A few months ago I came across it and put it off. I thought it'd be just like any other time-traveling unlogical story, but this drama exceeded my expectations. The main theme focuses on camaraderie, friendship, unity, affection between teenagers that don't change over the years, the innocence of youngsters, the bond between teachers and students, and, the pressure they have to go through. The main characters start on the wrong foot but come across each other's strengths while embracing their weaknesses. It can be considered enemies to lovers. The sole reason I started watching it was because of the cast. The male lead and second lead from A LITTLE THING CALLED FIRST LOVE were together in another high-school series, and that kinda excited me. All the characters were well played, the series portrayed its message accurately. I especially liked how the female lead was intellectual, calm, and patient, Unlike many other cdramas where the FLs are naive, stupid, childish, and always a 'damsel in distress.' I think it is quite underrated. This series deserves more recognition.