearted moments. Of course the story is a romantic one, but the romance is bittersweet. Once the characters are adults, the story switches to more of a revenge thriller. All the focus is suddenly put on finding who committed what crime/murder, and making them pay. Again, the romance is still part of a story, but it remains bittersweet, and now incorporates a standard love triangle. As much as I liked the 3 main characters, I was bored with their triangle, and thought it was way too predictable. Of course it's obvious who will end up with who, and watching the third wheel whine about it episode after episode was annoying. Both male leads sure knew how to obsess over a woman... geez! Even the thriller elements became boring. All the evil actions of the characters are revealed early on, so many of the episodes are spent watching characters find out what is already known to the audience. This got very old, very quickly. Instead of having that eagerness to watch the next episode, I felt like I had to force myself to finish many of the later episodes, hoping that something new & exciting would happen. It never did. I did like how the last episode wrapped everything up, if only it ended at least 5 episodes earlier, then perhaps my review would be a little better. Many dramas become repetitive towards the end, but this one was unbearably so. I won't be rewatching this, and I can't recommend it, yet I can't bring myself to call it bad either. If you are a fan of the cast, and don't mind a slow/predictable plot, then maybe you'll be entertained enough, and these 21 episodes will be worth sitting through. As for me, If I knew then what I knew now, I would have chosen to miss missing you.