I came across this drama in just browsing some recommended unpopular but good Chinese drama. And at first I was a little doubtful because I do not like student or high school setting drama. But this drama changed my prospective about dramas with this kind of settings.

It is realistic life happenings and decisions which makes it more interesting. Although the plot has a time travel or "experience the past" fantasy blend to it. It will not disappoint you because of the mature growth of characters in it.
The ending although it could have been more explained, it have a good open end which leaves audience to their imagination.

Hope we can get more dramas like these.