I've recently watched a Taiwanese drama called Love Keeps Going
http://mydramalist.com/taiwanese-drama/2471/love-keeps-going and although the ending was poor (imo) I really enjoyed the show as a whole. To this day, my mind can't stop thinking about this drama, it has left a big impression in my mind. I've also recently finished Heartstrings, which didn't have as much drama as Love Keeps Going, and I felt as though the relationships between the main characters could of been played around with I still really enjoyed it. The reasons being are the young cast, the tone of the drama was very uplifting, the ost, casts were very fashionable and in general I found it to be enjoyable to watch.
So I'm now looking for something similar to Love Keeps Going or Heartstrings to watch. The things that I'm looking for are:
Romance (this has to be a definite and main theme of the drama)
Cast has to look young (somewhere between 20-30)
Dramatic (would prefer the show to touch my feels) while also having some comedic theme to lighten the mood from time to time
Recent Dramas, somewhere from 2010 onwards (may consider older dramas, if they appeal to me)