This movie is amazing. It had such an impact on me, I thought about it going to sleep, during the night and again first thing this morning. It has even driven me to write a review here, although probably no one will ever read this apart from me....

So - please do watch this, it is a beautiful gem of a movie with a plot twist near the end that will make every opaque story development earlier clear and comprehensible and - what is even more important - painfully emotional and sad.
As a viewer you cannot but be drawn into the characters' mysterious life but you have to be patient. If you are someone requiring constant action, linear storylines - this is probably not a movie for you. This might explain some of the unkind comments posted in the comments section.
But if you can give the story the time it needs to fully come to fruition, if you are able to just watch and follow the characters, wondering with them what is going on in some scenes, empathising with their confusion and puzzlement, - then this is the movie for you.
The acting is out of this world brilliant. Jung Woo Sung's facial expressions - a mixture between utter emptiness, curiosity and puzzlement when his charater is faced with yet another weird reaction by the people around him, another person who recognises him, but whom he doesn't - are fascinating. Like an eager puppy he stares into other people's eyes, hopeful, in search of recognition or a memory. Something that, however, usually does not happen.
I never understood why MDL wants you to rate the "rewatch value" of a drama or movie. This is not something I ever took much notice of before I started watching Kdramas. Now I am slowly beginning to see its value...because the rewatch value of "Don't Forget Me" is a full 10 points! I will definitely watch this again tonight! And probably a few more times. It's a movie that will keep on giving, becoming more meaningful the more times you watch it!