Gong Ki-Joon and Jin Ji-Won (Kim Yoo-Han and Jo Yi-Hyun) really had a good chemistry on screen and off screen. Love the two couples who really gave a good show to this drama. I also love some character developments in being arrogant, straigh-forward, mean, and many more. Thanked God I did not watched the other School's series except Who are You: School 2015 which is also a good series too! I really love the chemistry of the two couples which are the ml and fl lead (Gong Ki-Joon and Jin Ji-Won) and second lead couple (Jung Young Joo and Kang Seo Young). There were cliché scenes which are not that really cliché for me. This drama really tells me about achieving your dreams, the sad moments in our life that we might encounter, moments that we might get to regret things, and many more as this drama really explains how our youth today experience many things to encounter in the future as a teenager. Overall, this drama is really good and how I love this drama gave me good expectations. Recommended to beginners, and also good for binge watch too! Looking forward to the cast's future projects too! (especially the Kim Yoo-Han and Jo Yi-Hyun ;) )