I watched this because of Song Joon Ki. At first I was not so interested,and would just wait to see Song Joong Ki's scenes. But eventually I liked Yoo Ah In's character and enjoyed the story. I enjoyed the friendship between the 4 main leads more than the love story. Joong Ki's character is very different from that of DOTS, thus I enjoyed watching him. Yoo Ah In's character is lovable also. I would recommend you watching this if you have the luxury of time but I don;t think I will watch it again. I might just browse some SongJoongKi's scenes randomly.