This was a relatively good drama up until the last few episodes where Yoon Se Na (Krystal) starts acting all pathetic.... Story: About a guy who falls for his prior girlfriends younger sister... Cast: Lee Hyun Wook (Rain) the main reason I watched this drama and the best thing about this drama - Rain's acting is always top-notch, I loved the way he dressed on this drama and his hairstyle was attractive too <3 He was very compassionate and caring & had good business sense. His acting alone was a 9/10 at least. Yoon Se Na (Krystal) her acting is really weak (she needs to hone her skills) I liked her during most of the drama until the last few episodes where she started to irritate me by acting the way she did (I blame the writers) She had relatively good chemistry with Rain until the show got a bit too melodramatic where I believe her acting falls short in this department... Dal Bong (yes it's the dog) I loved him, such a cutie pie <3 Shi Woo (L or Myungsoo) I liked him early on when he had the blonde hair but after he dyed his hair his personality changed a bit and I found myself irritated with him constantly praising himself...Bae Sung Jin (Alex) a.k.a Lee Hyun Wooks best friend - I really liked him, he was a good supporting character who knew how to dress^^ He truly cared for Hyun Wook as a friend. The rest of the cast are fine but nothing worth mentioning (some of them I never understood and some of them had pointless storylines..) Music: Nothing spectacular, nothing memorable, nothing I'd want to download or listen to...just ok. Re-watch Value: 2/10 - I don't think I'd re-watch this drama... Overall: rating 7.8/10 - I enjoyed this drama all except for episodes 14 & 16 (the two episodes where I found Se Na to be irritating). If the writers had more sense this drama could have gotten a higher rating from me - If they wouldn't have made the last few episodes a bit slow and melo - I personally would have liked to see more sweet cute and fun moments together between the leads - rather than the depressing feeling I got...