It is hard to write a review about this one because I am a little unsure how I feel exactly. Overall I really enjoyed this drama. I think the amount of friendship throughout the episodes was very strong and it made you feel really good about it. I enjoyed side story lines of other friendships, such as Na Ri's friendship. However I would have liked it if they focused on Nam Soon and Heung Soo's friendship more as I felt it gave the most affect on me and how I feel about the drama. I was unsure about the large amount of focus this drama had on the teachers. I am not sure if I liked so much story line focused around them or if I would rather it be more about the story line. Either way I would have liked their friendship to have grown closer and have some kind of a result in the end as I found it kind of vague and quickly wrapped up. I enjoyed the way they introduced characters and how they built on so many different students' stories. Especially Ji Hoon and the development of his character. But I will once again say I wish they focused on Nam Soon and Heung Soo's relationship more as I found this to be the most powerful. As for the cast, I enjoyed most of the characters, especially I think the students were picked out well. I was impressed by the amount of famous actors and actresses they had. However I am unsure about Choi Daniel who played Teacher Kang. I felt that someone else could have played that role better. I do not normally enjoy high school dramas much as I find the structure of them to be repetitive, so at the start I was unsure. But the thrilling relationships being introduced got me hooked and I am very happy I watched this drama. It is filled with friendship and relatable problems that will make you connect emotionally with the story. Also.... Lee Jong Suk <3333333333