I'm not the biggest fan of time travel dramas, but this was one made me reconsider my opinion of it. I mainly watched it because of choi hyun wook as the other characters were slightly unfamiliar to me and it also included a hearing impaired character which always intrigued me whenever they appeared in dramas but I stayed until the end as the presence of the other characters made it even enjoyable.

The mixture of friendship, high school, family and love was nicely potrayed. The most I enjoyed was the chemistry between yi chan and cheong ah. I loved and adored them very much!! Learning about cheong ah's past was aslo very interesting.
All the characters, especially the students were refreshing and heartwarming to see.

Honestly, I loved the setting whenever it took place in the past rather than in the modern days. The modern day scenes just seem a bit awkward to me for some reason. Maybe because I'm such a nostalgic person ^_^. So if you are one, you should definitely give this drama a chance.