do not mind negative reviews about BIG and watch it.. this drama is the reason i signed in to this site.. though i was regular visitor of this website i didn't wanted to make a account but all these negative comments and reviews forced me to signed in write a positive review about this kdrama cuz it really deserve good positive review.. Story it was really romcom plus melodrama..(just the way i like it) there were sweet cheesy moments funny moment and and also the moments which make make your heart hurt and burst your mind to find a solution for their love story.. but..i must say its a happy ending!!! most people say it was a bad sad ending...but it was not.you just have to pay attention to the story from the beginning..may be for the people who watched from TV could've been little tiresome..but those who do drama marathons like me...it just a perfect drama with all the emotions! P.S- don't blame about the ending if you don't pay attention..cuz if you did you will understand the ending will not end up getting disappointed.. Acting Gong Yoo was perfect in both roles...the 30 years old doctor and the 18 years old smart boy..he did his job perfectly as always...he is an actor who i fell in love with for his acting skills first.. i gave a try for this drama despite of all the negative comments and reviews just because i knew he is an amazing actor who wouldn't choose stupid drama.. P.S- You must watch this if you're a fan of Gong Yoo. :P !!!!!!!!!!!!!!! Lee Min Jung also her did her job well. she portrayed a sweet teacher and dumb girlfriend..even though i saw her in BOF i didn't notice she was this beautiful..but with this character she was so adorable girl. Suzy was another one who got negative comments for her character..but i think she did her role very well..even though i don't like her that much she portrayed that teen character amazingly.. Shin Won Ho didn't had much screen time so i cant tell about him . overall the entire cast did their job well Music It had good OST.. cuz i know when a drama doesn't have good ost you wont get those feelings on those situations.but here the songs made me feel those situations though i don't understand Korean. Re-watch Value i never watch any drama again...so i'm not the person to talk about that. Overall IT WAS A REALLY CUTE DRAMA..IT IS WORTH TO WATCH!