It's just a fantastic show. Sometimes it's easier to review a show you didn't like because the bad aspects tend to stick out. I still want to give it a try.

What I loved about the show:
• The characters!!! Their relationship dynamics and development. I especially loved Bong Seok and Hee Soo. They were so cute and felt like real students. The way the parents tried everything and would do everything to protect their kids was really moving. It was easy to love the characters in this show.
• The plot was exciting. Good balance between heart-felt and action scenes. The origin-stories of each person was unique and interesting to see. I really hope for a second season, especially because it feels like the student's journey has only begun. I want to see them all reunite after growing a bit

The only thing I disliked:
• Spending so much time without the character of the present time while heavily focusing on the past. It's not an actual critique since I still really enjoyed these episodes

Conclusion: I want a second season!!!