What i enjoyed most about this series, aside from the twin sisters mystery, is how the bully issues was played out and resolved. I was also satisfied with how the writer wrapped up the story with a meaningful message at the end. Overall, it was a great show. I definitely would recommend it to people who enjoy high school drama. Romance wise? I wasn't too invested in the love story because I didn't see any chemistry between the main couple, including the supporting character. But if i were choose, it would obviously be Yin Ah and Eun Bi. Although Nam Joo Hyuk acting is a little awkward, I find his character to be very loveable. As for Yook Sung Jae, I didn't really like his character because I find him a little annoying at time. Although his acting is better than Nam Joo Hyuk, I wasn't able to connect with him. Acting: Kim So hyun and Jo Soo Hyang definitely deserve an applaud for their excellent performance in this series. Music: The reset song was very catchy, but I thought it was over used in this series. Rewatch Value: it definitely would be a 10 because i skimmed through some episodes when I marathon it.