This wasn't a bad drama, but to be honest, it didn't touch me as much as other people from the reviews i read. It wasn't bad but i found it generally slow, not boring but slow. More Specifically: STORY The description of the story is somewhat misleading. The show doesn't explore the cellular memory subject that much. Don't expect here any medical exploration of the term or anything like that. This is totally a true love drama, the cellural memory is just the base of the love story. Basically we have a girl who got a heart transplant and she meets, a few years after her surgery, the husband of her heart donor. And we watch their love story unfold. The show focuses a lot on the difficulties an inter-generational couple faces nowadays (the age difference between the 2 leads is 18 years in the show and 20 in reality). I have to say the story is set up very beautifully, nicely, and complicated enough to keep things interesting, but not confusing. (mini spoiler ahead) Her new love interest (who is the husband of her heart donor) is related to her current boyfriend. My main problem with the story was that, it took them forever to understand their feelings and embrace them. And when they did, the reasons they had for not being together weren't important enough for me. Sure the affinity subject made things more complicated, but in my opinion that gets resolved fast. The show was a constant back and forth. What i mean is that, while the show has a brilliant base story here, the plot wasn't just underdeveloped but barely developed at all to be honest. In my opinion, here we have a very obvious case of the writers being afraid of making rapid and interesting story developments so the show doesn't get controversial. They have so many nice characters that are connected in unique ways, explore these connections, make the love triangle more complicated, so there can be serious reasons for the main couple to not be together. There was so much potential wasted. What i want to say is that i wasn't "wowed" enough. Everything was mild. I've seen other kdramas based on true love ect, that had some seriously wowing scenes, here everything was just... mild. Overall, the story wasn't bad, i've just seen better kdramas about true love, with faster plot developments. What i got here was some mild dramatic feels, and some mild comedy feels. I've seen dramas that were better in both aspects. The show was very enjoyable but because it was slow, it failed to make me cry that much (and i cry easily) and failed to make me laugh that much too. ACTING The awkward moment when you like Sooyoung's acting better than her singing, lol. I know Sooyoung very well, because i'm a fan of Girls' Generation (she is a member of the group), and of course her being an idol made me think twice about watching this drama. If you have the same problem, don't make this stop you from watching. Sooyoung was great. She wasn't mind blowing, but noone was. She held her own in front of veteran actors. If i didn't know she was an idol, i wouldn't have guested she wasn't an actress originally. The male lead was wonderful too. I loved the way he portrayed a 40something man with kids. His acting was very good indeed. Everyone did a wonderful job at their part, i have nothing bad to say about the acting. Best part of the show in my opinion. RECOMMENDATION/REWATCH Would i recommend this? Hmm, well, i've seen better dramas, as i've said already, both in the comedy and in the dramatic department. This was good, but nothing mindblowing. If you are a fan of true love dramas you'll like it, but would i rewatch it? no, not really. OVERALL This was a solid drama, i can't say i didn't like it, the good acting helped a lot too. I loved the way they portrayed the intergenerational relationship. The base story is wonderful too, the show could have been a lot better if the plot took some more complicated turns along the way to keep things interesting. I like my dramas with some ups and downs, and this felt like a straight line. The ending was sad, people want to see it in a positive way, but i can't. Its not that i didn't like it, but it was just sad, while it didn't need to be...