I just started watching this but you know when you don't get popular cast due to budget cut then cast look alike actors. Thats what happened here(in my opinion). The 19 year old one looks like Seo In Guk and the 29 year old looks like Kim woo bin. I shit you not. I had to look clearly to confirm they were not. The premise is good and different characterisation is also good. But the 29 year old one, I mean come on. If you got crush on someone you don't go around fuc**ing people of her friends, colleages etc in front of her creating an image of playboy, slut. Then go around moping after finding that crush has fallen for other guy. Come on , what kind of shit is this character smoking?? Edit : woah.. I hated the 29 year old guy at first but he came on right track by the end. The romance was good in all three pairs. I thght it wuld not deliver but It surprised me. This is a good drama worth of 8.5 / 10