I have watched Another Parting and Line Romance. I found it amazing that even though they had only 3 episodes at around 15 minutes each, they were really interesting.
I was wondering are there other mini dramas out there anyone would recommend?
I second Tsubasa no Oreta Tenshitachi (season 1 and 2), and add Le Jun Kai (9 eps 15min each) and Heartbeat Love (5 episodes of 10min each). If you are looking for something short I would also recomend the movie Awaiting that has only 26min.