I wanted to like this but here was so much I just didn't like. Last things first; There is a 2 year time skip near the end with an unexplained miracle cure & a complete 180 of the male lead's personality. Then there is a bland ending where the main couple just hug. That's because they've already had an excessive amount of kissing beforehand, some of which created warm fuzzies, ( but they just kept at it & the spark just fizzled out. ) Then there is the matter of the casting. Yoon Kyun Sang was miscast. He is 6'4 and towered above his 5' costar. side views of him look like he is ominously lurking above her like a vulture! He was portraying a character whose medical condition would lend itself towards being on the slim side, but Yoon Kyun Sang is more lumberingly large. next problem I had was with the writing. Yoon Kyun Sang's character was written such that he was buffoonish with over the top comedic expressions & was repelling, not funny. He also spent the entire series being needy, with either a blank face or a hopeful desperate look, both of which were unendearing. Meanwhile, Kim Yoo Jung was perfectly cast & very appealing but was written to be too simple & incapable. It made it hard to be sympathetic to her. Her brother was also written badly & was a very flat unlikeable character. over all I'd say that it was poor writing or directing/interpretation of the character that was at fault. The real problem for this series is that there is a better rendition out there.NO, the real problem is that I watched the Chinese version (Touch Your Heart) before watching this & it was much much better. & randomly : Jasper Liu, the lead in the Chinese version (Touch Your Heart) looks like Song Jeu Rim's twin bother ! Clean with a passion for now was cringy & I couldn't wait to get done with it. Touch your heart I will definitely rewatch